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/wp-includes/ -> post.php (source)

   1  <?php
   2  /**
   3   * Core Post API
   4   *
   5   * @package WordPress
   6   * @subpackage Post
   7   */
   8  
   9  //
  10  // Post Type registration.
  11  //
  12  
  13  /**
  14   * Creates the initial post types when 'init' action is fired.
  15   *
  16   * See {@see 'init'}.
  17   *
  18   * @since 2.9.0
  19   */
  20  function create_initial_post_types() {
  21      WP_Post_Type::reset_default_labels();
  22  
  23      register_post_type(
  24          'post',
  25          array(
  26              'labels'                => array(
  27                  'name_admin_bar' => _x( 'Post', 'add new from admin bar' ),
  28              ),
  29              'public'                => true,
  30              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
  31              '_edit_link'            => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
  32              'capability_type'       => 'post',
  33              'map_meta_cap'          => true,
  34              'menu_position'         => 5,
  35              'menu_icon'             => 'dashicons-admin-post',
  36              'hierarchical'          => false,
  37              'rewrite'               => false,
  38              'query_var'             => false,
  39              'delete_with_user'      => true,
  40              'supports'              => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'post-formats' ),
  41              'show_in_rest'          => true,
  42              'rest_base'             => 'posts',
  43              'rest_controller_class' => 'WP_REST_Posts_Controller',
  44          )
  45      );
  46  
  47      register_post_type(
  48          'page',
  49          array(
  50              'labels'                => array(
  51                  'name_admin_bar' => _x( 'Page', 'add new from admin bar' ),
  52              ),
  53              'public'                => true,
  54              'publicly_queryable'    => false,
  55              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
  56              '_edit_link'            => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
  57              'capability_type'       => 'page',
  58              'map_meta_cap'          => true,
  59              'menu_position'         => 20,
  60              'menu_icon'             => 'dashicons-admin-page',
  61              'hierarchical'          => true,
  62              'rewrite'               => false,
  63              'query_var'             => false,
  64              'delete_with_user'      => true,
  65              'supports'              => array( 'title', 'editor', 'author', 'thumbnail', 'page-attributes', 'custom-fields', 'comments', 'revisions' ),
  66              'show_in_rest'          => true,
  67              'rest_base'             => 'pages',
  68              'rest_controller_class' => 'WP_REST_Posts_Controller',
  69          )
  70      );
  71  
  72      // Enhance page editor for block themes by rendering template and content blocks.
  73      if ( wp_is_block_theme() && current_theme_supports( 'block-templates' ) ) {
  74          add_post_type_support( 'page', 'editor', array( 'default-mode' => 'template-locked' ) );
  75      }
  76  
  77      register_post_type(
  78          'attachment',
  79          array(
  80              'labels'                => array(
  81                  'name'           => _x( 'Media', 'post type general name' ),
  82                  'name_admin_bar' => _x( 'Media', 'add new from admin bar' ),
  83                  'add_new'        => __( 'Add Media File' ),
  84                  'edit_item'      => __( 'Edit Media' ),
  85                  'view_item'      => ( '1' === get_option( 'wp_attachment_pages_enabled' ) ) ? __( 'View Attachment Page' ) : __( 'View Media File' ),
  86                  'attributes'     => __( 'Attachment Attributes' ),
  87              ),
  88              'public'                => true,
  89              'show_ui'               => true,
  90              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
  91              '_edit_link'            => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
  92              'capability_type'       => 'post',
  93              'capabilities'          => array(
  94                  'create_posts' => 'upload_files',
  95              ),
  96              'map_meta_cap'          => true,
  97              'menu_icon'             => 'dashicons-admin-media',
  98              'hierarchical'          => false,
  99              'rewrite'               => false,
 100              'query_var'             => false,
 101              'show_in_nav_menus'     => false,
 102              'delete_with_user'      => true,
 103              'supports'              => array( 'title', 'author', 'comments' ),
 104              'show_in_rest'          => true,
 105              'rest_base'             => 'media',
 106              'rest_controller_class' => 'WP_REST_Attachments_Controller',
 107          )
 108      );
 109      add_post_type_support( 'attachment:audio', 'thumbnail' );
 110      add_post_type_support( 'attachment:video', 'thumbnail' );
 111  
 112      register_post_type(
 113          'revision',
 114          array(
 115              'labels'           => array(
 116                  'name'          => __( 'Revisions' ),
 117                  'singular_name' => __( 'Revision' ),
 118              ),
 119              'public'           => false,
 120              '_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
 121              '_edit_link'       => 'revision.php?revision=%d', /* internal use only. don't use this when registering your own post type. */
 122              'capability_type'  => 'post',
 123              'map_meta_cap'     => true,
 124              'hierarchical'     => false,
 125              'rewrite'          => false,
 126              'query_var'        => false,
 127              'can_export'       => false,
 128              'delete_with_user' => true,
 129              'supports'         => array( 'author' ),
 130          )
 131      );
 132  
 133      register_post_type(
 134          'nav_menu_item',
 135          array(
 136              'labels'                => array(
 137                  'name'          => __( 'Navigation Menu Items' ),
 138                  'singular_name' => __( 'Navigation Menu Item' ),
 139              ),
 140              'public'                => false,
 141              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
 142              'hierarchical'          => false,
 143              'rewrite'               => false,
 144              'delete_with_user'      => false,
 145              'query_var'             => false,
 146              'map_meta_cap'          => true,
 147              'capability_type'       => array( 'edit_theme_options', 'edit_theme_options' ),
 148              'capabilities'          => array(
 149                  // Meta Capabilities.
 150                  'edit_post'              => 'edit_post',
 151                  'read_post'              => 'read_post',
 152                  'delete_post'            => 'delete_post',
 153                  // Primitive Capabilities.
 154                  'edit_posts'             => 'edit_theme_options',
 155                  'edit_others_posts'      => 'edit_theme_options',
 156                  'delete_posts'           => 'edit_theme_options',
 157                  'publish_posts'          => 'edit_theme_options',
 158                  'read_private_posts'     => 'edit_theme_options',
 159                  'read'                   => 'read',
 160                  'delete_private_posts'   => 'edit_theme_options',
 161                  'delete_published_posts' => 'edit_theme_options',
 162                  'delete_others_posts'    => 'edit_theme_options',
 163                  'edit_private_posts'     => 'edit_theme_options',
 164                  'edit_published_posts'   => 'edit_theme_options',
 165              ),
 166              'show_in_rest'          => true,
 167              'rest_base'             => 'menu-items',
 168              'rest_controller_class' => 'WP_REST_Menu_Items_Controller',
 169          )
 170      );
 171  
 172      register_post_type(
 173          'custom_css',
 174          array(
 175              'labels'           => array(
 176                  'name'          => __( 'Custom CSS' ),
 177                  'singular_name' => __( 'Custom CSS' ),
 178              ),
 179              'public'           => false,
 180              'hierarchical'     => false,
 181              'rewrite'          => false,
 182              'query_var'        => false,
 183              'delete_with_user' => false,
 184              'can_export'       => true,
 185              '_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
 186              'supports'         => array( 'title', 'revisions' ),
 187              'capabilities'     => array(
 188                  'delete_posts'           => 'edit_theme_options',
 189                  'delete_post'            => 'edit_theme_options',
 190                  'delete_published_posts' => 'edit_theme_options',
 191                  'delete_private_posts'   => 'edit_theme_options',
 192                  'delete_others_posts'    => 'edit_theme_options',
 193                  'edit_post'              => 'edit_css',
 194                  'edit_posts'             => 'edit_css',
 195                  'edit_others_posts'      => 'edit_css',
 196                  'edit_published_posts'   => 'edit_css',
 197                  'read_post'              => 'read',
 198                  'read_private_posts'     => 'read',
 199                  'publish_posts'          => 'edit_theme_options',
 200              ),
 201          )
 202      );
 203  
 204      register_post_type(
 205          'customize_changeset',
 206          array(
 207              'labels'           => array(
 208                  'name'               => _x( 'Changesets', 'post type general name' ),
 209                  'singular_name'      => _x( 'Changeset', 'post type singular name' ),
 210                  'add_new'            => __( 'Add Changeset' ),
 211                  'add_new_item'       => __( 'Add Changeset' ),
 212                  'new_item'           => __( 'New Changeset' ),
 213                  'edit_item'          => __( 'Edit Changeset' ),
 214                  'view_item'          => __( 'View Changeset' ),
 215                  'all_items'          => __( 'All Changesets' ),
 216                  'search_items'       => __( 'Search Changesets' ),
 217                  'not_found'          => __( 'No changesets found.' ),
 218                  'not_found_in_trash' => __( 'No changesets found in Trash.' ),
 219              ),
 220              'public'           => false,
 221              '_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
 222              'map_meta_cap'     => true,
 223              'hierarchical'     => false,
 224              'rewrite'          => false,
 225              'query_var'        => false,
 226              'can_export'       => false,
 227              'delete_with_user' => false,
 228              'supports'         => array( 'title', 'author' ),
 229              'capability_type'  => 'customize_changeset',
 230              'capabilities'     => array(
 231                  'create_posts'           => 'customize',
 232                  'delete_others_posts'    => 'customize',
 233                  'delete_post'            => 'customize',
 234                  'delete_posts'           => 'customize',
 235                  'delete_private_posts'   => 'customize',
 236                  'delete_published_posts' => 'customize',
 237                  'edit_others_posts'      => 'customize',
 238                  'edit_post'              => 'customize',
 239                  'edit_posts'             => 'customize',
 240                  'edit_private_posts'     => 'customize',
 241                  'edit_published_posts'   => 'do_not_allow',
 242                  'publish_posts'          => 'customize',
 243                  'read'                   => 'read',
 244                  'read_post'              => 'customize',
 245                  'read_private_posts'     => 'customize',
 246              ),
 247          )
 248      );
 249  
 250      register_post_type(
 251          'oembed_cache',
 252          array(
 253              'labels'           => array(
 254                  'name'          => __( 'oEmbed Responses' ),
 255                  'singular_name' => __( 'oEmbed Response' ),
 256              ),
 257              'public'           => false,
 258              'hierarchical'     => false,
 259              'rewrite'          => false,
 260              'query_var'        => false,
 261              'delete_with_user' => false,
 262              'can_export'       => false,
 263              '_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
 264              'supports'         => array(),
 265          )
 266      );
 267  
 268      register_post_type(
 269          'user_request',
 270          array(
 271              'labels'           => array(
 272                  'name'          => __( 'User Requests' ),
 273                  'singular_name' => __( 'User Request' ),
 274              ),
 275              'public'           => false,
 276              '_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
 277              'hierarchical'     => false,
 278              'rewrite'          => false,
 279              'query_var'        => false,
 280              'can_export'       => false,
 281              'delete_with_user' => false,
 282              'supports'         => array(),
 283          )
 284      );
 285  
 286      register_post_type(
 287          'wp_block',
 288          array(
 289              'labels'                => array(
 290                  'name'                     => _x( 'Patterns', 'post type general name' ),
 291                  'singular_name'            => _x( 'Pattern', 'post type singular name' ),
 292                  'add_new'                  => __( 'Add Pattern' ),
 293                  'add_new_item'             => __( 'Add Pattern' ),
 294                  'new_item'                 => __( 'New Pattern' ),
 295                  'edit_item'                => __( 'Edit Block Pattern' ),
 296                  'view_item'                => __( 'View Pattern' ),
 297                  'view_items'               => __( 'View Patterns' ),
 298                  'all_items'                => __( 'All Patterns' ),
 299                  'search_items'             => __( 'Search Patterns' ),
 300                  'not_found'                => __( 'No patterns found.' ),
 301                  'not_found_in_trash'       => __( 'No patterns found in Trash.' ),
 302                  'filter_items_list'        => __( 'Filter patterns list' ),
 303                  'items_list_navigation'    => __( 'Patterns list navigation' ),
 304                  'items_list'               => __( 'Patterns list' ),
 305                  'item_published'           => __( 'Pattern published.' ),
 306                  'item_published_privately' => __( 'Pattern published privately.' ),
 307                  'item_reverted_to_draft'   => __( 'Pattern reverted to draft.' ),
 308                  'item_scheduled'           => __( 'Pattern scheduled.' ),
 309                  'item_updated'             => __( 'Pattern updated.' ),
 310              ),
 311              'public'                => false,
 312              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
 313              'show_ui'               => true,
 314              'show_in_menu'          => false,
 315              'rewrite'               => false,
 316              'show_in_rest'          => true,
 317              'rest_base'             => 'blocks',
 318              'rest_controller_class' => 'WP_REST_Blocks_Controller',
 319              'capability_type'       => 'block',
 320              'capabilities'          => array(
 321                  // You need to be able to edit posts, in order to read blocks in their raw form.
 322                  'read'                   => 'edit_posts',
 323                  // You need to be able to publish posts, in order to create blocks.
 324                  'create_posts'           => 'publish_posts',
 325                  'edit_posts'             => 'edit_posts',
 326                  'edit_published_posts'   => 'edit_published_posts',
 327                  'delete_published_posts' => 'delete_published_posts',
 328                  // Enables trashing draft posts as well.
 329                  'delete_posts'           => 'delete_posts',
 330                  'edit_others_posts'      => 'edit_others_posts',
 331                  'delete_others_posts'    => 'delete_others_posts',
 332              ),
 333              'map_meta_cap'          => true,
 334              'supports'              => array(
 335                  'title',
 336                  'excerpt',
 337                  'editor',
 338                  'revisions',
 339                  'custom-fields',
 340              ),
 341          )
 342      );
 343  
 344      $template_edit_link = 'site-editor.php?' . build_query(
 345          array(
 346              'postType' => '%s',
 347              'postId'   => '%s',
 348              'canvas'   => 'edit',
 349          )
 350      );
 351  
 352      register_post_type(
 353          'wp_template',
 354          array(
 355              'labels'                          => array(
 356                  'name'                  => _x( 'Templates', 'post type general name' ),
 357                  'singular_name'         => _x( 'Template', 'post type singular name' ),
 358                  'add_new'               => __( 'Add Template' ),
 359                  'add_new_item'          => __( 'Add Template' ),
 360                  'new_item'              => __( 'New Template' ),
 361                  'edit_item'             => __( 'Edit Template' ),
 362                  'view_item'             => __( 'View Template' ),
 363                  'all_items'             => __( 'Templates' ),
 364                  'search_items'          => __( 'Search Templates' ),
 365                  'parent_item_colon'     => __( 'Parent Template:' ),
 366                  'not_found'             => __( 'No templates found.' ),
 367                  'not_found_in_trash'    => __( 'No templates found in Trash.' ),
 368                  'archives'              => __( 'Template archives' ),
 369                  'insert_into_item'      => __( 'Insert into template' ),
 370                  'uploaded_to_this_item' => __( 'Uploaded to this template' ),
 371                  'filter_items_list'     => __( 'Filter templates list' ),
 372                  'items_list_navigation' => __( 'Templates list navigation' ),
 373                  'items_list'            => __( 'Templates list' ),
 374                  'item_updated'          => __( 'Template updated.' ),
 375              ),
 376              'description'                     => __( 'Templates to include in your theme.' ),
 377              'public'                          => false,
 378              '_builtin'                        => true, /* internal use only. don't use this when registering your own post type. */
 379              '_edit_link'                      => $template_edit_link, /* internal use only. don't use this when registering your own post type. */
 380              'has_archive'                     => false,
 381              'show_ui'                         => false,
 382              'show_in_menu'                    => false,
 383              'show_in_rest'                    => true,
 384              'rewrite'                         => false,
 385              'rest_base'                       => 'templates',
 386              'rest_controller_class'           => 'WP_REST_Templates_Controller',
 387              'autosave_rest_controller_class'  => 'WP_REST_Template_Autosaves_Controller',
 388              'revisions_rest_controller_class' => 'WP_REST_Template_Revisions_Controller',
 389              'late_route_registration'         => true,
 390              'capability_type'                 => array( 'template', 'templates' ),
 391              'capabilities'                    => array(
 392                  'create_posts'           => 'edit_theme_options',
 393                  'delete_posts'           => 'edit_theme_options',
 394                  'delete_others_posts'    => 'edit_theme_options',
 395                  'delete_private_posts'   => 'edit_theme_options',
 396                  'delete_published_posts' => 'edit_theme_options',
 397                  'edit_posts'             => 'edit_theme_options',
 398                  'edit_others_posts'      => 'edit_theme_options',
 399                  'edit_private_posts'     => 'edit_theme_options',
 400                  'edit_published_posts'   => 'edit_theme_options',
 401                  'publish_posts'          => 'edit_theme_options',
 402                  'read'                   => 'edit_theme_options',
 403                  'read_private_posts'     => 'edit_theme_options',
 404              ),
 405              'map_meta_cap'                    => true,
 406              'supports'                        => array(
 407                  'title',
 408                  'slug',
 409                  'excerpt',
 410                  'editor',
 411                  'revisions',
 412                  'author',
 413              ),
 414          )
 415      );
 416  
 417      register_post_type(
 418          'wp_template_part',
 419          array(
 420              'labels'                          => array(
 421                  'name'                  => _x( 'Template Parts', 'post type general name' ),
 422                  'singular_name'         => _x( 'Template Part', 'post type singular name' ),
 423                  'add_new'               => __( 'Add Template Part' ),
 424                  'add_new_item'          => __( 'Add Template Part' ),
 425                  'new_item'              => __( 'New Template Part' ),
 426                  'edit_item'             => __( 'Edit Template Part' ),
 427                  'view_item'             => __( 'View Template Part' ),
 428                  'all_items'             => __( 'Template Parts' ),
 429                  'search_items'          => __( 'Search Template Parts' ),
 430                  'parent_item_colon'     => __( 'Parent Template Part:' ),
 431                  'not_found'             => __( 'No template parts found.' ),
 432                  'not_found_in_trash'    => __( 'No template parts found in Trash.' ),
 433                  'archives'              => __( 'Template part archives' ),
 434                  'insert_into_item'      => __( 'Insert into template part' ),
 435                  'uploaded_to_this_item' => __( 'Uploaded to this template part' ),
 436                  'filter_items_list'     => __( 'Filter template parts list' ),
 437                  'items_list_navigation' => __( 'Template parts list navigation' ),
 438                  'items_list'            => __( 'Template parts list' ),
 439                  'item_updated'          => __( 'Template part updated.' ),
 440              ),
 441              'description'                     => __( 'Template parts to include in your templates.' ),
 442              'public'                          => false,
 443              '_builtin'                        => true, /* internal use only. don't use this when registering your own post type. */
 444              '_edit_link'                      => $template_edit_link, /* internal use only. don't use this when registering your own post type. */
 445              'has_archive'                     => false,
 446              'show_ui'                         => false,
 447              'show_in_menu'                    => false,
 448              'show_in_rest'                    => true,
 449              'rewrite'                         => false,
 450              'rest_base'                       => 'template-parts',
 451              'rest_controller_class'           => 'WP_REST_Templates_Controller',
 452              'autosave_rest_controller_class'  => 'WP_REST_Template_Autosaves_Controller',
 453              'revisions_rest_controller_class' => 'WP_REST_Template_Revisions_Controller',
 454              'late_route_registration'         => true,
 455              'map_meta_cap'                    => true,
 456              'capabilities'                    => array(
 457                  'create_posts'           => 'edit_theme_options',
 458                  'delete_posts'           => 'edit_theme_options',
 459                  'delete_others_posts'    => 'edit_theme_options',
 460                  'delete_private_posts'   => 'edit_theme_options',
 461                  'delete_published_posts' => 'edit_theme_options',
 462                  'edit_posts'             => 'edit_theme_options',
 463                  'edit_others_posts'      => 'edit_theme_options',
 464                  'edit_private_posts'     => 'edit_theme_options',
 465                  'edit_published_posts'   => 'edit_theme_options',
 466                  'publish_posts'          => 'edit_theme_options',
 467                  'read'                   => 'edit_theme_options',
 468                  'read_private_posts'     => 'edit_theme_options',
 469              ),
 470              'supports'                        => array(
 471                  'title',
 472                  'slug',
 473                  'excerpt',
 474                  'editor',
 475                  'revisions',
 476                  'author',
 477              ),
 478          )
 479      );
 480  
 481      register_post_type(
 482          'wp_global_styles',
 483          array(
 484              'label'                           => _x( 'Global Styles', 'post type general name' ),
 485              'description'                     => __( 'Global styles to include in themes.' ),
 486              'public'                          => false,
 487              '_builtin'                        => true, /* internal use only. don't use this when registering your own post type. */
 488              '_edit_link'                      => '/site-editor.php?canvas=edit', /* internal use only. don't use this when registering your own post type. */
 489              'show_ui'                         => false,
 490              'show_in_rest'                    => true,
 491              'rewrite'                         => false,
 492              'rest_base'                       => 'global-styles',
 493              'rest_controller_class'           => 'WP_REST_Global_Styles_Controller',
 494              'revisions_rest_controller_class' => 'WP_REST_Global_Styles_Revisions_Controller',
 495              'late_route_registration'         => true,
 496              'capabilities'                    => array(
 497                  'read'                   => 'edit_posts',
 498                  'create_posts'           => 'edit_theme_options',
 499                  'edit_posts'             => 'edit_theme_options',
 500                  'edit_published_posts'   => 'edit_theme_options',
 501                  'delete_published_posts' => 'edit_theme_options',
 502                  'edit_others_posts'      => 'edit_theme_options',
 503                  'delete_others_posts'    => 'edit_theme_options',
 504              ),
 505              'map_meta_cap'                    => true,
 506              'supports'                        => array(
 507                  'title',
 508                  'editor',
 509                  'revisions',
 510              ),
 511          )
 512      );
 513      // Disable autosave endpoints for global styles.
 514      remove_post_type_support( 'wp_global_styles', 'autosave' );
 515  
 516      $navigation_post_edit_link = 'site-editor.php?' . build_query(
 517          array(
 518              'postId'   => '%s',
 519              'postType' => 'wp_navigation',
 520              'canvas'   => 'edit',
 521          )
 522      );
 523  
 524      register_post_type(
 525          'wp_navigation',
 526          array(
 527              'labels'                => array(
 528                  'name'                  => _x( 'Navigation Menus', 'post type general name' ),
 529                  'singular_name'         => _x( 'Navigation Menu', 'post type singular name' ),
 530                  'add_new'               => __( 'Add Navigation Menu' ),
 531                  'add_new_item'          => __( 'Add Navigation Menu' ),
 532                  'new_item'              => __( 'New Navigation Menu' ),
 533                  'edit_item'             => __( 'Edit Navigation Menu' ),
 534                  'view_item'             => __( 'View Navigation Menu' ),
 535                  'all_items'             => __( 'Navigation Menus' ),
 536                  'search_items'          => __( 'Search Navigation Menus' ),
 537                  'parent_item_colon'     => __( 'Parent Navigation Menu:' ),
 538                  'not_found'             => __( 'No Navigation Menu found.' ),
 539                  'not_found_in_trash'    => __( 'No Navigation Menu found in Trash.' ),
 540                  'archives'              => __( 'Navigation Menu archives' ),
 541                  'insert_into_item'      => __( 'Insert into Navigation Menu' ),
 542                  'uploaded_to_this_item' => __( 'Uploaded to this Navigation Menu' ),
 543                  'filter_items_list'     => __( 'Filter Navigation Menu list' ),
 544                  'items_list_navigation' => __( 'Navigation Menus list navigation' ),
 545                  'items_list'            => __( 'Navigation Menus list' ),
 546              ),
 547              'description'           => __( 'Navigation menus that can be inserted into your site.' ),
 548              'public'                => false,
 549              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
 550              '_edit_link'            => $navigation_post_edit_link, /* internal use only. don't use this when registering your own post type. */
 551              'has_archive'           => false,
 552              'show_ui'               => true,
 553              'show_in_menu'          => false,
 554              'show_in_admin_bar'     => false,
 555              'show_in_rest'          => true,
 556              'rewrite'               => false,
 557              'map_meta_cap'          => true,
 558              'capabilities'          => array(
 559                  'edit_others_posts'      => 'edit_theme_options',
 560                  'delete_posts'           => 'edit_theme_options',
 561                  'publish_posts'          => 'edit_theme_options',
 562                  'create_posts'           => 'edit_theme_options',
 563                  'read_private_posts'     => 'edit_theme_options',
 564                  'delete_private_posts'   => 'edit_theme_options',
 565                  'delete_published_posts' => 'edit_theme_options',
 566                  'delete_others_posts'    => 'edit_theme_options',
 567                  'edit_private_posts'     => 'edit_theme_options',
 568                  'edit_published_posts'   => 'edit_theme_options',
 569                  'edit_posts'             => 'edit_theme_options',
 570              ),
 571              'rest_base'             => 'navigation',
 572              'rest_controller_class' => 'WP_REST_Posts_Controller',
 573              'supports'              => array(
 574                  'title',
 575                  'editor',
 576                  'revisions',
 577              ),
 578          )
 579      );
 580  
 581      register_post_type(
 582          'wp_font_family',
 583          array(
 584              'labels'                => array(
 585                  'name'          => __( 'Font Families' ),
 586                  'singular_name' => __( 'Font Family' ),
 587              ),
 588              'public'                => false,
 589              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
 590              'hierarchical'          => false,
 591              'capabilities'          => array(
 592                  'read'                   => 'edit_theme_options',
 593                  'read_private_posts'     => 'edit_theme_options',
 594                  'create_posts'           => 'edit_theme_options',
 595                  'publish_posts'          => 'edit_theme_options',
 596                  'edit_posts'             => 'edit_theme_options',
 597                  'edit_others_posts'      => 'edit_theme_options',
 598                  'edit_published_posts'   => 'edit_theme_options',
 599                  'delete_posts'           => 'edit_theme_options',
 600                  'delete_others_posts'    => 'edit_theme_options',
 601                  'delete_published_posts' => 'edit_theme_options',
 602              ),
 603              'map_meta_cap'          => true,
 604              'query_var'             => false,
 605              'rewrite'               => false,
 606              'show_in_rest'          => true,
 607              'rest_base'             => 'font-families',
 608              'rest_controller_class' => 'WP_REST_Font_Families_Controller',
 609              'supports'              => array( 'title' ),
 610          )
 611      );
 612  
 613      register_post_type(
 614          'wp_font_face',
 615          array(
 616              'labels'                => array(
 617                  'name'          => __( 'Font Faces' ),
 618                  'singular_name' => __( 'Font Face' ),
 619              ),
 620              'public'                => false,
 621              '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
 622              'hierarchical'          => false,
 623              'capabilities'          => array(
 624                  'read'                   => 'edit_theme_options',
 625                  'read_private_posts'     => 'edit_theme_options',
 626                  'create_posts'           => 'edit_theme_options',
 627                  'publish_posts'          => 'edit_theme_options',
 628                  'edit_posts'             => 'edit_theme_options',
 629                  'edit_others_posts'      => 'edit_theme_options',
 630                  'edit_published_posts'   => 'edit_theme_options',
 631                  'delete_posts'           => 'edit_theme_options',
 632                  'delete_others_posts'    => 'edit_theme_options',
 633                  'delete_published_posts' => 'edit_theme_options',
 634              ),
 635              'map_meta_cap'          => true,
 636              'query_var'             => false,
 637              'rewrite'               => false,
 638              'show_in_rest'          => true,
 639              'rest_base'             => 'font-families/(?P<font_family_id>[\d]+)/font-faces',
 640              'rest_controller_class' => 'WP_REST_Font_Faces_Controller',
 641              'supports'              => array( 'title' ),
 642          )
 643      );
 644  
 645      register_post_status(
 646          'publish',
 647          array(
 648              'label'       => _x( 'Published', 'post status' ),
 649              'public'      => true,
 650              '_builtin'    => true, /* internal use only. */
 651              /* translators: %s: Number of published posts. */
 652              'label_count' => _n_noop(
 653                  'Published <span class="count">(%s)</span>',
 654                  'Published <span class="count">(%s)</span>'
 655              ),
 656          )
 657      );
 658  
 659      register_post_status(
 660          'future',
 661          array(
 662              'label'       => _x( 'Scheduled', 'post status' ),
 663              'protected'   => true,
 664              '_builtin'    => true, /* internal use only. */
 665              /* translators: %s: Number of scheduled posts. */
 666              'label_count' => _n_noop(
 667                  'Scheduled <span class="count">(%s)</span>',
 668                  'Scheduled <span class="count">(%s)</span>'
 669              ),
 670          )
 671      );
 672  
 673      register_post_status(
 674          'draft',
 675          array(
 676              'label'         => _x( 'Draft', 'post status' ),
 677              'protected'     => true,
 678              '_builtin'      => true, /* internal use only. */
 679              /* translators: %s: Number of draft posts. */
 680              'label_count'   => _n_noop(
 681                  'Draft <span class="count">(%s)</span>',
 682                  'Drafts <span class="count">(%s)</span>'
 683              ),
 684              'date_floating' => true,
 685          )
 686      );
 687  
 688      register_post_status(
 689          'pending',
 690          array(
 691              'label'         => _x( 'Pending', 'post status' ),
 692              'protected'     => true,
 693              '_builtin'      => true, /* internal use only. */
 694              /* translators: %s: Number of pending posts. */
 695              'label_count'   => _n_noop(
 696                  'Pending <span class="count">(%s)</span>',
 697                  'Pending <span class="count">(%s)</span>'
 698              ),
 699              'date_floating' => true,
 700          )
 701      );
 702  
 703      register_post_status(
 704          'private',
 705          array(
 706              'label'       => _x( 'Private', 'post status' ),
 707              'private'     => true,
 708              '_builtin'    => true, /* internal use only. */
 709              /* translators: %s: Number of private posts. */
 710              'label_count' => _n_noop(
 711                  'Private <span class="count">(%s)</span>',
 712                  'Private <span class="count">(%s)</span>'
 713              ),
 714          )
 715      );
 716  
 717      register_post_status(
 718          'trash',
 719          array(
 720              'label'                     => _x( 'Trash', 'post status' ),
 721              'internal'                  => true,
 722              '_builtin'                  => true, /* internal use only. */
 723              /* translators: %s: Number of trashed posts. */
 724              'label_count'               => _n_noop(
 725                  'Trash <span class="count">(%s)</span>',
 726                  'Trash <span class="count">(%s)</span>'
 727              ),
 728              'show_in_admin_status_list' => true,
 729          )
 730      );
 731  
 732      register_post_status(
 733          'auto-draft',
 734          array(
 735              'label'         => 'auto-draft',
 736              'internal'      => true,
 737              '_builtin'      => true, /* internal use only. */
 738              'date_floating' => true,
 739          )
 740      );
 741  
 742      register_post_status(
 743          'inherit',
 744          array(
 745              'label'               => 'inherit',
 746              'internal'            => true,
 747              '_builtin'            => true, /* internal use only. */
 748              'exclude_from_search' => false,
 749          )
 750      );
 751  
 752      register_post_status(
 753          'request-pending',
 754          array(
 755              'label'               => _x( 'Pending', 'request status' ),
 756              'internal'            => true,
 757              '_builtin'            => true, /* internal use only. */
 758              /* translators: %s: Number of pending requests. */
 759              'label_count'         => _n_noop(
 760                  'Pending <span class="count">(%s)</span>',
 761                  'Pending <span class="count">(%s)</span>'
 762              ),
 763              'exclude_from_search' => false,
 764          )
 765      );
 766  
 767      register_post_status(
 768          'request-confirmed',
 769          array(
 770              'label'               => _x( 'Confirmed', 'request status' ),
 771              'internal'            => true,
 772              '_builtin'            => true, /* internal use only. */
 773              /* translators: %s: Number of confirmed requests. */
 774              'label_count'         => _n_noop(
 775                  'Confirmed <span class="count">(%s)</span>',
 776                  'Confirmed <span class="count">(%s)</span>'
 777              ),
 778              'exclude_from_search' => false,
 779          )
 780      );
 781  
 782      register_post_status(
 783          'request-failed',
 784          array(
 785              'label'               => _x( 'Failed', 'request status' ),
 786              'internal'            => true,
 787              '_builtin'            => true, /* internal use only. */
 788              /* translators: %s: Number of failed requests. */
 789              'label_count'         => _n_noop(
 790                  'Failed <span class="count">(%s)</span>',
 791                  'Failed <span class="count">(%s)</span>'
 792              ),
 793              'exclude_from_search' => false,
 794          )
 795      );
 796  
 797      register_post_status(
 798          'request-completed',
 799          array(
 800              'label'               => _x( 'Completed', 'request status' ),
 801              'internal'            => true,
 802              '_builtin'            => true, /* internal use only. */
 803              /* translators: %s: Number of completed requests. */
 804              'label_count'         => _n_noop(
 805                  'Completed <span class="count">(%s)</span>',
 806                  'Completed <span class="count">(%s)</span>'
 807              ),
 808              'exclude_from_search' => false,
 809          )
 810      );
 811  }
 812  
 813  /**
 814   * Retrieves attached file path based on attachment ID.
 815   *
 816   * By default the path will go through the {@see 'get_attached_file'} filter, but
 817   * passing `true` to the `$unfiltered` argument will return the file path unfiltered.
 818   *
 819   * The function works by retrieving the `_wp_attached_file` post meta value.
 820   * This is a convenience function to prevent looking up the meta name and provide
 821   * a mechanism for sending the attached filename through a filter.
 822   *
 823   * @since 2.0.0
 824   *
 825   * @param int  $attachment_id Attachment ID.
 826   * @param bool $unfiltered    Optional. Whether to skip the {@see 'get_attached_file'} filter.
 827   *                            Default false.
 828   * @return string|false The file path to where the attached file should be, false otherwise.
 829   */
 830  function get_attached_file( $attachment_id, $unfiltered = false ) {
 831      $file = get_post_meta( $attachment_id, '_wp_attached_file', true );
 832  
 833      // If the file is relative, prepend upload dir.
 834      if ( $file && ! str_starts_with( $file, '/' ) && ! preg_match( '|^.:\\\|', $file ) ) {
 835          $uploads = wp_get_upload_dir();
 836          if ( false === $uploads['error'] ) {
 837              $file = $uploads['basedir'] . "/$file";
 838          }
 839      }
 840  
 841      if ( $unfiltered ) {
 842          return $file;
 843      }
 844  
 845      /**
 846       * Filters the attached file based on the given ID.
 847       *
 848       * @since 2.1.0
 849       *
 850       * @param string|false $file          The file path to where the attached file should be, false otherwise.
 851       * @param int          $attachment_id Attachment ID.
 852       */
 853      return apply_filters( 'get_attached_file', $file, $attachment_id );
 854  }
 855  
 856  /**
 857   * Updates attachment file path based on attachment ID.
 858   *
 859   * Used to update the file path of the attachment, which uses post meta name
 860   * `_wp_attached_file` to store the path of the attachment.
 861   *
 862   * @since 2.1.0
 863   *
 864   * @param int    $attachment_id Attachment ID.
 865   * @param string $file          File path for the attachment.
 866   * @return int|bool Meta ID if the `_wp_attached_file` key didn't exist for the attachment.
 867   *                  True on successful update, false on failure or if the `$file` value passed
 868   *                  to the function is the same as the one that is already in the database.
 869   */
 870  function update_attached_file( $attachment_id, $file ) {
 871      if ( ! get_post( $attachment_id ) ) {
 872          return false;
 873      }
 874  
 875      /**
 876       * Filters the path to the attached file to update.
 877       *
 878       * @since 2.1.0
 879       *
 880       * @param string $file          Path to the attached file to update.
 881       * @param int    $attachment_id Attachment ID.
 882       */
 883      $file = apply_filters( 'update_attached_file', $file, $attachment_id );
 884  
 885      $file = _wp_relative_upload_path( $file );
 886      if ( $file ) {
 887          return update_post_meta( $attachment_id, '_wp_attached_file', $file );
 888      } else {
 889          return delete_post_meta( $attachment_id, '_wp_attached_file' );
 890      }
 891  }
 892  
 893  /**
 894   * Returns relative path to an uploaded file.
 895   *
 896   * The path is relative to the current upload dir.
 897   *
 898   * @since 2.9.0
 899   * @access private
 900   *
 901   * @param string $path Full path to the file.
 902   * @return string Relative path on success, unchanged path on failure.
 903   */
 904  function _wp_relative_upload_path( $path ) {
 905      $new_path = $path;
 906  
 907      $uploads = wp_get_upload_dir();
 908      if ( str_starts_with( $new_path, $uploads['basedir'] ) ) {
 909              $new_path = str_replace( $uploads['basedir'], '', $new_path );
 910              $new_path = ltrim( $new_path, '/' );
 911      }
 912  
 913      /**
 914       * Filters the relative path to an uploaded file.
 915       *
 916       * @since 2.9.0
 917       *
 918       * @param string $new_path Relative path to the file.
 919       * @param string $path     Full path to the file.
 920       */
 921      return apply_filters( '_wp_relative_upload_path', $new_path, $path );
 922  }
 923  
 924  /**
 925   * Retrieves all children of the post parent ID.
 926   *
 927   * Normally, without any enhancements, the children would apply to pages. In the
 928   * context of the inner workings of WordPress, pages, posts, and attachments
 929   * share the same table, so therefore the functionality could apply to any one
 930   * of them. It is then noted that while this function does not work on posts, it
 931   * does not mean that it won't work on posts. It is recommended that you know
 932   * what context you wish to retrieve the children of.
 933   *
 934   * Attachments may also be made the child of a post, so if that is an accurate
 935   * statement (which needs to be verified), it would then be possible to get
 936   * all of the attachments for a post. Attachments have since changed since
 937   * version 2.5, so this is most likely inaccurate, but serves generally as an
 938   * example of what is possible.
 939   *
 940   * The arguments listed as defaults are for this function and also of the
 941   * get_posts() function. The arguments are combined with the get_children defaults
 942   * and are then passed to the get_posts() function, which accepts additional arguments.
 943   * You can replace the defaults in this function, listed below and the additional
 944   * arguments listed in the get_posts() function.
 945   *
 946   * The 'post_parent' is the most important argument and important attention
 947   * needs to be paid to the $args parameter. If you pass either an object or an
 948   * integer (number), then just the 'post_parent' is grabbed and everything else
 949   * is lost. If you don't specify any arguments, then it is assumed that you are
 950   * in The Loop and the post parent will be grabbed for from the current post.
 951   *
 952   * The 'post_parent' argument is the ID to get the children. The 'numberposts'
 953   * is the amount of posts to retrieve that has a default of '-1', which is
 954   * used to get all of the posts. Giving a number higher than 0 will only
 955   * retrieve that amount of posts.
 956   *
 957   * The 'post_type' and 'post_status' arguments can be used to choose what
 958   * criteria of posts to retrieve. The 'post_type' can be anything, but WordPress
 959   * post types are 'post', 'pages', and 'attachments'. The 'post_status'
 960   * argument will accept any post status within the write administration panels.
 961   *
 962   * @since 2.0.0
 963   *
 964   * @see get_posts()
 965   * @todo Check validity of description.
 966   *
 967   * @global WP_Post $post Global post object.
 968   *
 969   * @param mixed  $args   Optional. User defined arguments for replacing the defaults. Default empty.
 970   * @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
 971   *                       correspond to a WP_Post object, an associative array, or a numeric array,
 972   *                       respectively. Default OBJECT.
 973   * @return WP_Post[]|array[]|int[] Array of post objects, arrays, or IDs, depending on `$output`.
 974   */
 975  function get_children( $args = '', $output = OBJECT ) {
 976      $kids = array();
 977      if ( empty( $args ) ) {
 978          if ( isset( $GLOBALS['post'] ) ) {
 979              $args = array( 'post_parent' => (int) $GLOBALS['post']->post_parent );
 980          } else {
 981              return $kids;
 982          }
 983      } elseif ( is_object( $args ) ) {
 984          $args = array( 'post_parent' => (int) $args->post_parent );
 985      } elseif ( is_numeric( $args ) ) {
 986          $args = array( 'post_parent' => (int) $args );
 987      }
 988  
 989      $defaults = array(
 990          'numberposts' => -1,
 991          'post_type'   => 'any',
 992          'post_status' => 'any',
 993          'post_parent' => 0,
 994      );
 995  
 996      $parsed_args = wp_parse_args( $args, $defaults );
 997  
 998      $children = get_posts( $parsed_args );
 999  
1000      if ( ! $children ) {
1001          return $kids;
1002      }
1003  
1004      if ( ! empty( $parsed_args['fields'] ) ) {
1005          return $children;
1006      }
1007  
1008      update_post_cache( $children );
1009  
1010      foreach ( $children as $key => $child ) {
1011          $kids[ $child->ID ] = $children[ $key ];
1012      }
1013  
1014      if ( OBJECT === $output ) {
1015          return $kids;
1016      } elseif ( ARRAY_A === $output ) {
1017          $weeuns = array();
1018          foreach ( (array) $kids as $kid ) {
1019              $weeuns[ $kid->ID ] = get_object_vars( $kids[ $kid->ID ] );
1020          }
1021          return $weeuns;
1022      } elseif ( ARRAY_N === $output ) {
1023          $babes = array();
1024          foreach ( (array) $kids as $kid ) {
1025              $babes[ $kid->ID ] = array_values( get_object_vars( $kids[ $kid->ID ] ) );
1026          }
1027          return $babes;
1028      } else {
1029          return $kids;
1030      }
1031  }
1032  
1033  /**
1034   * Gets extended entry info (<!--more-->).
1035   *
1036   * There should not be any space after the second dash and before the word
1037   * 'more'. There can be text or space(s) after the word 'more', but won't be
1038   * referenced.
1039   *
1040   * The returned array has 'main', 'extended', and 'more_text' keys. Main has the text before
1041   * the `<!--more-->`. The 'extended' key has the content after the
1042   * `<!--more-->` comment. The 'more_text' key has the custom "Read More" text.
1043   *
1044   * @since 1.0.0
1045   *
1046   * @param string $post Post content.
1047   * @return string[] {
1048   *     Extended entry info.
1049   *
1050   *     @type string $main      Content before the more tag.
1051   *     @type string $extended  Content after the more tag.
1052   *     @type string $more_text Custom read more text, or empty string.
1053   * }
1054   */
1055  function get_extended( $post ) {
1056      // Match the new style more links.
1057      if ( preg_match( '/<!--more(.*?)?-->/', $post, $matches ) ) {
1058          list($main, $extended) = explode( $matches[0], $post, 2 );
1059          $more_text             = $matches[1];
1060      } else {
1061          $main      = $post;
1062          $extended  = '';
1063          $more_text = '';
1064      }
1065  
1066      // Leading and trailing whitespace.
1067      $main      = preg_replace( '/^[\s]*(.*)[\s]*$/', '\\1', $main );
1068      $extended  = preg_replace( '/^[\s]*(.*)[\s]*$/', '\\1', $extended );
1069      $more_text = preg_replace( '/^[\s]*(.*)[\s]*$/', '\\1', $more_text );
1070  
1071      return array(
1072          'main'      => $main,
1073          'extended'  => $extended,
1074          'more_text' => $more_text,
1075      );
1076  }
1077  
1078  /**
1079   * Retrieves post data given a post ID or post object.
1080   *
1081   * See sanitize_post() for optional $filter values. Also, the parameter
1082   * `$post`, must be given as a variable, since it is passed by reference.
1083   *
1084   * @since 1.5.1
1085   *
1086   * @global WP_Post $post Global post object.
1087   *
1088   * @param int|WP_Post|null $post   Optional. Post ID or post object. `null`, `false`, `0` and other PHP falsey values
1089   *                                 return the current global post inside the loop. A numerically valid post ID that
1090   *                                 points to a non-existent post returns `null`. Defaults to global $post.
1091   * @param string           $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
1092   *                                 correspond to a WP_Post object, an associative array, or a numeric array,
1093   *                                 respectively. Default OBJECT.
1094   * @param string           $filter Optional. Type of filter to apply. Accepts 'raw', 'edit', 'db',
1095   *                                 or 'display'. Default 'raw'.
1096   * @return WP_Post|array|null Type corresponding to $output on success or null on failure.
1097   *                            When $output is OBJECT, a `WP_Post` instance is returned.
1098   */
1099  function get_post( $post = null, $output = OBJECT, $filter = 'raw' ) {
1100      if ( empty( $post ) && isset( $GLOBALS['post'] ) ) {
1101          $post = $GLOBALS['post'];
1102      }
1103  
1104      if ( $post instanceof WP_Post ) {
1105          $_post = $post;
1106      } elseif ( is_object( $post ) ) {
1107          if ( empty( $post->filter ) ) {
1108              $_post = sanitize_post( $post, 'raw' );
1109              $_post = new WP_Post( $_post );
1110          } elseif ( 'raw' === $post->filter ) {
1111              $_post = new WP_Post( $post );
1112          } else {
1113              $_post = WP_Post::get_instance( $post->ID );
1114          }
1115      } else {
1116          $_post = WP_Post::get_instance( $post );
1117      }
1118  
1119      if ( ! $_post ) {
1120          return null;
1121      }
1122  
1123      $_post = $_post->filter( $filter );
1124  
1125      if ( ARRAY_A === $output ) {
1126          return $_post->to_array();
1127      } elseif ( ARRAY_N === $output ) {
1128          return array_values( $_post->to_array() );
1129      }
1130  
1131      return $_post;
1132  }
1133  
1134  /**
1135   * Retrieves the IDs of the ancestors of a post.
1136   *
1137   * @since 2.5.0
1138   *
1139   * @param int|WP_Post $post Post ID or post object.
1140   * @return int[] Array of ancestor IDs or empty array if there are none.
1141   */
1142  function get_post_ancestors( $post ) {
1143      $post = get_post( $post );
1144  
1145      if ( ! $post || empty( $post->post_parent ) || $post->post_parent === $post->ID ) {
1146          return array();
1147      }
1148  
1149      $ancestors = array();
1150  
1151      $id          = $post->post_parent;
1152      $ancestors[] = $id;
1153  
1154      while ( $ancestor = get_post( $id ) ) {
1155          // Loop detection: If the ancestor has been seen before, break.
1156          if ( empty( $ancestor->post_parent ) || $ancestor->post_parent === $post->ID
1157              || in_array( $ancestor->post_parent, $ancestors, true )
1158          ) {
1159              break;
1160          }
1161  
1162          $id          = $ancestor->post_parent;
1163          $ancestors[] = $id;
1164      }
1165  
1166      return $ancestors;
1167  }
1168  
1169  /**
1170   * Retrieves data from a post field based on Post ID.
1171   *
1172   * Examples of the post field will be, 'post_type', 'post_status', 'post_content',
1173   * etc and based off of the post object property or key names.
1174   *
1175   * The context values are based off of the taxonomy filter functions and
1176   * supported values are found within those functions.
1177   *
1178   * @since 2.3.0
1179   * @since 4.5.0 The `$post` parameter was made optional.
1180   *
1181   * @see sanitize_post_field()
1182   *
1183   * @param string      $field   Post field name.
1184   * @param int|WP_Post $post    Optional. Post ID or post object. Defaults to global $post.
1185   * @param string      $context Optional. How to filter the field. Accepts 'raw', 'edit', 'db',
1186   *                             or 'display'. Default 'display'.
1187   * @return string The value of the post field on success, empty string on failure.
1188   */
1189  function get_post_field( $field, $post = null, $context = 'display' ) {
1190      $post = get_post( $post );
1191  
1192      if ( ! $post ) {
1193          return '';
1194      }
1195  
1196      if ( ! isset( $post->$field ) ) {
1197          return '';
1198      }
1199  
1200      return sanitize_post_field( $field, $post->$field, $post->ID, $context );
1201  }
1202  
1203  /**
1204   * Retrieves the mime type of an attachment based on the ID.
1205   *
1206   * This function can be used with any post type, but it makes more sense with
1207   * attachments.
1208   *
1209   * @since 2.0.0
1210   *
1211   * @param int|WP_Post $post Optional. Post ID or post object. Defaults to global $post.
1212   * @return string|false The mime type on success, false on failure.
1213   */
1214  function get_post_mime_type( $post = null ) {
1215      $post = get_post( $post );
1216  
1217      if ( is_object( $post ) ) {
1218          return $post->post_mime_type;
1219      }
1220  
1221      return false;
1222  }
1223  
1224  /**
1225   * Retrieves the post status based on the post ID.
1226   *
1227   * If the post ID is of an attachment, then the parent post status will be given
1228   * instead.
1229   *
1230   * @since 2.0.0
1231   *
1232   * @param int|WP_Post $post Optional. Post ID or post object. Defaults to global $post.
1233   * @return string|false Post status on success, false on failure.
1234   */
1235  function get_post_status( $post = null ) {
1236      // Normalize the post object if necessary, skip normalization if called from get_sample_permalink().
1237      if ( ! $post instanceof WP_Post || ! isset( $post->filter ) || 'sample' !== $post->filter ) {
1238          $post = get_post( $post );
1239      }
1240  
1241      if ( ! is_object( $post ) ) {
1242          return false;
1243      }
1244  
1245      $post_status = $post->post_status;
1246  
1247      if (
1248          'attachment' === $post->post_type &&
1249          'inherit' === $post_status
1250      ) {
1251          if (
1252              0 === $post->post_parent ||
1253              ! get_post( $post->post_parent ) ||
1254              $post->ID === $post->post_parent
1255          ) {
1256              // Unattached attachments with inherit status are assumed to be published.
1257              $post_status = 'publish';
1258          } elseif ( 'trash' === get_post_status( $post->post_parent ) ) {
1259              // Get parent status prior to trashing.
1260              $post_status = get_post_meta( $post->post_parent, '_wp_trash_meta_status', true );
1261  
1262              if ( ! $post_status ) {
1263                  // Assume publish as above.
1264                  $post_status = 'publish';
1265              }
1266          } else {
1267              $post_status = get_post_status( $post->post_parent );
1268          }
1269      } elseif (
1270          'attachment' === $post->post_type &&
1271          ! in_array( $post_status, array( 'private', 'trash', 'auto-draft' ), true )
1272      ) {
1273          /*
1274           * Ensure uninherited attachments have a permitted status either 'private', 'trash', 'auto-draft'.
1275           * This is to match the logic in wp_insert_post().
1276           *
1277           * Note: 'inherit' is excluded from this check as it is resolved to the parent post's
1278           * status in the logic block above.
1279           */
1280          $post_status = 'publish';
1281      }
1282  
1283      /**
1284       * Filters the post status.
1285       *
1286       * @since 4.4.0
1287       * @since 5.7.0 The attachment post type is now passed through this filter.
1288       *
1289       * @param string  $post_status The post status.
1290       * @param WP_Post $post        The post object.
1291       */
1292      return apply_filters( 'get_post_status', $post_status, $post );
1293  }
1294  
1295  /**
1296   * Retrieves all of the WordPress supported post statuses.
1297   *
1298   * Posts have a limited set of valid status values, this provides the
1299   * post_status values and descriptions.
1300   *
1301   * @since 2.5.0
1302   *
1303   * @return string[] Array of post status labels keyed by their status.
1304   */
1305  function get_post_statuses() {
1306      $status = array(
1307          'draft'   => __( 'Draft' ),
1308          'pending' => __( 'Pending Review' ),
1309          'private' => __( 'Private' ),
1310          'publish' => __( 'Published' ),
1311      );
1312  
1313      return $status;
1314  }
1315  
1316  /**
1317   * Retrieves all of the WordPress support page statuses.
1318   *
1319   * Pages have a limited set of valid status values, this provides the
1320   * post_status values and descriptions.
1321   *
1322   * @since 2.5.0
1323   *
1324   * @return string[] Array of page status labels keyed by their status.
1325   */
1326  function get_page_statuses() {
1327      $status = array(
1328          'draft'   => __( 'Draft' ),
1329          'private' => __( 'Private' ),
1330          'publish' => __( 'Published' ),
1331      );
1332  
1333      return $status;
1334  }
1335  
1336  /**
1337   * Returns statuses for privacy requests.
1338   *
1339   * @since 4.9.6
1340   * @access private
1341   *
1342   * @return string[] Array of privacy request status labels keyed by their status.
1343   */
1344  function _wp_privacy_statuses() {
1345      return array(
1346          'request-pending'   => _x( 'Pending', 'request status' ),      // Pending confirmation from user.
1347          'request-confirmed' => _x( 'Confirmed', 'request status' ),    // User has confirmed the action.
1348          'request-failed'    => _x( 'Failed', 'request status' ),       // User failed to confirm the action.
1349          'request-completed' => _x( 'Completed', 'request status' ),    // Admin has handled the request.
1350      );
1351  }
1352  
1353  /**
1354   * Registers a post status. Do not use before init.
1355   *
1356   * A simple function for creating or modifying a post status based on the
1357   * parameters given. The function will accept an array (second optional
1358   * parameter), along with a string for the post status name.
1359   *
1360   * Arguments prefixed with an _underscore shouldn't be used by plugins and themes.
1361   *
1362   * @since 3.0.0
1363   *
1364   * @global stdClass[] $wp_post_statuses Inserts new post status object into the list
1365   *
1366   * @param string       $post_status Name of the post status.
1367   * @param array|string $args {
1368   *     Optional. Array or string of post status arguments.
1369   *
1370   *     @type bool|string $label                     A descriptive name for the post status marked
1371   *                                                  for translation. Defaults to value of $post_status.
1372   *     @type array|false $label_count               Nooped plural text from _n_noop() to provide the singular
1373   *                                                  and plural forms of the label for counts. Default false
1374   *                                                  which means the `$label` argument will be used for both
1375   *                                                  the singular and plural forms of this label.
1376   *     @type bool        $exclude_from_search       Whether to exclude posts with this post status
1377   *                                                  from search results. Default is value of $internal.
1378   *     @type bool        $_builtin                  Whether the status is built-in. Core-use only.
1379   *                                                  Default false.
1380   *     @type bool        $public                    Whether posts of this status should be shown
1381   *                                                  in the front end of the site. Default false.
1382   *     @type bool        $internal                  Whether the status is for internal use only.
1383   *                                                  Default false.
1384   *     @type bool        $protected                 Whether posts with this status should be protected.
1385   *                                                  Default false.
1386   *     @type bool        $private                   Whether posts with this status should be private.
1387   *                                                  Default false.
1388   *     @type bool        $publicly_queryable        Whether posts with this status should be publicly-
1389   *                                                  queryable. Default is value of $public.
1390   *     @type bool        $show_in_admin_all_list    Whether to include posts in the edit listing for
1391   *                                                  their post type. Default is the opposite value
1392   *                                                  of $internal.
1393   *     @type bool        $show_in_admin_status_list Show in the list of statuses with post counts at
1394   *                                                  the top of the edit listings,
1395   *                                                  e.g. All (12) | Published (9) | My Custom Status (2)
1396   *                                                  Default is the opposite value of $internal.
1397   *     @type bool        $date_floating             Whether the post has a floating creation date.
1398   *                                                  Default to false.
1399   * }
1400   * @return object
1401   */
1402  function register_post_status( $post_status, $args = array() ) {
1403      global $wp_post_statuses;
1404  
1405      if ( ! is_array( $wp_post_statuses ) ) {
1406          $wp_post_statuses = array();
1407      }
1408  
1409      // Args prefixed with an underscore are reserved for internal use.
1410      $defaults = array(
1411          'label'                     => false,
1412          'label_count'               => false,
1413          'exclude_from_search'       => null,
1414          '_builtin'                  => false,
1415          'public'                    => null,
1416          'internal'                  => null,
1417          'protected'                 => null,
1418          'private'                   => null,
1419          'publicly_queryable'        => null,
1420          'show_in_admin_status_list' => null,
1421          'show_in_admin_all_list'    => null,
1422          'date_floating'             => null,
1423      );
1424      $args     = wp_parse_args( $args, $defaults );
1425      $args     = (object) $args;
1426  
1427      $post_status = sanitize_key( $post_status );
1428      $args->name  = $post_status;
1429  
1430      // Set various defaults.
1431      if ( null === $args->public && null === $args->internal && null === $args->protected && null === $args->private ) {
1432          $args->internal = true;
1433      }
1434  
1435      if ( null === $args->public ) {
1436          $args->public = false;
1437      }
1438  
1439      if ( null === $args->private ) {
1440          $args->private = false;
1441      }
1442  
1443      if ( null === $args->protected ) {
1444          $args->protected = false;
1445      }
1446  
1447      if ( null === $args->internal ) {
1448          $args->internal = false;
1449      }
1450  
1451      if ( null === $args->publicly_queryable ) {
1452          $args->publicly_queryable = $args->public;
1453      }
1454  
1455      if ( null === $args->exclude_from_search ) {
1456          $args->exclude_from_search = $args->internal;
1457      }
1458  
1459      if ( null === $args->show_in_admin_all_list ) {
1460          $args->show_in_admin_all_list = ! $args->internal;
1461      }
1462  
1463      if ( null === $args->show_in_admin_status_list ) {
1464          $args->show_in_admin_status_list = ! $args->internal;
1465      }
1466  
1467      if ( null === $args->date_floating ) {
1468          $args->date_floating = false;
1469      }
1470  
1471      if ( false === $args->label ) {
1472          $args->label = $post_status;
1473      }
1474  
1475      if ( false === $args->label_count ) {
1476          // phpcs:ignore WordPress.WP.I18n.NonSingularStringLiteralSingular,WordPress.WP.I18n.NonSingularStringLiteralPlural
1477          $args->label_count = _n_noop( $args->label, $args->label );
1478      }
1479  
1480      $wp_post_statuses[ $post_status ] = $args;
1481  
1482      return $args;
1483  }
1484  
1485  /**
1486   * Retrieves a post status object by name.
1487   *
1488   * @since 3.0.0
1489   *
1490   * @global stdClass[] $wp_post_statuses List of post statuses.
1491   *
1492   * @see register_post_status()
1493   *
1494   * @param string $post_status The name of a registered post status.
1495   * @return stdClass|null A post status object.
1496   */
1497  function get_post_status_object( $post_status ) {
1498      global $wp_post_statuses;
1499  
1500      if ( empty( $wp_post_statuses[ $post_status ] ) ) {
1501          return null;
1502      }
1503  
1504      return $wp_post_statuses[ $post_status ];
1505  }
1506  
1507  /**
1508   * Gets a list of post statuses.
1509   *
1510   * @since 3.0.0
1511   *
1512   * @global stdClass[] $wp_post_statuses List of post statuses.
1513   *
1514   * @see register_post_status()
1515   *
1516   * @param array|string $args     Optional. Array or string of post status arguments to compare against
1517   *                               properties of the global `$wp_post_statuses objects`. Default empty array.
1518   * @param string       $output   Optional. The type of output to return, either 'names' or 'objects'. Default 'names'.
1519   * @param string       $operator Optional. The logical operation to perform. 'or' means only one element
1520   *                               from the array needs to match; 'and' means all elements must match.
1521   *                               Default 'and'.
1522   * @return string[]|stdClass[] A list of post status names or objects.
1523   */
1524  function get_post_stati( $args = array(), $output = 'names', $operator = 'and' ) {
1525      global $wp_post_statuses;
1526  
1527      $field = ( 'names' === $output ) ? 'name' : false;
1528  
1529      return wp_filter_object_list( $wp_post_statuses, $args, $operator, $field );
1530  }
1531  
1532  /**
1533   * Determines whether the post type is hierarchical.
1534   *
1535   * A false return value might also mean that the post type does not exist.
1536   *
1537   * @since 3.0.0
1538   *
1539   * @see get_post_type_object()
1540   *
1541   * @param string $post_type Post type name
1542   * @return bool Whether post type is hierarchical.
1543   */
1544  function is_post_type_hierarchical( $post_type ) {
1545      if ( ! post_type_exists( $post_type ) ) {
1546          return false;
1547      }
1548  
1549      $post_type = get_post_type_object( $post_type );
1550      return $post_type->hierarchical;
1551  }
1552  
1553  /**
1554   * Determines whether a post type is registered.
1555   *
1556   * For more information on this and similar theme functions, check out
1557   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
1558   * Conditional Tags} article in the Theme Developer Handbook.
1559   *
1560   * @since 3.0.0
1561   *
1562   * @see get_post_type_object()
1563   *
1564   * @param string $post_type Post type name.
1565   * @return bool Whether post type is registered.
1566   */
1567  function post_type_exists( $post_type ) {
1568      return (bool) get_post_type_object( $post_type );
1569  }
1570  
1571  /**
1572   * Retrieves the post type of the current post or of a given post.
1573   *
1574   * @since 2.1.0
1575   *
1576   * @param int|WP_Post|null $post Optional. Post ID or post object. Default is global $post.
1577   * @return string|false          Post type on success, false on failure.
1578   */
1579  function get_post_type( $post = null ) {
1580      $post = get_post( $post );
1581      if ( $post ) {
1582          return $post->post_type;
1583      }
1584  
1585      return false;
1586  }
1587  
1588  /**
1589   * Retrieves a post type object by name.
1590   *
1591   * @since 3.0.0
1592   * @since 4.6.0 Object returned is now an instance of `WP_Post_Type`.
1593   *
1594   * @global array $wp_post_types List of post types.
1595   *
1596   * @see register_post_type()
1597   *
1598   * @param string $post_type The name of a registered post type.
1599   * @return WP_Post_Type|null WP_Post_Type object if it exists, null otherwise.
1600   */
1601  function get_post_type_object( $post_type ) {
1602      global $wp_post_types;
1603  
1604      if ( ! is_scalar( $post_type ) || empty( $wp_post_types[ $post_type ] ) ) {
1605          return null;
1606      }
1607  
1608      return $wp_post_types[ $post_type ];
1609  }
1610  
1611  /**
1612   * Gets a list of all registered post type objects.
1613   *
1614   * @since 2.9.0
1615   *
1616   * @global array $wp_post_types List of post types.
1617   *
1618   * @see register_post_type() for accepted arguments.
1619   *
1620   * @param array|string $args     Optional. An array of key => value arguments to match against
1621   *                               the post type objects. Default empty array.
1622   * @param string       $output   Optional. The type of output to return. Either 'names'
1623   *                               or 'objects'. Default 'names'.
1624   * @param string       $operator Optional. The logical operation to perform. 'or' means only one
1625   *                               element from the array needs to match; 'and' means all elements
1626   *                               must match; 'not' means no elements may match. Default 'and'.
1627   * @return string[]|WP_Post_Type[] An array of post type names or objects.
1628   */
1629  function get_post_types( $args = array(), $output = 'names', $operator = 'and' ) {
1630      global $wp_post_types;
1631  
1632      $field = ( 'names' === $output ) ? 'name' : false;
1633  
1634      return wp_filter_object_list( $wp_post_types, $args, $operator, $field );
1635  }
1636  
1637  /**
1638   * Registers a post type.
1639   *
1640   * Note: Post type registrations should not be hooked before the
1641   * {@see 'init'} action. Also, any taxonomy connections should be
1642   * registered via the `$taxonomies` argument to ensure consistency
1643   * when hooks such as {@see 'parse_query'} or {@see 'pre_get_posts'}
1644   * are used.
1645   *
1646   * Post types can support any number of built-in core features such
1647   * as meta boxes, custom fields, post thumbnails, post statuses,
1648   * comments, and more. See the `$supports` argument for a complete
1649   * list of supported features.
1650   *
1651   * @since 2.9.0
1652   * @since 3.0.0 The `show_ui` argument is now enforced on the new post screen.
1653   * @since 4.4.0 The `show_ui` argument is now enforced on the post type listing
1654   *              screen and post editing screen.
1655   * @since 4.6.0 Post type object returned is now an instance of `WP_Post_Type`.
1656   * @since 4.7.0 Introduced `show_in_rest`, `rest_base` and `rest_controller_class`
1657   *              arguments to register the post type in REST API.
1658   * @since 5.0.0 The `template` and `template_lock` arguments were added.
1659   * @since 5.3.0 The `supports` argument will now accept an array of arguments for a feature.
1660   * @since 5.9.0 The `rest_namespace` argument was added.
1661   *
1662   * @global array $wp_post_types List of post types.
1663   *
1664   * @param string       $post_type Post type key. Must not exceed 20 characters and may only contain
1665   *                                lowercase alphanumeric characters, dashes, and underscores. See sanitize_key().
1666   * @param array|string $args {
1667   *     Array or string of arguments for registering a post type.
1668   *
1669   *     @type string       $label                           Name of the post type shown in the menu. Usually plural.
1670   *                                                         Default is value of $labels['name'].
1671   *     @type string[]     $labels                          An array of labels for this post type. If not set, post
1672   *                                                         labels are inherited for non-hierarchical types and page
1673   *                                                         labels for hierarchical ones. See get_post_type_labels() for a full
1674   *                                                         list of supported labels.
1675   *     @type string       $description                     A short descriptive summary of what the post type is.
1676   *                                                         Default empty.
1677   *     @type bool         $public                          Whether a post type is intended for use publicly either via
1678   *                                                         the admin interface or by front-end users. While the default
1679   *                                                         settings of $exclude_from_search, $publicly_queryable, $show_ui,
1680   *                                                         and $show_in_nav_menus are inherited from $public, each does not
1681   *                                                         rely on this relationship and controls a very specific intention.
1682   *                                                         Default false.
1683   *     @type bool         $hierarchical                    Whether the post type is hierarchical (e.g. page). Default false.
1684   *     @type bool         $exclude_from_search             Whether to exclude posts with this post type from front end search
1685   *                                                         results. Default is the opposite value of $public.
1686   *     @type bool         $publicly_queryable              Whether queries can be performed on the front end for the post type
1687   *                                                         as part of parse_request(). Endpoints would include:
1688   *                                                          * ?post_type={post_type_key}
1689   *                                                          * ?{post_type_key}={single_post_slug}
1690   *                                                          * ?{post_type_query_var}={single_post_slug}
1691   *                                                         If not set, the default is inherited from $public.
1692   *     @type bool         $show_ui                         Whether to generate and allow a UI for managing this post type in the
1693   *                                                         admin. Default is value of $public.
1694   *     @type bool|string  $show_in_menu                    Where to show the post type in the admin menu. To work, $show_ui
1695   *                                                         must be true. If true, the post type is shown in its own top level
1696   *                                                         menu. If false, no menu is shown. If a string of an existing top
1697   *                                                         level menu ('tools.php' or 'edit.php?post_type=page', for example), the
1698   *                                                         post type will be placed as a sub-menu of that.
1699   *                                                         Default is value of $show_ui.
1700   *     @type bool         $show_in_nav_menus               Makes this post type available for selection in navigation menus.
1701   *                                                         Default is value of $public.
1702   *     @type bool         $show_in_admin_bar               Makes this post type available via the admin bar. Default is value
1703   *                                                         of $show_in_menu.
1704   *     @type bool         $show_in_rest                    Whether to include the post type in the REST API. Set this to true
1705   *                                                         for the post type to be available in the block editor.
1706   *     @type string       $rest_base                       To change the base URL of REST API route. Default is $post_type.
1707   *     @type string       $rest_namespace                  To change the namespace URL of REST API route. Default is wp/v2.
1708   *     @type string       $rest_controller_class           REST API controller class name. Default is 'WP_REST_Posts_Controller'.
1709   *     @type string|bool  $autosave_rest_controller_class  REST API controller class name. Default is 'WP_REST_Autosaves_Controller'.
1710   *     @type string|bool  $revisions_rest_controller_class REST API controller class name. Default is 'WP_REST_Revisions_Controller'.
1711   *     @type bool         $late_route_registration         A flag to direct the REST API controllers for autosave / revisions
1712   *                                                         should be registered before/after the post type controller.
1713   *     @type int          $menu_position                   The position in the menu order the post type should appear. To work,
1714   *                                                         $show_in_menu must be true. Default null (at the bottom).
1715   *     @type string       $menu_icon                       The URL to the icon to be used for this menu. Pass a base64-encoded
1716   *                                                         SVG using a data URI, which will be colored to match the color scheme
1717   *                                                         -- this should begin with 'data:image/svg+xml;base64,'. Pass the name
1718   *                                                         of a Dashicons helper class to use a font icon, e.g.
1719   *                                                        'dashicons-chart-pie'. Pass 'none' to leave div.wp-menu-image empty
1720   *                                                         so an icon can be added via CSS. Defaults to use the posts icon.
1721   *     @type string|array $capability_type                 The string to use to build the read, edit, and delete capabilities.
1722   *                                                         May be passed as an array to allow for alternative plurals when using
1723   *                                                         this argument as a base to construct the capabilities, e.g.
1724   *                                                         array('story', 'stories'). Default 'post'.
1725   *     @type string[]     $capabilities                    Array of capabilities for this post type. $capability_type is used
1726   *                                                         as a base to construct capabilities by default.
1727   *                                                         See get_post_type_capabilities().
1728   *     @type bool         $map_meta_cap                    Whether to use the internal default meta capability handling.
1729   *                                                         Default false.
1730   *     @type array|false  $supports                        Core feature(s) the post type supports. Serves as an alias for calling
1731   *                                                         add_post_type_support() directly. Core features include 'title',
1732   *                                                         'editor', 'comments', 'revisions', 'trackbacks', 'author', 'excerpt',
1733   *                                                         'page-attributes', 'thumbnail', 'custom-fields', and 'post-formats'.
1734   *                                                         Additionally, the 'revisions' feature dictates whether the post type
1735   *                                                         will store revisions, the 'autosave' feature dictates whether the post type
1736   *                                                         will be autosaved, and the 'comments' feature dictates whether the
1737   *                                                         comments count will show on the edit screen. For backward compatibility reasons,
1738   *                                                         adding 'editor' support implies 'autosave' support too. A feature can also be
1739   *                                                         specified as an array of arguments to provide additional information
1740   *                                                         about supporting that feature.
1741   *                                                         Example: `array( 'my_feature', array( 'field' => 'value' ) )`.
1742   *                                                         If false, no features will be added.
1743   *                                                         Default is an array containing 'title' and 'editor'.
1744   *     @type callable     $register_meta_box_cb            Provide a callback function that sets up the meta boxes for the
1745   *                                                         edit form. Do remove_meta_box() and add_meta_box() calls in the
1746   *                                                         callback. Default null.
1747   *     @type string[]     $taxonomies                      An array of taxonomy identifiers that will be registered for the
1748   *                                                         post type. Taxonomies can be registered later with register_taxonomy()
1749   *                                                         or register_taxonomy_for_object_type().
1750   *                                                         Default empty array.
1751   *     @type bool|string  $has_archive                     Whether there should be post type archives, or if a string, the
1752   *                                                         archive slug to use. Will generate the proper rewrite rules if
1753   *                                                         $rewrite is enabled. Default false.
1754   *     @type bool|array   $rewrite                         {
1755   *         Triggers the handling of rewrites for this post type. To prevent rewrite, set to false.
1756   *         Defaults to true, using $post_type as slug. To specify rewrite rules, an array can be
1757   *         passed with any of these keys:
1758   *
1759   *         @type string $slug       Customize the permastruct slug. Defaults to $post_type key.
1760   *         @type bool   $with_front Whether the permastruct should be prepended with WP_Rewrite::$front.
1761   *                                  Default true.
1762   *         @type bool   $feeds      Whether the feed permastruct should be built for this post type.
1763   *                                  Default is value of $has_archive.
1764   *         @type bool   $pages      Whether the permastruct should provide for pagination. Default true.
1765   *         @type int    $ep_mask    Endpoint mask to assign. If not specified and permalink_epmask is set,
1766   *                                  inherits from $permalink_epmask. If not specified and permalink_epmask
1767   *                                  is not set, defaults to EP_PERMALINK.
1768   *     }
1769   *     @type string|bool  $query_var                      Sets the query_var key for this post type. Defaults to $post_type
1770   *                                                        key. If false, a post type cannot be loaded at
1771   *                                                        ?{query_var}={post_slug}. If specified as a string, the query
1772   *                                                        ?{query_var_string}={post_slug} will be valid.
1773   *     @type bool         $can_export                     Whether to allow this post type to be exported. Default true.
1774   *     @type bool         $delete_with_user               Whether to delete posts of this type when deleting a user.
1775   *                                                          * If true, posts of this type belonging to the user will be moved
1776   *                                                            to Trash when the user is deleted.
1777   *                                                          * If false, posts of this type belonging to the user will *not*
1778   *                                                            be trashed or deleted.
1779   *                                                          * If not set (the default), posts are trashed if post type supports
1780   *                                                            the 'author' feature. Otherwise posts are not trashed or deleted.
1781   *                                                        Default null.
1782   *     @type array        $template                       Array of blocks to use as the default initial state for an editor
1783   *                                                        session. Each item should be an array containing block name and
1784   *                                                        optional attributes. Default empty array.
1785   *     @type string|false $template_lock                  Whether the block template should be locked if $template is set.
1786   *                                                        * If set to 'all', the user is unable to insert new blocks,
1787   *                                                          move existing blocks and delete blocks.
1788   *                                                       * If set to 'insert', the user is able to move existing blocks
1789   *                                                         but is unable to insert new blocks and delete blocks.
1790   *                                                         Default false.
1791   *     @type bool         $_builtin                     FOR INTERNAL USE ONLY! True if this post type is a native or
1792   *                                                      "built-in" post_type. Default false.
1793   *     @type string       $_edit_link                   FOR INTERNAL USE ONLY! URL segment to use for edit link of
1794   *                                                      this post type. Default 'post.php?post=%d'.
1795   * }
1796   * @return WP_Post_Type|WP_Error The registered post type object on success,
1797   *                               WP_Error object on failure.
1798   */
1799  function register_post_type( $post_type, $args = array() ) {
1800      global $wp_post_types;
1801  
1802      if ( ! is_array( $wp_post_types ) ) {
1803          $wp_post_types = array();
1804      }
1805  
1806      // Sanitize post type name.
1807      $post_type = sanitize_key( $post_type );
1808  
1809      if ( empty( $post_type ) || strlen( $post_type ) > 20 ) {
1810          _doing_it_wrong( __FUNCTION__, __( 'Post type names must be between 1 and 20 characters in length.' ), '4.2.0' );
1811          return new WP_Error( 'post_type_length_invalid', __( 'Post type names must be between 1 and 20 characters in length.' ) );
1812      }
1813  
1814      $post_type_object = new WP_Post_Type( $post_type, $args );
1815      $post_type_object->add_supports();
1816      $post_type_object->add_rewrite_rules();
1817      $post_type_object->register_meta_boxes();
1818  
1819      $wp_post_types[ $post_type ] = $post_type_object;
1820  
1821      $post_type_object->add_hooks();
1822      $post_type_object->register_taxonomies();
1823  
1824      /**
1825       * Fires after a post type is registered.
1826       *
1827       * @since 3.3.0
1828       * @since 4.6.0 Converted the `$post_type` parameter to accept a `WP_Post_Type` object.
1829       *
1830       * @param string       $post_type        Post type.
1831       * @param WP_Post_Type $post_type_object Arguments used to register the post type.
1832       */
1833      do_action( 'registered_post_type', $post_type, $post_type_object );
1834  
1835      /**
1836       * Fires after a specific post type is registered.
1837       *
1838       * The dynamic portion of the filter name, `$post_type`, refers to the post type key.
1839       *
1840       * Possible hook names include:
1841       *
1842       *  - `registered_post_type_post`
1843       *  - `registered_post_type_page`
1844       *
1845       * @since 6.0.0
1846       *
1847       * @param string       $post_type        Post type.
1848       * @param WP_Post_Type $post_type_object Arguments used to register the post type.
1849       */
1850      do_action( "registered_post_type_{$post_type}", $post_type, $post_type_object );
1851  
1852      return $post_type_object;
1853  }
1854  
1855  /**
1856   * Unregisters a post type.
1857   *
1858   * Cannot be used to unregister built-in post types.
1859   *
1860   * @since 4.5.0
1861   *
1862   * @global array $wp_post_types List of post types.
1863   *
1864   * @param string $post_type Post type to unregister.
1865   * @return true|WP_Error True on success, WP_Error on failure or if the post type doesn't exist.
1866   */
1867  function unregister_post_type( $post_type ) {
1868      global $wp_post_types;
1869  
1870      if ( ! post_type_exists( $post_type ) ) {
1871          return new WP_Error( 'invalid_post_type', __( 'Invalid post type.' ) );
1872      }
1873  
1874      $post_type_object = get_post_type_object( $post_type );
1875  
1876      // Do not allow unregistering internal post types.
1877      if ( $post_type_object->_builtin ) {
1878          return new WP_Error( 'invalid_post_type', __( 'Unregistering a built-in post type is not allowed' ) );
1879      }
1880  
1881      $post_type_object->remove_supports();
1882      $post_type_object->remove_rewrite_rules();
1883      $post_type_object->unregister_meta_boxes();
1884      $post_type_object->remove_hooks();
1885      $post_type_object->unregister_taxonomies();
1886  
1887      unset( $wp_post_types[ $post_type ] );
1888  
1889      /**
1890       * Fires after a post type was unregistered.
1891       *
1892       * @since 4.5.0
1893       *
1894       * @param string $post_type Post type key.
1895       */
1896      do_action( 'unregistered_post_type', $post_type );
1897  
1898      return true;
1899  }
1900  
1901  /**
1902   * Builds an object with all post type capabilities out of a post type object
1903   *
1904   * Post type capabilities use the 'capability_type' argument as a base, if the
1905   * capability is not set in the 'capabilities' argument array or if the
1906   * 'capabilities' argument is not supplied.
1907   *
1908   * The capability_type argument can optionally be registered as an array, with
1909   * the first value being singular and the second plural, e.g. array('story, 'stories')
1910   * Otherwise, an 's' will be added to the value for the plural form. After
1911   * registration, capability_type will always be a string of the singular value.
1912   *
1913   * By default, eight keys are accepted as part of the capabilities array:
1914   *
1915   * - edit_post, read_post, and delete_post are meta capabilities, which are then
1916   *   generally mapped to corresponding primitive capabilities depending on the
1917   *   context, which would be the post being edited/read/deleted and the user or
1918   *   role being checked. Thus these capabilities would generally not be granted
1919   *   directly to users or roles.
1920   *
1921   * - edit_posts - Controls whether objects of this post type can be edited.
1922   * - edit_others_posts - Controls whether objects of this type owned by other users
1923   *   can be edited. If the post type does not support an author, then this will
1924   *   behave like edit_posts.
1925   * - delete_posts - Controls whether objects of this post type can be deleted.
1926   * - publish_posts - Controls publishing objects of this post type.
1927   * - read_private_posts - Controls whether private objects can be read.
1928   *
1929   * These five primitive capabilities are checked in core in various locations.
1930   * There are also six other primitive capabilities which are not referenced
1931   * directly in core, except in map_meta_cap(), which takes the three aforementioned
1932   * meta capabilities and translates them into one or more primitive capabilities
1933   * that must then be checked against the user or role, depending on the context.
1934   *
1935   * - read - Controls whether objects of this post type can be read.
1936   * - delete_private_posts - Controls whether private objects can be deleted.
1937   * - delete_published_posts - Controls whether published objects can be deleted.
1938   * - delete_others_posts - Controls whether objects owned by other users can be
1939   *   can be deleted. If the post type does not support an author, then this will
1940   *   behave like delete_posts.
1941   * - edit_private_posts - Controls whether private objects can be edited.
1942   * - edit_published_posts - Controls whether published objects can be edited.
1943   *
1944   * These additional capabilities are only used in map_meta_cap(). Thus, they are
1945   * only assigned by default if the post type is registered with the 'map_meta_cap'
1946   * argument set to true (default is false).
1947   *
1948   * @since 3.0.0
1949   * @since 5.4.0 'delete_posts' is included in default capabilities.
1950   *
1951   * @see register_post_type()
1952   * @see map_meta_cap()
1953   *
1954   * @param object $args Post type registration arguments.
1955   * @return object Object with all the capabilities as member variables.
1956   */
1957  function get_post_type_capabilities( $args ) {
1958      if ( ! is_array( $args->capability_type ) ) {
1959          $args->capability_type = array( $args->capability_type, $args->capability_type . 's' );
1960      }
1961  
1962      // Singular base for meta capabilities, plural base for primitive capabilities.
1963      list( $singular_base, $plural_base ) = $args->capability_type;
1964  
1965      $default_capabilities = array(
1966          // Meta capabilities.
1967          'edit_post'          => 'edit_' . $singular_base,
1968          'read_post'          => 'read_' . $singular_base,
1969          'delete_post'        => 'delete_' . $singular_base,
1970          // Primitive capabilities used outside of map_meta_cap():
1971          'edit_posts'         => 'edit_' . $plural_base,
1972          'edit_others_posts'  => 'edit_others_' . $plural_base,
1973          'delete_posts'       => 'delete_' . $plural_base,
1974          'publish_posts'      => 'publish_' . $plural_base,
1975          'read_private_posts' => 'read_private_' . $plural_base,
1976      );
1977  
1978      // Primitive capabilities used within map_meta_cap():
1979      if ( $args->map_meta_cap ) {
1980          $default_capabilities_for_mapping = array(
1981              'read'                   => 'read',
1982              'delete_private_posts'   => 'delete_private_' . $plural_base,
1983              'delete_published_posts' => 'delete_published_' . $plural_base,
1984              'delete_others_posts'    => 'delete_others_' . $plural_base,
1985              'edit_private_posts'     => 'edit_private_' . $plural_base,
1986              'edit_published_posts'   => 'edit_published_' . $plural_base,
1987          );
1988          $default_capabilities             = array_merge( $default_capabilities, $default_capabilities_for_mapping );
1989      }
1990  
1991      $capabilities = array_merge( $default_capabilities, $args->capabilities );
1992  
1993      // Post creation capability simply maps to edit_posts by default:
1994      if ( ! isset( $capabilities['create_posts'] ) ) {
1995          $capabilities['create_posts'] = $capabilities['edit_posts'];
1996      }
1997  
1998      // Remember meta capabilities for future reference.
1999      if ( $args->map_meta_cap ) {
2000          _post_type_meta_capabilities( $capabilities );
2001      }
2002  
2003      return (object) $capabilities;
2004  }
2005  
2006  /**
2007   * Stores or returns a list of post type meta caps for map_meta_cap().
2008   *
2009   * @since 3.1.0
2010   * @access private
2011   *
2012   * @global array $post_type_meta_caps Used to store meta capabilities.
2013   *
2014   * @param string[] $capabilities Post type meta capabilities.
2015   */
2016  function _post_type_meta_capabilities( $capabilities = null ) {
2017      global $post_type_meta_caps;
2018  
2019      foreach ( $capabilities as $core => $custom ) {
2020          if ( in_array( $core, array( 'read_post', 'delete_post', 'edit_post' ), true ) ) {
2021              $post_type_meta_caps[ $custom ] = $core;
2022          }
2023      }
2024  }
2025  
2026  /**
2027   * Builds an object with all post type labels out of a post type object.
2028   *
2029   * Accepted keys of the label array in the post type object:
2030   *
2031   * - `name` - General name for the post type, usually plural. The same and overridden
2032   *          by `$post_type_object->label`. Default is 'Posts' / 'Pages'.
2033   * - `singular_name` - Name for one object of this post type. Default is 'Post' / 'Page'.
2034   * - `add_new` - Label for adding a new item. Default is 'Add Post' / 'Add Page'.
2035   * - `add_new_item` - Label for adding a new singular item. Default is 'Add Post' / 'Add Page'.
2036   * - `edit_item` - Label for editing a singular item. Default is 'Edit Post' / 'Edit Page'.
2037   * - `new_item` - Label for the new item page title. Default is 'New Post' / 'New Page'.
2038   * - `view_item` - Label for viewing a singular item. Default is 'View Post' / 'View Page'.
2039   * - `view_items` - Label for viewing post type archives. Default is 'View Posts' / 'View Pages'.
2040   * - `search_items` - Label for searching plural items. Default is 'Search Posts' / 'Search Pages'.
2041   * - `not_found` - Label used when no items are found. Default is 'No posts found' / 'No pages found'.
2042   * - `not_found_in_trash` - Label used when no items are in the Trash. Default is 'No posts found in Trash' /
2043   *                        'No pages found in Trash'.
2044   * - `parent_item_colon` - Label used to prefix parents of hierarchical items. Not used on non-hierarchical
2045   *                       post types. Default is 'Parent Page:'.
2046   * - `all_items` - Label to signify all items in a submenu link. Default is 'All Posts' / 'All Pages'.
2047   * - `archives` - Label for archives in nav menus. Default is 'Post Archives' / 'Page Archives'.
2048   * - `attributes` - Label for the attributes meta box. Default is 'Post Attributes' / 'Page Attributes'.
2049   * - `insert_into_item` - Label for the media frame button. Default is 'Insert into post' / 'Insert into page'.
2050   * - `uploaded_to_this_item` - Label for the media frame filter. Default is 'Uploaded to this post' /
2051   *                           'Uploaded to this page'.
2052   * - `featured_image` - Label for the featured image meta box title. Default is 'Featured image'.
2053   * - `set_featured_image` - Label for setting the featured image. Default is 'Set featured image'.
2054   * - `remove_featured_image` - Label for removing the featured image. Default is 'Remove featured image'.
2055   * - `use_featured_image` - Label in the media frame for using a featured image. Default is 'Use as featured image'.
2056   * - `menu_name` - Label for the menu name. Default is the same as `name`.
2057   * - `filter_items_list` - Label for the table views hidden heading. Default is 'Filter posts list' /
2058   *                       'Filter pages list'.
2059   * - `filter_by_date` - Label for the date filter in list tables. Default is 'Filter by date'.
2060   * - `items_list_navigation` - Label for the table pagination hidden heading. Default is 'Posts list navigation' /
2061   *                           'Pages list navigation'.
2062   * - `items_list` - Label for the table hidden heading. Default is 'Posts list' / 'Pages list'.
2063   * - `item_published` - Label used when an item is published. Default is 'Post published.' / 'Page published.'
2064   * - `item_published_privately` - Label used when an item is published with private visibility.
2065   *                              Default is 'Post published privately.' / 'Page published privately.'
2066   * - `item_reverted_to_draft` - Label used when an item is switched to a draft.
2067   *                            Default is 'Post reverted to draft.' / 'Page reverted to draft.'
2068   * - `item_trashed` - Label used when an item is moved to Trash. Default is 'Post trashed.' / 'Page trashed.'
2069   * - `item_scheduled` - Label used when an item is scheduled for publishing. Default is 'Post scheduled.' /
2070   *                    'Page scheduled.'
2071   * - `item_updated` - Label used when an item is updated. Default is 'Post updated.' / 'Page updated.'
2072   * - `item_link` - Title for a navigation link block variation. Default is 'Post Link' / 'Page Link'.
2073   * - `item_link_description` - Description for a navigation link block variation. Default is 'A link to a post.' /
2074   *                             'A link to a page.'
2075   *
2076   * Above, the first default value is for non-hierarchical post types (like posts)
2077   * and the second one is for hierarchical post types (like pages).
2078   *
2079   * Note: To set labels used in post type admin notices, see the {@see 'post_updated_messages'} filter.
2080   *
2081   * @since 3.0.0
2082   * @since 4.3.0 Added the `featured_image`, `set_featured_image`, `remove_featured_image`,
2083   *              and `use_featured_image` labels.
2084   * @since 4.4.0 Added the `archives`, `insert_into_item`, `uploaded_to_this_item`, `filter_items_list`,
2085   *              `items_list_navigation`, and `items_list` labels.
2086   * @since 4.6.0 Converted the `$post_type` parameter to accept a `WP_Post_Type` object.
2087   * @since 4.7.0 Added the `view_items` and `attributes` labels.
2088   * @since 5.0.0 Added the `item_published`, `item_published_privately`, `item_reverted_to_draft`,
2089   *              `item_scheduled`, and `item_updated` labels.
2090   * @since 5.7.0 Added the `filter_by_date` label.
2091   * @since 5.8.0 Added the `item_link` and `item_link_description` labels.
2092   * @since 6.3.0 Added the `item_trashed` label.
2093   * @since 6.4.0 Changed default values for the `add_new` label to include the type of content.
2094   *              This matches `add_new_item` and provides more context for better accessibility.
2095   * @since 6.6.0 Added the `template_name` label.
2096   * @since 6.7.0 Restored pre-6.4.0 defaults for the `add_new` label and updated documentation.
2097   *              Updated core usage to reference `add_new_item`.
2098   *
2099   * @access private
2100   *
2101   * @param object|WP_Post_Type $post_type_object Post type object.
2102   * @return object Object with all the labels as member variables.
2103   */
2104  function get_post_type_labels( $post_type_object ) {
2105      $nohier_vs_hier_defaults = WP_Post_Type::get_default_labels();
2106  
2107      $nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
2108  
2109      $labels = _get_custom_object_labels( $post_type_object, $nohier_vs_hier_defaults );
2110  
2111      if ( ! isset( $post_type_object->labels->template_name ) && isset( $post_type_object->labels->singular_name ) ) {
2112              /* translators: %s: Post type name. */
2113              $labels->template_name = sprintf( __( 'Single item: %s' ), $post_type_object->labels->singular_name );
2114      }
2115  
2116      $post_type = $post_type_object->name;
2117  
2118      $default_labels = clone $labels;
2119  
2120      /**
2121       * Filters the labels of a specific post type.
2122       *
2123       * The dynamic portion of the hook name, `$post_type`, refers to
2124       * the post type slug.
2125       *
2126       * Possible hook names include:
2127       *
2128       *  - `post_type_labels_post`
2129       *  - `post_type_labels_page`
2130       *  - `post_type_labels_attachment`
2131       *
2132       * @since 3.5.0
2133       *
2134       * @see get_post_type_labels() for the full list of labels.
2135       *
2136       * @param object $labels Object with labels for the post type as member variables.
2137       */
2138      $labels = apply_filters( "post_type_labels_{$post_type}", $labels );
2139  
2140      // Ensure that the filtered labels contain all required default values.
2141      $labels = (object) array_merge( (array) $default_labels, (array) $labels );
2142  
2143      return $labels;
2144  }
2145  
2146  /**
2147   * Builds an object with custom-something object (post type, taxonomy) labels
2148   * out of a custom-something object
2149   *
2150   * @since 3.0.0
2151   * @access private
2152   *
2153   * @param object $data_object             A custom-something object.
2154   * @param array  $nohier_vs_hier_defaults Hierarchical vs non-hierarchical default labels.
2155   * @return object Object containing labels for the given custom-something object.
2156   */
2157  function _get_custom_object_labels( $data_object, $nohier_vs_hier_defaults ) {
2158      $data_object->labels = (array) $data_object->labels;
2159  
2160      if ( isset( $data_object->label ) && empty( $data_object->labels['name'] ) ) {
2161          $data_object->labels['name'] = $data_object->label;
2162      }
2163  
2164      if ( ! isset( $data_object->labels['singular_name'] ) && isset( $data_object->labels['name'] ) ) {
2165          $data_object->labels['singular_name'] = $data_object->labels['name'];
2166      }
2167  
2168      if ( ! isset( $data_object->labels['name_admin_bar'] ) ) {
2169          $data_object->labels['name_admin_bar'] =
2170              isset( $data_object->labels['singular_name'] )
2171              ? $data_object->labels['singular_name']
2172              : $data_object->name;
2173      }
2174  
2175      if ( ! isset( $data_object->labels['menu_name'] ) && isset( $data_object->labels['name'] ) ) {
2176          $data_object->labels['menu_name'] = $data_object->labels['name'];
2177      }
2178  
2179      if ( ! isset( $data_object->labels['all_items'] ) && isset( $data_object->labels['menu_name'] ) ) {
2180          $data_object->labels['all_items'] = $data_object->labels['menu_name'];
2181      }
2182  
2183      if ( ! isset( $data_object->labels['archives'] ) && isset( $data_object->labels['all_items'] ) ) {
2184          $data_object->labels['archives'] = $data_object->labels['all_items'];
2185      }
2186  
2187      $defaults = array();
2188      foreach ( $nohier_vs_hier_defaults as $key => $value ) {
2189          $defaults[ $key ] = $data_object->hierarchical ? $value[1] : $value[0];
2190      }
2191  
2192      $labels              = array_merge( $defaults, $data_object->labels );
2193      $data_object->labels = (object) $data_object->labels;
2194  
2195      return (object) $labels;
2196  }
2197  
2198  /**
2199   * Adds submenus for post types.
2200   *
2201   * @access private
2202   * @since 3.1.0
2203   */
2204  function _add_post_type_submenus() {
2205      foreach ( get_post_types( array( 'show_ui' => true ) ) as $ptype ) {
2206          $ptype_obj = get_post_type_object( $ptype );
2207          // Sub-menus only.
2208          if ( ! $ptype_obj->show_in_menu || true === $ptype_obj->show_in_menu ) {
2209              continue;
2210          }
2211          add_submenu_page( $ptype_obj->show_in_menu, $ptype_obj->labels->name, $ptype_obj->labels->all_items, $ptype_obj->cap->edit_posts, "edit.php?post_type=$ptype" );
2212      }
2213  }
2214  
2215  /**
2216   * Registers support of certain features for a post type.
2217   *
2218   * All core features are directly associated with a functional area of the edit
2219   * screen, such as the editor or a meta box. Features include: 'title', 'editor',
2220   * 'comments', 'revisions', 'trackbacks', 'author', 'excerpt', 'page-attributes',
2221   * 'thumbnail', 'custom-fields', and 'post-formats'.
2222   *
2223   * Additionally, the 'revisions' feature dictates whether the post type will
2224   * store revisions, the 'autosave' feature dictates whether the post type
2225   * will be autosaved, and the 'comments' feature dictates whether the comments
2226   * count will show on the edit screen.
2227   *
2228   * A third, optional parameter can also be passed along with a feature to provide
2229   * additional information about supporting that feature.
2230   *
2231   * Example usage:
2232   *
2233   *     add_post_type_support( 'my_post_type', 'comments' );
2234   *     add_post_type_support( 'my_post_type', array(
2235   *         'author', 'excerpt',
2236   *     ) );
2237   *     add_post_type_support( 'my_post_type', 'my_feature', array(
2238   *         'field' => 'value',
2239   *     ) );
2240   *
2241   * @since 3.0.0
2242   * @since 5.3.0 Formalized the existing and already documented `...$args` parameter
2243   *              by adding it to the function signature.
2244   *
2245   * @global array $_wp_post_type_features
2246   *
2247   * @param string       $post_type The post type for which to add the feature.
2248   * @param string|array $feature   The feature being added, accepts an array of
2249   *                                feature strings or a single string.
2250   * @param mixed        ...$args   Optional extra arguments to pass along with certain features.
2251   */
2252  function add_post_type_support( $post_type, $feature, ...$args ) {
2253      global $_wp_post_type_features;
2254  
2255      $features = (array) $feature;
2256      foreach ( $features as $feature ) {
2257          if ( $args ) {
2258              $_wp_post_type_features[ $post_type ][ $feature ] = $args;
2259          } else {
2260              $_wp_post_type_features[ $post_type ][ $feature ] = true;
2261          }
2262      }
2263  }
2264  
2265  /**
2266   * Removes support for a feature from a post type.
2267   *
2268   * @since 3.0.0
2269   *
2270   * @global array $_wp_post_type_features
2271   *
2272   * @param string $post_type The post type for which to remove the feature.
2273   * @param string $feature   The feature being removed.
2274   */
2275  function remove_post_type_support( $post_type, $feature ) {
2276      global $_wp_post_type_features;
2277  
2278      unset( $_wp_post_type_features[ $post_type ][ $feature ] );
2279  }
2280  
2281  /**
2282   * Gets all the post type features
2283   *
2284   * @since 3.4.0
2285   *
2286   * @global array $_wp_post_type_features
2287   *
2288   * @param string $post_type The post type.
2289   * @return array Post type supports list.
2290   */
2291  function get_all_post_type_supports( $post_type ) {
2292      global $_wp_post_type_features;
2293  
2294      if ( isset( $_wp_post_type_features[ $post_type ] ) ) {
2295          return $_wp_post_type_features[ $post_type ];
2296      }
2297  
2298      return array();
2299  }
2300  
2301  /**
2302   * Checks a post type's support for a given feature.
2303   *
2304   * @since 3.0.0
2305   *
2306   * @global array $_wp_post_type_features
2307   *
2308   * @param string $post_type The post type being checked.
2309   * @param string $feature   The feature being checked.
2310   * @return bool Whether the post type supports the given feature.
2311   */
2312  function post_type_supports( $post_type, $feature ) {
2313      global $_wp_post_type_features;
2314  
2315      return ( isset( $_wp_post_type_features[ $post_type ][ $feature ] ) );
2316  }
2317  
2318  /**
2319   * Retrieves a list of post type names that support a specific feature.
2320   *
2321   * @since 4.5.0
2322   *
2323   * @global array $_wp_post_type_features Post type features
2324   *
2325   * @param array|string $feature  Single feature or an array of features the post types should support.
2326   * @param string       $operator Optional. The logical operation to perform. 'or' means
2327   *                               only one element from the array needs to match; 'and'
2328   *                               means all elements must match; 'not' means no elements may
2329   *                               match. Default 'and'.
2330   * @return string[] A list of post type names.
2331   */
2332  function get_post_types_by_support( $feature, $operator = 'and' ) {
2333      global $_wp_post_type_features;
2334  
2335      $features = array_fill_keys( (array) $feature, true );
2336  
2337      return array_keys( wp_filter_object_list( $_wp_post_type_features, $features, $operator ) );
2338  }
2339  
2340  /**
2341   * Updates the post type for the post ID.
2342   *
2343   * The page or post cache will be cleaned for the post ID.
2344   *
2345   * @since 2.5.0
2346   *
2347   * @global wpdb $wpdb WordPress database abstraction object.
2348   *
2349   * @param int    $post_id   Optional. Post ID to change post type. Default 0.
2350   * @param string $post_type Optional. Post type. Accepts 'post' or 'page' to
2351   *                          name a few. Default 'post'.
2352   * @return int|false Amount of rows changed. Should be 1 for success and 0 for failure.
2353   */
2354  function set_post_type( $post_id = 0, $post_type = 'post' ) {
2355      global $wpdb;
2356  
2357      $post_type = sanitize_post_field( 'post_type', $post_type, $post_id, 'db' );
2358      $return    = $wpdb->update( $wpdb->posts, array( 'post_type' => $post_type ), array( 'ID' => $post_id ) );
2359  
2360      clean_post_cache( $post_id );
2361  
2362      return $return;
2363  }
2364  
2365  /**
2366   * Determines whether a post type is considered "viewable".
2367   *
2368   * For built-in post types such as posts and pages, the 'public' value will be evaluated.
2369   * For all others, the 'publicly_queryable' value will be used.
2370   *
2371   * @since 4.4.0
2372   * @since 4.5.0 Added the ability to pass a post type name in addition to object.
2373   * @since 4.6.0 Converted the `$post_type` parameter to accept a `WP_Post_Type` object.
2374   * @since 5.9.0 Added `is_post_type_viewable` hook to filter the result.
2375   *
2376   * @param string|WP_Post_Type $post_type Post type name or object.
2377   * @return bool Whether the post type should be considered viewable.
2378   */
2379  function is_post_type_viewable( $post_type ) {
2380      if ( is_scalar( $post_type ) ) {
2381          $post_type = get_post_type_object( $post_type );
2382  
2383          if ( ! $post_type ) {
2384              return false;
2385          }
2386      }
2387  
2388      if ( ! is_object( $post_type ) ) {
2389          return false;
2390      }
2391  
2392      $is_viewable = $post_type->publicly_queryable || ( $post_type->_builtin && $post_type->public );
2393  
2394      /**
2395       * Filters whether a post type is considered "viewable".
2396       *
2397       * The returned filtered value must be a boolean type to ensure
2398       * `is_post_type_viewable()` only returns a boolean. This strictness
2399       * is by design to maintain backwards-compatibility and guard against
2400       * potential type errors in PHP 8.1+. Non-boolean values (even falsey
2401       * and truthy values) will result in the function returning false.
2402       *
2403       * @since 5.9.0
2404       *
2405       * @param bool         $is_viewable Whether the post type is "viewable" (strict type).
2406       * @param WP_Post_Type $post_type   Post type object.
2407       */
2408      return true === apply_filters( 'is_post_type_viewable', $is_viewable, $post_type );
2409  }
2410  
2411  /**
2412   * Determines whether a post status is considered "viewable".
2413   *
2414   * For built-in post statuses such as publish and private, the 'public' value will be evaluated.
2415   * For all others, the 'publicly_queryable' value will be used.
2416   *
2417   * @since 5.7.0
2418   * @since 5.9.0 Added `is_post_status_viewable` hook to filter the result.
2419   *
2420   * @param string|stdClass $post_status Post status name or object.
2421   * @return bool Whether the post status should be considered viewable.
2422   */
2423  function is_post_status_viewable( $post_status ) {
2424      if ( is_scalar( $post_status ) ) {
2425          $post_status = get_post_status_object( $post_status );
2426  
2427          if ( ! $post_status ) {
2428              return false;
2429          }
2430      }
2431  
2432      if (
2433          ! is_object( $post_status ) ||
2434          $post_status->internal ||
2435          $post_status->protected
2436      ) {
2437          return false;
2438      }
2439  
2440      $is_viewable = $post_status->publicly_queryable || ( $post_status->_builtin && $post_status->public );
2441  
2442      /**
2443       * Filters whether a post status is considered "viewable".
2444       *
2445       * The returned filtered value must be a boolean type to ensure
2446       * `is_post_status_viewable()` only returns a boolean. This strictness
2447       * is by design to maintain backwards-compatibility and guard against
2448       * potential type errors in PHP 8.1+. Non-boolean values (even falsey
2449       * and truthy values) will result in the function returning false.
2450       *
2451       * @since 5.9.0
2452       *
2453       * @param bool     $is_viewable Whether the post status is "viewable" (strict type).
2454       * @param stdClass $post_status Post status object.
2455       */
2456      return true === apply_filters( 'is_post_status_viewable', $is_viewable, $post_status );
2457  }
2458  
2459  /**
2460   * Determines whether a post is publicly viewable.
2461   *
2462   * Posts are considered publicly viewable if both the post status and post type
2463   * are viewable.
2464   *
2465   * @since 5.7.0
2466   *
2467   * @param int|WP_Post|null $post Optional. Post ID or post object. Defaults to global $post.
2468   * @return bool Whether the post is publicly viewable.
2469   */
2470  function is_post_publicly_viewable( $post = null ) {
2471      $post = get_post( $post );
2472  
2473      if ( ! $post ) {
2474          return false;
2475      }
2476  
2477      $post_type   = get_post_type( $post );
2478      $post_status = get_post_status( $post );
2479  
2480      return is_post_type_viewable( $post_type ) && is_post_status_viewable( $post_status );
2481  }
2482  
2483  /**
2484   * Determines whether a post is embeddable.
2485   *
2486   * @since 6.8.0
2487   *
2488   * @param int|WP_Post|null $post Optional. Post ID or `WP_Post` object. Defaults to global $post.
2489   * @return bool Whether the post should be considered embeddable.
2490   */
2491  function is_post_embeddable( $post = null ) {
2492      $post = get_post( $post );
2493  
2494      if ( ! $post ) {
2495          return false;
2496      }
2497  
2498      $post_type = get_post_type_object( $post->post_type );
2499  
2500      if ( ! $post_type ) {
2501          return false;
2502      }
2503  
2504      $is_embeddable = $post_type->embeddable;
2505  
2506      /**
2507       * Filter whether a post is embeddable.
2508       *
2509       * @since 6.8.0
2510       *
2511       * @param bool    $is_embeddable Whether the post is embeddable.
2512       * @param WP_Post $post          Post object.
2513       */
2514      return apply_filters( 'is_post_embeddable', $is_embeddable, $post );
2515  }
2516  
2517  /**
2518   * Retrieves an array of the latest posts, or posts matching the given criteria.
2519   *
2520   * For more information on the accepted arguments, see the
2521   * {@link https://developer.wordpress.org/reference/classes/wp_query/
2522   * WP_Query} documentation in the Developer Handbook.
2523   *
2524   * The `$ignore_sticky_posts` and `$no_found_rows` arguments are ignored by
2525   * this function and both are set to `true`.
2526   *
2527   * The defaults are as follows:
2528   *
2529   * @since 1.2.0
2530   *
2531   * @see WP_Query
2532   * @see WP_Query::parse_query()
2533   *
2534   * @param array $args {
2535   *     Optional. Arguments to retrieve posts. See WP_Query::parse_query() for all available arguments.
2536   *
2537   *     @type int        $numberposts      Total number of posts to retrieve. Is an alias of `$posts_per_page`
2538   *                                        in WP_Query. Accepts -1 for all. Default 5.
2539   *     @type int|string $category         Category ID or comma-separated list of IDs (this or any children).
2540   *                                        Is an alias of `$cat` in WP_Query. Default 0.
2541   *     @type int[]      $include          An array of post IDs to retrieve, sticky posts will be included.
2542   *                                        Is an alias of `$post__in` in WP_Query. Default empty array.
2543   *     @type int[]      $exclude          An array of post IDs not to retrieve. Default empty array.
2544   *     @type bool       $suppress_filters Whether to suppress filters. Default true.
2545   * }
2546   * @return WP_Post[]|int[] Array of post objects or post IDs.
2547   */
2548  function get_posts( $args = null ) {
2549      $defaults = array(
2550          'numberposts'      => 5,
2551          'category'         => 0,
2552          'orderby'          => 'date',
2553          'order'            => 'DESC',
2554          'include'          => array(),
2555          'exclude'          => array(),
2556          'meta_key'         => '',
2557          'meta_value'       => '',
2558          'post_type'        => 'post',
2559          'suppress_filters' => true,
2560      );
2561  
2562      $parsed_args = wp_parse_args( $args, $defaults );
2563      if ( empty( $parsed_args['post_status'] ) ) {
2564          $parsed_args['post_status'] = ( 'attachment' === $parsed_args['post_type'] ) ? 'inherit' : 'publish';
2565      }
2566      if ( ! empty( $parsed_args['numberposts'] ) && empty( $parsed_args['posts_per_page'] ) ) {
2567          $parsed_args['posts_per_page'] = $parsed_args['numberposts'];
2568      }
2569      if ( ! empty( $parsed_args['category'] ) ) {
2570          $parsed_args['cat'] = $parsed_args['category'];
2571      }
2572      if ( ! empty( $parsed_args['include'] ) ) {
2573          $incposts                      = wp_parse_id_list( $parsed_args['include'] );
2574          $parsed_args['posts_per_page'] = count( $incposts );  // Only the number of posts included.
2575          $parsed_args['post__in']       = $incposts;
2576      } elseif ( ! empty( $parsed_args['exclude'] ) ) {
2577          $parsed_args['post__not_in'] = wp_parse_id_list( $parsed_args['exclude'] );
2578      }
2579  
2580      $parsed_args['ignore_sticky_posts'] = true;
2581      $parsed_args['no_found_rows']       = true;
2582  
2583      $get_posts = new WP_Query();
2584      return $get_posts->query( $parsed_args );
2585  }
2586  
2587  //
2588  // Post meta functions.
2589  //
2590  
2591  /**
2592   * Adds a meta field to the given post.
2593   *
2594   * Post meta data is called "Custom Fields" on the Administration Screen.
2595   *
2596   * @since 1.5.0
2597   *
2598   * @param int    $post_id    Post ID.
2599   * @param string $meta_key   Metadata name.
2600   * @param mixed  $meta_value Metadata value. Arrays and objects are stored as serialized data and
2601   *                           will be returned as the same type when retrieved. Other data types will
2602   *                           be stored as strings in the database:
2603   *                           - false is stored and retrieved as an empty string ('')
2604   *                           - true is stored and retrieved as '1'
2605   *                           - numbers (both integer and float) are stored and retrieved as strings
2606   *                           Must be serializable if non-scalar.
2607   * @param bool   $unique     Optional. Whether the same key should not be added.
2608   *                           Default false.
2609   * @return int|false Meta ID on success, false on failure.
2610   */
2611  function add_post_meta( $post_id, $meta_key, $meta_value, $unique = false ) {
2612      // Make sure meta is added to the post, not a revision.
2613      $the_post = wp_is_post_revision( $post_id );
2614      if ( $the_post ) {
2615          $post_id = $the_post;
2616      }
2617  
2618      return add_metadata( 'post', $post_id, $meta_key, $meta_value, $unique );
2619  }
2620  
2621  /**
2622   * Deletes a post meta field for the given post ID.
2623   *
2624   * You can match based on the key, or key and value. Removing based on key and
2625   * value, will keep from removing duplicate metadata with the same key. It also
2626   * allows removing all metadata matching the key, if needed.
2627   *
2628   * @since 1.5.0
2629   *
2630   * @param int    $post_id    Post ID.
2631   * @param string $meta_key   Metadata name.
2632   * @param mixed  $meta_value Optional. Metadata value. If provided,
2633   *                           rows will only be removed that match the value.
2634   *                           Must be serializable if non-scalar. Default empty.
2635   * @return bool True on success, false on failure.
2636   */
2637  function delete_post_meta( $post_id, $meta_key, $meta_value = '' ) {
2638      // Make sure meta is deleted from the post, not from a revision.
2639      $the_post = wp_is_post_revision( $post_id );
2640      if ( $the_post ) {
2641          $post_id = $the_post;
2642      }
2643  
2644      return delete_metadata( 'post', $post_id, $meta_key, $meta_value );
2645  }
2646  
2647  /**
2648   * Retrieves a post meta field for the given post ID.
2649   *
2650   * @since 1.5.0
2651   *
2652   * @param int    $post_id Post ID.
2653   * @param string $key     Optional. The meta key to retrieve. By default,
2654   *                        returns data for all keys. Default empty.
2655   * @param bool   $single  Optional. Whether to return a single value.
2656   *                        This parameter has no effect if `$key` is not specified.
2657   *                        Default false.
2658   * @return mixed An array of values if `$single` is false.
2659   *               The value of the meta field if `$single` is true.
2660   *               False for an invalid `$post_id` (non-numeric, zero, or negative value).
2661   *               An empty array if a valid but non-existing post ID is passed and `$single` is false.
2662   *               An empty string if a valid but non-existing post ID is passed and `$single` is true.
2663   *               Note: Non-serialized values are returned as strings:
2664   *               - false values are returned as empty strings ('')
2665   *               - true values are returned as '1'
2666   *               - numbers (both integer and float) are returned as strings
2667   *               Arrays and objects retain their original type.
2668   */
2669  function get_post_meta( $post_id, $key = '', $single = false ) {
2670      return get_metadata( 'post', $post_id, $key, $single );
2671  }
2672  
2673  /**
2674   * Updates a post meta field based on the given post ID.
2675   *
2676   * Use the `$prev_value` parameter to differentiate between meta fields with the
2677   * same key and post ID.
2678   *
2679   * If the meta field for the post does not exist, it will be added and its ID returned.
2680   *
2681   * Can be used in place of add_post_meta().
2682   *
2683   * @since 1.5.0
2684   *
2685   * @param int    $post_id    Post ID.
2686   * @param string $meta_key   Metadata key.
2687   * @param mixed  $meta_value Metadata value. Must be serializable if non-scalar.
2688   * @param mixed  $prev_value Optional. Previous value to check before updating.
2689   *                           If specified, only update existing metadata entries with
2690   *                           this value. Otherwise, update all entries. Default empty.
2691   * @return int|bool Meta ID if the key didn't exist, true on successful update,
2692   *                  false on failure or if the value passed to the function
2693   *                  is the same as the one that is already in the database.
2694   */
2695  function update_post_meta( $post_id, $meta_key, $meta_value, $prev_value = '' ) {
2696      // Make sure meta is updated for the post, not for a revision.
2697      $the_post = wp_is_post_revision( $post_id );
2698      if ( $the_post ) {
2699          $post_id = $the_post;
2700      }
2701  
2702      return update_metadata( 'post', $post_id, $meta_key, $meta_value, $prev_value );
2703  }
2704  
2705  /**
2706   * Deletes everything from post meta matching the given meta key.
2707   *
2708   * @since 2.3.0
2709   *
2710   * @param string $post_meta_key Key to search for when deleting.
2711   * @return bool Whether the post meta key was deleted from the database.
2712   */
2713  function delete_post_meta_by_key( $post_meta_key ) {
2714      return delete_metadata( 'post', null, $post_meta_key, '', true );
2715  }
2716  
2717  /**
2718   * Registers a meta key for posts.
2719   *
2720   * @since 4.9.8
2721   *
2722   * @param string $post_type Post type to register a meta key for. Pass an empty string
2723   *                          to register the meta key across all existing post types.
2724   * @param string $meta_key  The meta key to register.
2725   * @param array  $args      Data used to describe the meta key when registered. See
2726   *                          {@see register_meta()} for a list of supported arguments.
2727   * @return bool True if the meta key was successfully registered, false if not.
2728   */
2729  function register_post_meta( $post_type, $meta_key, array $args ) {
2730      $args['object_subtype'] = $post_type;
2731  
2732      return register_meta( 'post', $meta_key, $args );
2733  }
2734  
2735  /**
2736   * Unregisters a meta key for posts.
2737   *
2738   * @since 4.9.8
2739   *
2740   * @param string $post_type Post type the meta key is currently registered for. Pass
2741   *                          an empty string if the meta key is registered across all
2742   *                          existing post types.
2743   * @param string $meta_key  The meta key to unregister.
2744   * @return bool True on success, false if the meta key was not previously registered.
2745   */
2746  function unregister_post_meta( $post_type, $meta_key ) {
2747      return unregister_meta_key( 'post', $meta_key, $post_type );
2748  }
2749  
2750  /**
2751   * Retrieves post meta fields, based on post ID.
2752   *
2753   * The post meta fields are retrieved from the cache where possible,
2754   * so the function is optimized to be called more than once.
2755   *
2756   * @since 1.2.0
2757   *
2758   * @param int $post_id Optional. Post ID. Default is the ID of the global `$post`.
2759   * @return mixed An array of values.
2760   *               False for an invalid `$post_id` (non-numeric, zero, or negative value).
2761   *               An empty string if a valid but non-existing post ID is passed.
2762   */
2763  function get_post_custom( $post_id = 0 ) {
2764      $post_id = absint( $post_id );
2765  
2766      if ( ! $post_id ) {
2767          $post_id = get_the_ID();
2768      }
2769  
2770      return get_post_meta( $post_id );
2771  }
2772  
2773  /**
2774   * Retrieves meta field names for a post.
2775   *
2776   * If there are no meta fields, then nothing (null) will be returned.
2777   *
2778   * @since 1.2.0
2779   *
2780   * @param int $post_id Optional. Post ID. Default is the ID of the global `$post`.
2781   * @return array|void Array of the keys, if retrieved.
2782   */
2783  function get_post_custom_keys( $post_id = 0 ) {
2784      $custom = get_post_custom( $post_id );
2785  
2786      if ( ! is_array( $custom ) ) {
2787          return;
2788      }
2789  
2790      $keys = array_keys( $custom );
2791      if ( $keys ) {
2792          return $keys;
2793      }
2794  }
2795  
2796  /**
2797   * Retrieves values for a custom post field.
2798   *
2799   * The parameters must not be considered optional. All of the post meta fields
2800   * will be retrieved and only the meta field key values returned.
2801   *
2802   * @since 1.2.0
2803   *
2804   * @param string $key     Optional. Meta field key. Default empty.
2805   * @param int    $post_id Optional. Post ID. Default is the ID of the global `$post`.
2806   * @return array|null Meta field values.
2807   */
2808  function get_post_custom_values( $key = '', $post_id = 0 ) {
2809      if ( ! $key ) {
2810          return null;
2811      }
2812  
2813      $custom = get_post_custom( $post_id );
2814  
2815      return isset( $custom[ $key ] ) ? $custom[ $key ] : null;
2816  }
2817  
2818  /**
2819   * Determines whether a post is sticky.
2820   *
2821   * Sticky posts should remain at the top of The Loop. If the post ID is not
2822   * given, then The Loop ID for the current post will be used.
2823   *
2824   * For more information on this and similar theme functions, check out
2825   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
2826   * Conditional Tags} article in the Theme Developer Handbook.
2827   *
2828   * @since 2.7.0
2829   *
2830   * @param int $post_id Optional. Post ID. Default is the ID of the global `$post`.
2831   * @return bool Whether post is sticky.
2832   */
2833  function is_sticky( $post_id = 0 ) {
2834      $post_id = absint( $post_id );
2835  
2836      if ( ! $post_id ) {
2837          $post_id = get_the_ID();
2838      }
2839  
2840      $stickies = get_option( 'sticky_posts' );
2841  
2842      if ( is_array( $stickies ) ) {
2843          $stickies  = array_map( 'intval', $stickies );
2844          $is_sticky = in_array( $post_id, $stickies, true );
2845      } else {
2846          $is_sticky = false;
2847      }
2848  
2849      /**
2850       * Filters whether a post is sticky.
2851       *
2852       * @since 5.3.0
2853       *
2854       * @param bool $is_sticky Whether a post is sticky.
2855       * @param int  $post_id   Post ID.
2856       */
2857      return apply_filters( 'is_sticky', $is_sticky, $post_id );
2858  }
2859  
2860  /**
2861   * Sanitizes every post field.
2862   *
2863   * If the context is 'raw', then the post object or array will get minimal
2864   * sanitization of the integer fields.
2865   *
2866   * @since 2.3.0
2867   *
2868   * @see sanitize_post_field()
2869   *
2870   * @param object|WP_Post|array $post    The post object or array
2871   * @param string               $context Optional. How to sanitize post fields.
2872   *                                      Accepts 'raw', 'edit', 'db', 'display',
2873   *                                      'attribute', or 'js'. Default 'display'.
2874   * @return object|WP_Post|array The now sanitized post object or array (will be the
2875   *                              same type as `$post`).
2876   */
2877  function sanitize_post( $post, $context = 'display' ) {
2878      if ( is_object( $post ) ) {
2879          // Check if post already filtered for this context.
2880          if ( isset( $post->filter ) && $context === $post->filter ) {
2881              return $post;
2882          }
2883          if ( ! isset( $post->ID ) ) {
2884              $post->ID = 0;
2885          }
2886          foreach ( array_keys( get_object_vars( $post ) ) as $field ) {
2887              $post->$field = sanitize_post_field( $field, $post->$field, $post->ID, $context );
2888          }
2889          $post->filter = $context;
2890      } elseif ( is_array( $post ) ) {
2891          // Check if post already filtered for this context.
2892          if ( isset( $post['filter'] ) && $context === $post['filter'] ) {
2893              return $post;
2894          }
2895          if ( ! isset( $post['ID'] ) ) {
2896              $post['ID'] = 0;
2897          }
2898          foreach ( array_keys( $post ) as $field ) {
2899              $post[ $field ] = sanitize_post_field( $field, $post[ $field ], $post['ID'], $context );
2900          }
2901          $post['filter'] = $context;
2902      }
2903      return $post;
2904  }
2905  
2906  /**
2907   * Sanitizes a post field based on context.
2908   *
2909   * Possible context values are:  'raw', 'edit', 'db', 'display', 'attribute' and
2910   * 'js'. The 'display' context is used by default. 'attribute' and 'js' contexts
2911   * are treated like 'display' when calling filters.
2912   *
2913   * @since 2.3.0
2914   * @since 4.4.0 Like `sanitize_post()`, `$context` defaults to 'display'.
2915   *
2916   * @param string $field   The Post Object field name.
2917   * @param mixed  $value   The Post Object value.
2918   * @param int    $post_id Post ID.
2919   * @param string $context Optional. How to sanitize the field. Possible values are 'raw', 'edit',
2920   *                        'db', 'display', 'attribute' and 'js'. Default 'display'.
2921   * @return mixed Sanitized value.
2922   */
2923  function sanitize_post_field( $field, $value, $post_id, $context = 'display' ) {
2924      $int_fields = array( 'ID', 'post_parent', 'menu_order' );
2925      if ( in_array( $field, $int_fields, true ) ) {
2926          $value = (int) $value;
2927      }
2928  
2929      // Fields which contain arrays of integers.
2930      $array_int_fields = array( 'ancestors' );
2931      if ( in_array( $field, $array_int_fields, true ) ) {
2932          $value = array_map( 'absint', $value );
2933          return $value;
2934      }
2935  
2936      if ( 'raw' === $context ) {
2937          return $value;
2938      }
2939  
2940      $prefixed = false;
2941      if ( str_contains( $field, 'post_' ) ) {
2942          $prefixed        = true;
2943          $field_no_prefix = str_replace( 'post_', '', $field );
2944      }
2945  
2946      if ( 'edit' === $context ) {
2947          $format_to_edit = array( 'post_content', 'post_excerpt', 'post_title', 'post_password' );
2948  
2949          if ( $prefixed ) {
2950  
2951              /**
2952               * Filters the value of a specific post field to edit.
2953               *
2954               * The dynamic portion of the hook name, `$field`, refers to the post
2955               * field name. Possible filter names include:
2956               *
2957               *  - `edit_post_author`
2958               *  - `edit_post_date`
2959               *  - `edit_post_date_gmt`
2960               *  - `edit_post_content`
2961               *  - `edit_post_title`
2962               *  - `edit_post_excerpt`
2963               *  - `edit_post_status`
2964               *  - `edit_post_password`
2965               *  - `edit_post_name`
2966               *  - `edit_post_modified`
2967               *  - `edit_post_modified_gmt`
2968               *  - `edit_post_content_filtered`
2969               *  - `edit_post_parent`
2970               *  - `edit_post_type`
2971               *  - `edit_post_mime_type`
2972               *
2973               * @since 2.3.0
2974               *
2975               * @param mixed $value   Value of the post field.
2976               * @param int   $post_id Post ID.
2977               */
2978              $value = apply_filters( "edit_{$field}", $value, $post_id );
2979  
2980              /**
2981               * Filters the value of a specific post field to edit.
2982               *
2983               * Only applied to post fields with a name which is prefixed with `post_`.
2984               *
2985               * The dynamic portion of the hook name, `$field_no_prefix`, refers to the
2986               * post field name minus the `post_` prefix. Possible filter names include:
2987               *
2988               *  - `author_edit_pre`
2989               *  - `date_edit_pre`
2990               *  - `date_gmt_edit_pre`
2991               *  - `content_edit_pre`
2992               *  - `title_edit_pre`
2993               *  - `excerpt_edit_pre`
2994               *  - `status_edit_pre`
2995               *  - `password_edit_pre`
2996               *  - `name_edit_pre`
2997               *  - `modified_edit_pre`
2998               *  - `modified_gmt_edit_pre`
2999               *  - `content_filtered_edit_pre`
3000               *  - `parent_edit_pre`
3001               *  - `type_edit_pre`
3002               *  - `mime_type_edit_pre`
3003               *
3004               * @since 2.3.0
3005               *
3006               * @param mixed $value   Value of the post field.
3007               * @param int   $post_id Post ID.
3008               */
3009              $value = apply_filters( "{$field_no_prefix}_edit_pre", $value, $post_id );
3010          } else {
3011              /**
3012               * Filters the value of a specific post field to edit.
3013               *
3014               * Only applied to post fields not prefixed with `post_`.
3015               *
3016               * The dynamic portion of the hook name, `$field`, refers to the
3017               * post field name. Possible filter names include:
3018               *
3019               *  - `edit_post_ID`
3020               *  - `edit_post_ping_status`
3021               *  - `edit_post_pinged`
3022               *  - `edit_post_to_ping`
3023               *  - `edit_post_comment_count`
3024               *  - `edit_post_comment_status`
3025               *  - `edit_post_guid`
3026               *  - `edit_post_menu_order`
3027               *
3028               * @since 2.3.0
3029               *
3030               * @param mixed $value   Value of the post field.
3031               * @param int   $post_id Post ID.
3032               */
3033              $value = apply_filters( "edit_post_{$field}", $value, $post_id );
3034          }
3035  
3036          if ( in_array( $field, $format_to_edit, true ) ) {
3037              if ( 'post_content' === $field ) {
3038                  $value = format_to_edit( $value, user_can_richedit() );
3039              } else {
3040                  $value = format_to_edit( $value );
3041              }
3042          } else {
3043              $value = esc_attr( $value );
3044          }
3045      } elseif ( 'db' === $context ) {
3046          if ( $prefixed ) {
3047  
3048              /**
3049               * Filters the value of a specific post field before saving.
3050               *
3051               * Only applied to post fields with a name which is prefixed with `post_`.
3052               *
3053               * The dynamic portion of the hook name, `$field`, refers to the post
3054               * field name. Possible filter names include:
3055               *
3056               *  - `pre_post_author`
3057               *  - `pre_post_date`
3058               *  - `pre_post_date_gmt`
3059               *  - `pre_post_content`
3060               *  - `pre_post_title`
3061               *  - `pre_post_excerpt`
3062               *  - `pre_post_status`
3063               *  - `pre_post_password`
3064               *  - `pre_post_name`
3065               *  - `pre_post_modified`
3066               *  - `pre_post_modified_gmt`
3067               *  - `pre_post_content_filtered`
3068               *  - `pre_post_parent`
3069               *  - `pre_post_type`
3070               *  - `pre_post_mime_type`
3071               *
3072               * @since 2.3.0
3073               *
3074               * @param mixed $value Value of the post field.
3075               */
3076              $value = apply_filters( "pre_{$field}", $value );
3077  
3078              /**
3079               * Filters the value of a specific field before saving.
3080               *
3081               * Only applied to post fields with a name which is prefixed with `post_`.
3082               *
3083               * The dynamic portion of the hook name, `$field_no_prefix`, refers to the
3084               * post field name minus the `post_` prefix. Possible filter names include:
3085               *
3086               *  - `author_save_pre`
3087               *  - `date_save_pre`
3088               *  - `date_gmt_save_pre`
3089               *  - `content_save_pre`
3090               *  - `title_save_pre`
3091               *  - `excerpt_save_pre`
3092               *  - `status_save_pre`
3093               *  - `password_save_pre`
3094               *  - `name_save_pre`
3095               *  - `modified_save_pre`
3096               *  - `modified_gmt_save_pre`
3097               *  - `content_filtered_save_pre`
3098               *  - `parent_save_pre`
3099               *  - `type_save_pre`
3100               *  - `mime_type_save_pre`
3101               *
3102               * @since 2.3.0
3103               *
3104               * @param mixed $value Value of the post field.
3105               */
3106              $value = apply_filters( "{$field_no_prefix}_save_pre", $value );
3107          } else {
3108              /**
3109               * Filters the value of a specific field before saving.
3110               *
3111               * Only applied to post fields with a name which is prefixed with `post_`.
3112               *
3113               * The dynamic portion of the hook name, `$field_no_prefix`, refers to the
3114               * post field name minus the `post_` prefix. Possible filter names include:
3115               *
3116               *  - `pre_post_ID`
3117               *  - `pre_post_comment_status`
3118               *  - `pre_post_ping_status`
3119               *  - `pre_post_to_ping`
3120               *  - `pre_post_pinged`
3121               *  - `pre_post_guid`
3122               *  - `pre_post_menu_order`
3123               *  - `pre_post_comment_count`
3124               *
3125               * @since 2.3.0
3126               *
3127               * @param mixed $value Value of the post field.
3128               */
3129              $value = apply_filters( "pre_post_{$field}", $value );
3130  
3131              /**
3132               * Filters the value of a specific post field before saving.
3133               *
3134               * Only applied to post fields with a name which is *not* prefixed with `post_`.
3135               *
3136               * The dynamic portion of the hook name, `$field`, refers to the post
3137               * field name. Possible filter names include:
3138               *
3139               *  - `ID_pre`
3140               *  - `comment_status_pre`
3141               *  - `ping_status_pre`
3142               *  - `to_ping_pre`
3143               *  - `pinged_pre`
3144               *  - `guid_pre`
3145               *  - `menu_order_pre`
3146               *  - `comment_count_pre`
3147               *
3148               * @since 2.3.0
3149               *
3150               * @param mixed $value Value of the post field.
3151               */
3152              $value = apply_filters( "{$field}_pre", $value );
3153          }
3154      } else {
3155  
3156          // Use display filters by default.
3157          if ( $prefixed ) {
3158  
3159              /**
3160               * Filters the value of a specific post field for display.
3161               *
3162               * Only applied to post fields with a name which is prefixed with `post_`.
3163               *
3164               * The dynamic portion of the hook name, `$field`, refers to the post
3165               * field name. Possible filter names include:
3166               *
3167               *  - `post_author`
3168               *  - `post_date`
3169               *  - `post_date_gmt`
3170               *  - `post_content`
3171               *  - `post_title`
3172               *  - `post_excerpt`
3173               *  - `post_status`
3174               *  - `post_password`
3175               *  - `post_name`
3176               *  - `post_modified`
3177               *  - `post_modified_gmt`
3178               *  - `post_content_filtered`
3179               *  - `post_parent`
3180               *  - `post_type`
3181               *  - `post_mime_type`
3182               *
3183               * @since 2.3.0
3184               *
3185               * @param mixed  $value   Value of the prefixed post field.
3186               * @param int    $post_id Post ID.
3187               * @param string $context Context for how to sanitize the field.
3188               *                        Accepts 'raw', 'edit', 'db', 'display',
3189               *                        'attribute', or 'js'. Default 'display'.
3190               */
3191              $value = apply_filters( "{$field}", $value, $post_id, $context );
3192          } else {
3193              /**
3194               * Filters the value of a specific post field for display.
3195               *
3196               * Only applied to post fields name which is *not* prefixed with `post_`.
3197               *
3198               * The dynamic portion of the hook name, `$field`, refers to the post
3199               * field name. Possible filter names include:
3200               *
3201               *  - `post_ID`
3202               *  - `post_comment_status`
3203               *  - `post_ping_status`
3204               *  - `post_to_ping`
3205               *  - `post_pinged`
3206               *  - `post_guid`
3207               *  - `post_menu_order`
3208               *  - `post_comment_count`
3209               *
3210               * @since 2.3.0
3211               *
3212               * @param mixed  $value   Value of the unprefixed post field.
3213               * @param int    $post_id Post ID
3214               * @param string $context Context for how to sanitize the field.
3215               *                        Accepts 'raw', 'edit', 'db', 'display',
3216               *                        'attribute', or 'js'. Default 'display'.
3217               */
3218              $value = apply_filters( "post_{$field}", $value, $post_id, $context );
3219          }
3220  
3221          if ( 'attribute' === $context ) {
3222              $value = esc_attr( $value );
3223          } elseif ( 'js' === $context ) {
3224              $value = esc_js( $value );
3225          }
3226      }
3227  
3228      // Restore the type for integer fields after esc_attr().
3229      if ( in_array( $field, $int_fields, true ) ) {
3230          $value = (int) $value;
3231      }
3232      return $value;
3233  }
3234  
3235  /**
3236   * Makes a post sticky.
3237   *
3238   * Sticky posts should be displayed at the top of the front page.
3239   *
3240   * @since 2.7.0
3241   *
3242   * @param int $post_id Post ID.
3243   */
3244  function stick_post( $post_id ) {
3245      $post_id  = (int) $post_id;
3246      $stickies = get_option( 'sticky_posts' );
3247      $updated  = false;
3248  
3249      if ( ! is_array( $stickies ) ) {
3250          $stickies = array();
3251      } else {
3252          $stickies = array_unique( array_map( 'intval', $stickies ) );
3253      }
3254  
3255      if ( ! in_array( $post_id, $stickies, true ) ) {
3256          $stickies[] = $post_id;
3257          $updated    = update_option( 'sticky_posts', array_values( $stickies ) );
3258      }
3259  
3260      if ( $updated ) {
3261          /**
3262           * Fires once a post has been added to the sticky list.
3263           *
3264           * @since 4.6.0
3265           *
3266           * @param int $post_id ID of the post that was stuck.
3267           */
3268          do_action( 'post_stuck', $post_id );
3269      }
3270  }
3271  
3272  /**
3273   * Un-sticks a post.
3274   *
3275   * Sticky posts should be displayed at the top of the front page.
3276   *
3277   * @since 2.7.0
3278   *
3279   * @param int $post_id Post ID.
3280   */
3281  function unstick_post( $post_id ) {
3282      $post_id  = (int) $post_id;
3283      $stickies = get_option( 'sticky_posts' );
3284  
3285      if ( ! is_array( $stickies ) ) {
3286          return;
3287      }
3288  
3289      $stickies = array_values( array_unique( array_map( 'intval', $stickies ) ) );
3290  
3291      if ( ! in_array( $post_id, $stickies, true ) ) {
3292          return;
3293      }
3294  
3295      $offset = array_search( $post_id, $stickies, true );
3296      if ( false === $offset ) {
3297          return;
3298      }
3299  
3300      array_splice( $stickies, $offset, 1 );
3301  
3302      $updated = update_option( 'sticky_posts', $stickies );
3303  
3304      if ( $updated ) {
3305          /**
3306           * Fires once a post has been removed from the sticky list.
3307           *
3308           * @since 4.6.0
3309           *
3310           * @param int $post_id ID of the post that was unstuck.
3311           */
3312          do_action( 'post_unstuck', $post_id );
3313      }
3314  }
3315  
3316  /**
3317   * Returns the cache key for wp_count_posts() based on the passed arguments.
3318   *
3319   * @since 3.9.0
3320   * @access private
3321   *
3322   * @param string $type Optional. Post type to retrieve count Default 'post'.
3323   * @param string $perm Optional. 'readable' or empty. Default empty.
3324   * @return string The cache key.
3325   */
3326  function _count_posts_cache_key( $type = 'post', $perm = '' ) {
3327      $cache_key = 'posts-' . $type;
3328  
3329      if ( 'readable' === $perm && is_user_logged_in() ) {
3330          $post_type_object = get_post_type_object( $type );
3331  
3332          if ( $post_type_object && ! current_user_can( $post_type_object->cap->read_private_posts ) ) {
3333              $cache_key .= '_' . $perm . '_' . get_current_user_id();
3334          }
3335      }
3336  
3337      return $cache_key;
3338  }
3339  
3340  /**
3341   * Counts number of posts of a post type and if user has permissions to view.
3342   *
3343   * This function provides an efficient method of finding the amount of post's
3344   * type a blog has. Another method is to count the amount of items in
3345   * get_posts(), but that method has a lot of overhead with doing so. Therefore,
3346   * when developing for 2.5+, use this function instead.
3347   *
3348   * The $perm parameter checks for 'readable' value and if the user can read
3349   * private posts, it will display that for the user that is signed in.
3350   *
3351   * @since 2.5.0
3352   *
3353   * @global wpdb $wpdb WordPress database abstraction object.
3354   *
3355   * @param string $type Optional. Post type to retrieve count. Default 'post'.
3356   * @param string $perm Optional. 'readable' or empty. Default empty.
3357   * @return stdClass An object containing the number of posts for each status,
3358   *                  or an empty object if the post type does not exist.
3359   */
3360  function wp_count_posts( $type = 'post', $perm = '' ) {
3361      global $wpdb;
3362  
3363      if ( ! post_type_exists( $type ) ) {
3364          return new stdClass();
3365      }
3366  
3367      $cache_key = _count_posts_cache_key( $type, $perm );
3368  
3369      $counts = wp_cache_get( $cache_key, 'counts' );
3370      if ( false !== $counts ) {
3371          // We may have cached this before every status was registered.
3372          foreach ( get_post_stati() as $status ) {
3373              if ( ! isset( $counts->{$status} ) ) {
3374                  $counts->{$status} = 0;
3375              }
3376          }
3377  
3378          /** This filter is documented in wp-includes/post.php */
3379          return apply_filters( 'wp_count_posts', $counts, $type, $perm );
3380      }
3381  
3382      $query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
3383  
3384      if ( 'readable' === $perm && is_user_logged_in() ) {
3385          $post_type_object = get_post_type_object( $type );
3386          if ( ! current_user_can( $post_type_object->cap->read_private_posts ) ) {
3387              $query .= $wpdb->prepare(
3388                  " AND (post_status != 'private' OR ( post_author = %d AND post_status = 'private' ))",
3389                  get_current_user_id()
3390              );
3391          }
3392      }
3393  
3394      $query .= ' GROUP BY post_status';
3395  
3396      $results = (array) $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
3397      $counts  = array_fill_keys( get_post_stati(), 0 );
3398  
3399      foreach ( $results as $row ) {
3400          $counts[ $row['post_status'] ] = $row['num_posts'];
3401      }
3402  
3403      $counts = (object) $counts;
3404      wp_cache_set( $cache_key, $counts, 'counts' );
3405  
3406      /**
3407       * Filters the post counts by status for the current post type.
3408       *
3409       * @since 3.7.0
3410       *
3411       * @param stdClass $counts An object containing the current post_type's post
3412       *                         counts by status.
3413       * @param string   $type   Post type.
3414       * @param string   $perm   The permission to determine if the posts are 'readable'
3415       *                         by the current user.
3416       */
3417      return apply_filters( 'wp_count_posts', $counts, $type, $perm );
3418  }
3419  
3420  /**
3421   * Counts number of attachments for the mime type(s).
3422   *
3423   * If you set the optional mime_type parameter, then an array will still be
3424   * returned, but will only have the item you are looking for. It does not give
3425   * you the number of attachments that are children of a post. You can get that
3426   * by counting the number of children that post has.
3427   *
3428   * @since 2.5.0
3429   *
3430   * @global wpdb $wpdb WordPress database abstraction object.
3431   *
3432   * @param string|string[] $mime_type Optional. Array or comma-separated list of
3433   *                                   MIME patterns. Default empty.
3434   * @return stdClass An object containing the attachment counts by mime type.
3435   */
3436  function wp_count_attachments( $mime_type = '' ) {
3437      global $wpdb;
3438  
3439      $cache_key = sprintf(
3440          'attachments%s',
3441          ! empty( $mime_type ) ? ':' . str_replace( '/', '_', implode( '-', (array) $mime_type ) ) : ''
3442      );
3443  
3444      $counts = wp_cache_get( $cache_key, 'counts' );
3445  
3446      if ( false === $counts ) {
3447          $and   = wp_post_mime_type_where( $mime_type );
3448          $count = $wpdb->get_results( "SELECT post_mime_type, COUNT( * ) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' $and GROUP BY post_mime_type", ARRAY_A );
3449  
3450          $counts = array();
3451          foreach ( (array) $count as $row ) {
3452              $counts[ $row['post_mime_type'] ] = $row['num_posts'];
3453          }
3454          $counts['trash'] = $wpdb->get_var( "SELECT COUNT( * ) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status = 'trash' $and" );
3455  
3456          wp_cache_set( $cache_key, (object) $counts, 'counts' );
3457      }
3458  
3459      /**
3460       * Filters the attachment counts by mime type.
3461       *
3462       * @since 3.7.0
3463       *
3464       * @param stdClass        $counts    An object containing the attachment counts by
3465       *                                   mime type.
3466       * @param string|string[] $mime_type Array or comma-separated list of MIME patterns.
3467       */
3468      return apply_filters( 'wp_count_attachments', (object) $counts, $mime_type );
3469  }
3470  
3471  /**
3472   * Gets default post mime types.
3473   *
3474   * @since 2.9.0
3475   * @since 5.3.0 Added the 'Documents', 'Spreadsheets', and 'Archives' mime type groups.
3476   *
3477   * @return array List of post mime types.
3478   */
3479  function get_post_mime_types() {
3480      $post_mime_types = array(   // array( adj, noun )
3481          'image'       => array(
3482              __( 'Images' ),
3483              __( 'Manage Images' ),
3484              /* translators: %s: Number of images. */
3485              _n_noop(
3486                  'Image <span class="count">(%s)</span>',
3487                  'Images <span class="count">(%s)</span>'
3488              ),
3489          ),
3490          'audio'       => array(
3491              _x( 'Audio', 'file type group' ),
3492              __( 'Manage Audio' ),
3493              /* translators: %s: Number of audio files. */
3494              _n_noop(
3495                  'Audio <span class="count">(%s)</span>',
3496                  'Audio <span class="count">(%s)</span>'
3497              ),
3498          ),
3499          'video'       => array(
3500              _x( 'Video', 'file type group' ),
3501              __( 'Manage Video' ),
3502              /* translators: %s: Number of video files. */
3503              _n_noop(
3504                  'Video <span class="count">(%s)</span>',
3505                  'Video <span class="count">(%s)</span>'
3506              ),
3507          ),
3508          'document'    => array(
3509              __( 'Documents' ),
3510              __( 'Manage Documents' ),
3511              /* translators: %s: Number of documents. */
3512              _n_noop(
3513                  'Document <span class="count">(%s)</span>',
3514                  'Documents <span class="count">(%s)</span>'
3515              ),
3516          ),
3517          'spreadsheet' => array(
3518              __( 'Spreadsheets' ),
3519              __( 'Manage Spreadsheets' ),
3520              /* translators: %s: Number of spreadsheets. */
3521              _n_noop(
3522                  'Spreadsheet <span class="count">(%s)</span>',
3523                  'Spreadsheets <span class="count">(%s)</span>'
3524              ),
3525          ),
3526          'archive'     => array(
3527              _x( 'Archives', 'file type group' ),
3528              __( 'Manage Archives' ),
3529              /* translators: %s: Number of archives. */
3530              _n_noop(
3531                  'Archive <span class="count">(%s)</span>',
3532                  'Archives <span class="count">(%s)</span>'
3533              ),
3534          ),
3535      );
3536  
3537      $ext_types  = wp_get_ext_types();
3538      $mime_types = wp_get_mime_types();
3539  
3540      foreach ( $post_mime_types as $group => $labels ) {
3541          if ( in_array( $group, array( 'image', 'audio', 'video' ), true ) ) {
3542              continue;
3543          }
3544  
3545          if ( ! isset( $ext_types[ $group ] ) ) {
3546              unset( $post_mime_types[ $group ] );
3547              continue;
3548          }
3549  
3550          $group_mime_types = array();
3551          foreach ( $ext_types[ $group ] as $extension ) {
3552              foreach ( $mime_types as $exts => $mime ) {
3553                  if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
3554                      $group_mime_types[] = $mime;
3555                      break;
3556                  }
3557              }
3558          }
3559          $group_mime_types = implode( ',', array_unique( $group_mime_types ) );
3560  
3561          $post_mime_types[ $group_mime_types ] = $labels;
3562          unset( $post_mime_types[ $group ] );
3563      }
3564  
3565      /**
3566       * Filters the default list of post mime types.
3567       *
3568       * @since 2.5.0
3569       *
3570       * @param array $post_mime_types Default list of post mime types.
3571       */
3572      return apply_filters( 'post_mime_types', $post_mime_types );
3573  }
3574  
3575  /**
3576   * Checks a MIME-Type against a list.
3577   *
3578   * If the `$wildcard_mime_types` parameter is a string, it must be comma separated
3579   * list. If the `$real_mime_types` is a string, it is also comma separated to
3580   * create the list.
3581   *
3582   * @since 2.5.0
3583   *
3584   * @param string|string[] $wildcard_mime_types Mime types, e.g. `audio/mpeg`, `image` (same as `image/*`),
3585   *                                             or `flash` (same as `*flash*`).
3586   * @param string|string[] $real_mime_types     Real post mime type values.
3587   * @return array array(wildcard=>array(real types)).
3588   */
3589  function wp_match_mime_types( $wildcard_mime_types, $real_mime_types ) {
3590      $matches = array();
3591      if ( is_string( $wildcard_mime_types ) ) {
3592          $wildcard_mime_types = array_map( 'trim', explode( ',', $wildcard_mime_types ) );
3593      }
3594      if ( is_string( $real_mime_types ) ) {
3595          $real_mime_types = array_map( 'trim', explode( ',', $real_mime_types ) );
3596      }
3597  
3598      $patternses = array();
3599      $wild       = '[-._a-z0-9]*';
3600  
3601      foreach ( (array) $wildcard_mime_types as $type ) {
3602          $mimes = array_map( 'trim', explode( ',', $type ) );
3603          foreach ( $mimes as $mime ) {
3604              $regex = str_replace( '__wildcard__', $wild, preg_quote( str_replace( '*', '__wildcard__', $mime ) ) );
3605  
3606              $patternses[][ $type ] = "^$regex$";
3607  
3608              if ( ! str_contains( $mime, '/' ) ) {
3609                  $patternses[][ $type ] = "^$regex/";
3610                  $patternses[][ $type ] = $regex;
3611              }
3612          }
3613      }
3614      asort( $patternses );
3615  
3616      foreach ( $patternses as $patterns ) {
3617          foreach ( $patterns as $type => $pattern ) {
3618              foreach ( (array) $real_mime_types as $real ) {
3619                  if ( preg_match( "#$pattern#", $real )
3620                      && ( empty( $matches[ $type ] ) || false === array_search( $real, $matches[ $type ], true ) )
3621                  ) {
3622                      $matches[ $type ][] = $real;
3623                  }
3624              }
3625          }
3626      }
3627  
3628      return $matches;
3629  }
3630  
3631  /**
3632   * Converts MIME types into SQL.
3633   *
3634   * @since 2.5.0
3635   *
3636   * @param string|string[] $post_mime_types List of mime types or comma separated string
3637   *                                         of mime types.
3638   * @param string          $table_alias     Optional. Specify a table alias, if needed.
3639   *                                         Default empty.
3640   * @return string The SQL AND clause for mime searching.
3641   */
3642  function wp_post_mime_type_where( $post_mime_types, $table_alias = '' ) {
3643      $where     = '';
3644      $wildcards = array( '', '%', '%/%' );
3645      if ( is_string( $post_mime_types ) ) {
3646          $post_mime_types = array_map( 'trim', explode( ',', $post_mime_types ) );
3647      }
3648  
3649      $where_clauses = array();
3650  
3651      foreach ( (array) $post_mime_types as $mime_type ) {
3652          $mime_type = preg_replace( '/\s/', '', $mime_type );
3653          $slashpos  = strpos( $mime_type, '/' );
3654          if ( false !== $slashpos ) {
3655              $mime_group    = preg_replace( '/[^-*.a-zA-Z0-9]/', '', substr( $mime_type, 0, $slashpos ) );
3656              $mime_subgroup = preg_replace( '/[^-*.+a-zA-Z0-9]/', '', substr( $mime_type, $slashpos + 1 ) );
3657              if ( empty( $mime_subgroup ) ) {
3658                  $mime_subgroup = '*';
3659              } else {
3660                  $mime_subgroup = str_replace( '/', '', $mime_subgroup );
3661              }
3662              $mime_pattern = "$mime_group/$mime_subgroup";
3663          } else {
3664              $mime_pattern = preg_replace( '/[^-*.a-zA-Z0-9]/', '', $mime_type );
3665              if ( ! str_contains( $mime_pattern, '*' ) ) {
3666                  $mime_pattern .= '/*';
3667              }
3668          }
3669  
3670          $mime_pattern = preg_replace( '/\*+/', '%', $mime_pattern );
3671  
3672          if ( in_array( $mime_type, $wildcards, true ) ) {
3673              return '';
3674          }
3675  
3676          if ( str_contains( $mime_pattern, '%' ) ) {
3677              $where_clauses[] = empty( $table_alias ) ? "post_mime_type LIKE '$mime_pattern'" : "$table_alias.post_mime_type LIKE '$mime_pattern'";
3678          } else {
3679              $where_clauses[] = empty( $table_alias ) ? "post_mime_type = '$mime_pattern'" : "$table_alias.post_mime_type = '$mime_pattern'";
3680          }
3681      }
3682  
3683      if ( ! empty( $where_clauses ) ) {
3684          $where = ' AND (' . implode( ' OR ', $where_clauses ) . ') ';
3685      }
3686  
3687      return $where;
3688  }
3689  
3690  /**
3691   * Trashes or deletes a post or page.
3692   *
3693   * When the post and page is permanently deleted, everything that is tied to
3694   * it is deleted also. This includes comments, post meta fields, and terms
3695   * associated with the post.
3696   *
3697   * The post or page is moved to Trash instead of permanently deleted unless
3698   * Trash is disabled, item is already in the Trash, or $force_delete is true.
3699   *
3700   * @since 1.0.0
3701   *
3702   * @global wpdb $wpdb WordPress database abstraction object.
3703   * @see wp_delete_attachment()
3704   * @see wp_trash_post()
3705   *
3706   * @param int  $post_id      Optional. Post ID. Default 0.
3707   * @param bool $force_delete Optional. Whether to bypass Trash and force deletion.
3708   *                           Default false.
3709   * @return WP_Post|false|null Post data on success, false or null on failure.
3710   */
3711  function wp_delete_post( $post_id = 0, $force_delete = false ) {
3712      global $wpdb;
3713  
3714      $post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id ) );
3715  
3716      if ( ! $post ) {
3717          return $post;
3718      }
3719  
3720      $post = get_post( $post );
3721  
3722      if ( ! $force_delete
3723          && ( 'post' === $post->post_type || 'page' === $post->post_type )
3724          && 'trash' !== get_post_status( $post_id ) && EMPTY_TRASH_DAYS
3725      ) {
3726          return wp_trash_post( $post_id );
3727      }
3728  
3729      if ( 'attachment' === $post->post_type ) {
3730          return wp_delete_attachment( $post_id, $force_delete );
3731      }
3732  
3733      /**
3734       * Filters whether a post deletion should take place.
3735       *
3736       * @since 4.4.0
3737       *
3738       * @param WP_Post|false|null $delete       Whether to go forward with deletion.
3739       * @param WP_Post            $post         Post object.
3740       * @param bool               $force_delete Whether to bypass the Trash.
3741       */
3742      $check = apply_filters( 'pre_delete_post', null, $post, $force_delete );
3743      if ( null !== $check ) {
3744          return $check;
3745      }
3746  
3747      /**
3748       * Fires before a post is deleted, at the start of wp_delete_post().
3749       *
3750       * @since 3.2.0
3751       * @since 5.5.0 Added the `$post` parameter.
3752       *
3753       * @see wp_delete_post()
3754       *
3755       * @param int     $post_id Post ID.
3756       * @param WP_Post $post    Post object.
3757       */
3758      do_action( 'before_delete_post', $post_id, $post );
3759  
3760      delete_post_meta( $post_id, '_wp_trash_meta_status' );
3761      delete_post_meta( $post_id, '_wp_trash_meta_time' );
3762  
3763      wp_delete_object_term_relationships( $post_id, get_object_taxonomies( $post->post_type ) );
3764  
3765      $parent_data  = array( 'post_parent' => $post->post_parent );
3766      $parent_where = array( 'post_parent' => $post_id );
3767  
3768      if ( is_post_type_hierarchical( $post->post_type ) ) {
3769          // Point children of this page to its parent, also clean the cache of affected children.
3770          $children_query = $wpdb->prepare(
3771              "SELECT * FROM $wpdb->posts WHERE post_parent = %d AND post_type = %s",
3772              $post_id,
3773              $post->post_type
3774          );
3775  
3776          $children = $wpdb->get_results( $children_query );
3777  
3778          if ( $children ) {
3779              $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => $post->post_type ) );
3780          }
3781      }
3782  
3783      // Do raw query. wp_get_post_revisions() is filtered.
3784      $revision_ids = $wpdb->get_col(
3785          $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'revision'", $post_id )
3786      );
3787  
3788      // Use wp_delete_post (via wp_delete_post_revision) again. Ensures any meta/misplaced data gets cleaned up.
3789      foreach ( $revision_ids as $revision_id ) {
3790          wp_delete_post_revision( $revision_id );
3791      }
3792  
3793      // Point all attachments to this post up one level.
3794      $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'attachment' ) );
3795  
3796      wp_defer_comment_counting( true );
3797  
3798      $comment_ids = $wpdb->get_col(
3799          $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d ORDER BY comment_ID DESC", $post_id )
3800      );
3801  
3802      foreach ( $comment_ids as $comment_id ) {
3803          wp_delete_comment( $comment_id, true );
3804      }
3805  
3806      wp_defer_comment_counting( false );
3807  
3808      $post_meta_ids = $wpdb->get_col(
3809          $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id )
3810      );
3811  
3812      foreach ( $post_meta_ids as $mid ) {
3813          delete_metadata_by_mid( 'post', $mid );
3814      }
3815  
3816      /**
3817       * Fires immediately before a post is deleted from the database.
3818       *
3819       * The dynamic portion of the hook name, `$post->post_type`, refers to
3820       * the post type slug.
3821       *
3822       * @since 6.6.0
3823       *
3824       * @param int     $post_id Post ID.
3825       * @param WP_Post $post    Post object.
3826       */
3827      do_action( "delete_post_{$post->post_type}", $post_id, $post );
3828  
3829      /**
3830       * Fires immediately before a post is deleted from the database.
3831       *
3832       * @since 1.2.0
3833       * @since 5.5.0 Added the `$post` parameter.
3834       *
3835       * @param int     $post_id Post ID.
3836       * @param WP_Post $post    Post object.
3837       */
3838      do_action( 'delete_post', $post_id, $post );
3839  
3840      $result = $wpdb->delete( $wpdb->posts, array( 'ID' => $post_id ) );
3841      if ( ! $result ) {
3842          return false;
3843      }
3844  
3845      /**
3846       * Fires immediately after a post is deleted from the database.
3847       *
3848       * The dynamic portion of the hook name, `$post->post_type`, refers to
3849       * the post type slug.
3850       *
3851       * @since 6.6.0
3852       *
3853       * @param int     $post_id Post ID.
3854       * @param WP_Post $post    Post object.
3855       */
3856      do_action( "deleted_post_{$post->post_type}", $post_id, $post );
3857  
3858      /**
3859       * Fires immediately after a post is deleted from the database.
3860       *
3861       * @since 2.2.0
3862       * @since 5.5.0 Added the `$post` parameter.
3863       *
3864       * @param int     $post_id Post ID.
3865       * @param WP_Post $post    Post object.
3866       */
3867      do_action( 'deleted_post', $post_id, $post );
3868  
3869      clean_post_cache( $post );
3870  
3871      if ( is_post_type_hierarchical( $post->post_type ) && $children ) {
3872          foreach ( $children as $child ) {
3873              clean_post_cache( $child );
3874          }
3875      }
3876  
3877      wp_clear_scheduled_hook( 'publish_future_post', array( $post_id ) );
3878  
3879      /**
3880       * Fires after a post is deleted, at the conclusion of wp_delete_post().
3881       *
3882       * @since 3.2.0
3883       * @since 5.5.0 Added the `$post` parameter.
3884       *
3885       * @see wp_delete_post()
3886       *
3887       * @param int     $post_id Post ID.
3888       * @param WP_Post $post    Post object.
3889       */
3890      do_action( 'after_delete_post', $post_id, $post );
3891  
3892      return $post;
3893  }
3894  
3895  /**
3896   * Resets the page_on_front, show_on_front, and page_for_post settings when
3897   * a linked page is deleted or trashed.
3898   *
3899   * Also ensures the post is no longer sticky.
3900   *
3901   * @since 3.7.0
3902   * @access private
3903   *
3904   * @param int $post_id Post ID.
3905   */
3906  function _reset_front_page_settings_for_post( $post_id ) {
3907      $post = get_post( $post_id );
3908  
3909      if ( 'page' === $post->post_type ) {
3910          /*
3911           * If the page is defined in option page_on_front or post_for_posts,
3912           * adjust the corresponding options.
3913           */
3914          if ( (int) get_option( 'page_on_front' ) === $post->ID ) {
3915              update_option( 'show_on_front', 'posts' );
3916              update_option( 'page_on_front', 0 );
3917          }
3918          if ( (int) get_option( 'page_for_posts' ) === $post->ID ) {
3919              update_option( 'page_for_posts', 0 );
3920          }
3921      }
3922  
3923      unstick_post( $post->ID );
3924  }
3925  
3926  /**
3927   * Moves a post or page to the Trash
3928   *
3929   * If Trash is disabled, the post or page is permanently deleted.
3930   *
3931   * @since 2.9.0
3932   *
3933   * @see wp_delete_post()
3934   *
3935   * @param int $post_id Optional. Post ID. Default is the ID of the global `$post`
3936   *                     if `EMPTY_TRASH_DAYS` equals true.
3937   * @return WP_Post|false|null Post data on success, false or null on failure.
3938   */
3939  function wp_trash_post( $post_id = 0 ) {
3940      if ( ! EMPTY_TRASH_DAYS ) {
3941          return wp_delete_post( $post_id, true );
3942      }
3943  
3944      $post = get_post( $post_id );
3945  
3946      if ( ! $post ) {
3947          return $post;
3948      }
3949  
3950      if ( 'trash' === $post->post_status ) {
3951          return false;
3952      }
3953  
3954      $previous_status = $post->post_status;
3955  
3956      /**
3957       * Filters whether a post trashing should take place.
3958       *
3959       * @since 4.9.0
3960       * @since 6.3.0 Added the `$previous_status` parameter.
3961       *
3962       * @param bool|null $trash           Whether to go forward with trashing.
3963       * @param WP_Post   $post            Post object.
3964       * @param string    $previous_status The status of the post about to be trashed.
3965       */
3966      $check = apply_filters( 'pre_trash_post', null, $post, $previous_status );
3967  
3968      if ( null !== $check ) {
3969          return $check;
3970      }
3971  
3972      /**
3973       * Fires before a post is sent to the Trash.
3974       *
3975       * @since 3.3.0
3976       * @since 6.3.0 Added the `$previous_status` parameter.
3977       *
3978       * @param int    $post_id         Post ID.
3979       * @param string $previous_status The status of the post about to be trashed.
3980       */
3981      do_action( 'wp_trash_post', $post_id, $previous_status );
3982  
3983      add_post_meta( $post_id, '_wp_trash_meta_status', $previous_status );
3984      add_post_meta( $post_id, '_wp_trash_meta_time', time() );
3985  
3986      $post_updated = wp_update_post(
3987          array(
3988              'ID'          => $post_id,
3989              'post_status' => 'trash',
3990          )
3991      );
3992  
3993      if ( ! $post_updated ) {
3994          return false;
3995      }
3996  
3997      wp_trash_post_comments( $post_id );
3998  
3999      /**
4000       * Fires after a post is sent to the Trash.
4001       *
4002       * @since 2.9.0
4003       * @since 6.3.0 Added the `$previous_status` parameter.
4004       *
4005       * @param int    $post_id         Post ID.
4006       * @param string $previous_status The status of the post at the point where it was trashed.
4007       */
4008      do_action( 'trashed_post', $post_id, $previous_status );
4009  
4010      return $post;
4011  }
4012  
4013  /**
4014   * Restores a post from the Trash.
4015   *
4016   * @since 2.9.0
4017   * @since 5.6.0 An untrashed post is now returned to 'draft' status by default, except for
4018   *              attachments which are returned to their original 'inherit' status.
4019   *
4020   * @param int $post_id Optional. Post ID. Default is the ID of the global `$post`.
4021   * @return WP_Post|false|null Post data on success, false or null on failure.
4022   */
4023  function wp_untrash_post( $post_id = 0 ) {
4024      $post = get_post( $post_id );
4025  
4026      if ( ! $post ) {
4027          return $post;
4028      }
4029  
4030      $post_id = $post->ID;
4031  
4032      if ( 'trash' !== $post->post_status ) {
4033          return false;
4034      }
4035  
4036      $previous_status = get_post_meta( $post_id, '_wp_trash_meta_status', true );
4037  
4038      /**
4039       * Filters whether a post untrashing should take place.
4040       *
4041       * @since 4.9.0
4042       * @since 5.6.0 Added the `$previous_status` parameter.
4043       *
4044       * @param bool|null $untrash         Whether to go forward with untrashing.
4045       * @param WP_Post   $post            Post object.
4046       * @param string    $previous_status The status of the post at the point where it was trashed.
4047       */
4048      $check = apply_filters( 'pre_untrash_post', null, $post, $previous_status );
4049      if ( null !== $check ) {
4050          return $check;
4051      }
4052  
4053      /**
4054       * Fires before a post is restored from the Trash.
4055       *
4056       * @since 2.9.0
4057       * @since 5.6.0 Added the `$previous_status` parameter.
4058       *
4059       * @param int    $post_id         Post ID.
4060       * @param string $previous_status The status of the post at the point where it was trashed.
4061       */
4062      do_action( 'untrash_post', $post_id, $previous_status );
4063  
4064      $new_status = ( 'attachment' === $post->post_type ) ? 'inherit' : 'draft';
4065  
4066      /**
4067       * Filters the status that a post gets assigned when it is restored from the trash (untrashed).
4068       *
4069       * By default posts that are restored will be assigned a status of 'draft'. Return the value of `$previous_status`
4070       * in order to assign the status that the post had before it was trashed. The `wp_untrash_post_set_previous_status()`
4071       * function is available for this.
4072       *
4073       * Prior to WordPress 5.6.0, restored posts were always assigned their original status.
4074       *
4075       * @since 5.6.0
4076       *
4077       * @param string $new_status      The new status of the post being restored.
4078       * @param int    $post_id         The ID of the post being restored.
4079       * @param string $previous_status The status of the post at the point where it was trashed.
4080       */
4081      $post_status = apply_filters( 'wp_untrash_post_status', $new_status, $post_id, $previous_status );
4082  
4083      delete_post_meta( $post_id, '_wp_trash_meta_status' );
4084      delete_post_meta( $post_id, '_wp_trash_meta_time' );
4085  
4086      $post_updated = wp_update_post(
4087          array(
4088              'ID'          => $post_id,
4089              'post_status' => $post_status,
4090          )
4091      );
4092  
4093      if ( ! $post_updated ) {
4094          return false;
4095      }
4096  
4097      wp_untrash_post_comments( $post_id );
4098  
4099      /**
4100       * Fires after a post is restored from the Trash.
4101       *
4102       * @since 2.9.0
4103       * @since 5.6.0 Added the `$previous_status` parameter.
4104       *
4105       * @param int    $post_id         Post ID.
4106       * @param string $previous_status The status of the post at the point where it was trashed.
4107       */
4108      do_action( 'untrashed_post', $post_id, $previous_status );
4109  
4110      return $post;
4111  }
4112  
4113  /**
4114   * Moves comments for a post to the Trash.
4115   *
4116   * @since 2.9.0
4117   *
4118   * @global wpdb $wpdb WordPress database abstraction object.
4119   *
4120   * @param int|WP_Post|null $post Optional. Post ID or post object. Defaults to global $post.
4121   * @return mixed|void False on failure.
4122   */
4123  function wp_trash_post_comments( $post = null ) {
4124      global $wpdb;
4125  
4126      $post = get_post( $post );
4127  
4128      if ( ! $post ) {
4129          return;
4130      }
4131  
4132      $post_id = $post->ID;
4133  
4134      /**
4135       * Fires before comments are sent to the Trash.
4136       *
4137       * @since 2.9.0
4138       *
4139       * @param int $post_id Post ID.
4140       */
4141      do_action( 'trash_post_comments', $post_id );
4142  
4143      $comments = $wpdb->get_results( $wpdb->prepare( "SELECT comment_ID, comment_approved FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ) );
4144  
4145      if ( ! $comments ) {
4146          return;
4147      }
4148  
4149      // Cache current status for each comment.
4150      $statuses = array();
4151      foreach ( $comments as $comment ) {
4152          $statuses[ $comment->comment_ID ] = $comment->comment_approved;
4153      }
4154      add_post_meta( $post_id, '_wp_trash_meta_comments_status', $statuses );
4155  
4156      // Set status for all comments to post-trashed.
4157      $result = $wpdb->update( $wpdb->comments, array( 'comment_approved' => 'post-trashed' ), array( 'comment_post_ID' => $post_id ) );
4158  
4159      clean_comment_cache( array_keys( $statuses ) );
4160  
4161      /**
4162       * Fires after comments are sent to the Trash.
4163       *
4164       * @since 2.9.0
4165       *
4166       * @param int   $post_id  Post ID.
4167       * @param array $statuses Array of comment statuses.
4168       */
4169      do_action( 'trashed_post_comments', $post_id, $statuses );
4170  
4171      return $result;
4172  }
4173  
4174  /**
4175   * Restores comments for a post from the Trash.
4176   *
4177   * @since 2.9.0
4178   *
4179   * @global wpdb $wpdb WordPress database abstraction object.
4180   *
4181   * @param int|WP_Post|null $post Optional. Post ID or post object. Defaults to global $post.
4182   * @return true|void
4183   */
4184  function wp_untrash_post_comments( $post = null ) {
4185      global $wpdb;
4186  
4187      $post = get_post( $post );
4188  
4189      if ( ! $post ) {
4190          return;
4191      }
4192  
4193      $post_id = $post->ID;
4194  
4195      $statuses = get_post_meta( $post_id, '_wp_trash_meta_comments_status', true );
4196  
4197      if ( ! $statuses ) {
4198          return true;
4199      }
4200  
4201      /**
4202       * Fires before comments are restored for a post from the Trash.
4203       *
4204       * @since 2.9.0
4205       *
4206       * @param int $post_id Post ID.
4207       */
4208      do_action( 'untrash_post_comments', $post_id );
4209  
4210      // Restore each comment to its original status.
4211      $group_by_status = array();
4212      foreach ( $statuses as $comment_id => $comment_status ) {
4213          $group_by_status[ $comment_status ][] = $comment_id;
4214      }
4215  
4216      foreach ( $group_by_status as $status => $comments ) {
4217          // Confidence check. This shouldn't happen.
4218          if ( 'post-trashed' === $status ) {
4219              $status = '0';
4220          }
4221          $comments_in = implode( ', ', array_map( 'intval', $comments ) );
4222          $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->comments SET comment_approved = %s WHERE comment_ID IN ($comments_in)", $status ) );
4223      }
4224  
4225      clean_comment_cache( array_keys( $statuses ) );
4226  
4227      delete_post_meta( $post_id, '_wp_trash_meta_comments_status' );
4228  
4229      /**
4230       * Fires after comments are restored for a post from the Trash.
4231       *
4232       * @since 2.9.0
4233       *
4234       * @param int $post_id Post ID.
4235       */
4236      do_action( 'untrashed_post_comments', $post_id );
4237  }
4238  
4239  /**
4240   * Retrieves the list of categories for a post.
4241   *
4242   * Compatibility layer for themes and plugins. Also an easy layer of abstraction
4243   * away from the complexity of the taxonomy layer.
4244   *
4245   * @since 2.1.0
4246   *
4247   * @see wp_get_object_terms()
4248   *
4249   * @param int   $post_id Optional. The Post ID. Does not default to the ID of the
4250   *                       global $post. Default 0.
4251   * @param array $args    Optional. Category query parameters. Default empty array.
4252   *                       See WP_Term_Query::__construct() for supported arguments.
4253   * @return array|WP_Error List of categories. If the `$fields` argument passed via `$args` is 'all' or
4254   *                        'all_with_object_id', an array of WP_Term objects will be returned. If `$fields`
4255   *                        is 'ids', an array of category IDs. If `$fields` is 'names', an array of category names.
4256   *                        WP_Error object if 'category' taxonomy doesn't exist.
4257   */
4258  function wp_get_post_categories( $post_id = 0, $args = array() ) {
4259      $post_id = (int) $post_id;
4260  
4261      $defaults = array( 'fields' => 'ids' );
4262      $args     = wp_parse_args( $args, $defaults );
4263  
4264      $cats = wp_get_object_terms( $post_id, 'category', $args );
4265      return $cats;
4266  }
4267  
4268  /**
4269   * Retrieves the tags for a post.
4270   *
4271   * There is only one default for this function, called 'fields' and by default
4272   * is set to 'all'. There are other defaults that can be overridden in
4273   * wp_get_object_terms().
4274   *
4275   * @since 2.3.0
4276   *
4277   * @param int   $post_id Optional. The Post ID. Does not default to the ID of the
4278   *                       global $post. Default 0.
4279   * @param array $args    Optional. Tag query parameters. Default empty array.
4280   *                       See WP_Term_Query::__construct() for supported arguments.
4281   * @return array|WP_Error Array of WP_Term objects on success or empty array if no tags were found.
4282   *                        WP_Error object if 'post_tag' taxonomy doesn't exist.
4283   */
4284  function wp_get_post_tags( $post_id = 0, $args = array() ) {
4285      return wp_get_post_terms( $post_id, 'post_tag', $args );
4286  }
4287  
4288  /**
4289   * Retrieves the terms for a post.
4290   *
4291   * @since 2.8.0
4292   *
4293   * @param int             $post_id  Optional. The Post ID. Does not default to the ID of the
4294   *                                  global $post. Default 0.
4295   * @param string|string[] $taxonomy Optional. The taxonomy slug or array of slugs for which
4296   *                                  to retrieve terms. Default 'post_tag'.
4297   * @param array           $args     {
4298   *     Optional. Term query parameters. See WP_Term_Query::__construct() for supported arguments.
4299   *
4300   *     @type string $fields Term fields to retrieve. Default 'all'.
4301   * }
4302   * @return array|WP_Error Array of WP_Term objects on success or empty array if no terms were found.
4303   *                        WP_Error object if `$taxonomy` doesn't exist.
4304   */
4305  function wp_get_post_terms( $post_id = 0, $taxonomy = 'post_tag', $args = array() ) {
4306      $post_id = (int) $post_id;
4307  
4308      $defaults = array( 'fields' => 'all' );
4309      $args     = wp_parse_args( $args, $defaults );
4310  
4311      $tags = wp_get_object_terms( $post_id, $taxonomy, $args );
4312  
4313      return $tags;
4314  }
4315  
4316  /**
4317   * Retrieves a number of recent posts.
4318   *
4319   * @since 1.0.0
4320   *
4321   * @see get_posts()
4322   *
4323   * @param array  $args   Optional. Arguments to retrieve posts. Default empty array.
4324   * @param string $output Optional. The required return type. One of OBJECT or ARRAY_A, which
4325   *                       correspond to a WP_Post object or an associative array, respectively.
4326   *                       Default ARRAY_A.
4327   * @return array|false Array of recent posts, where the type of each element is determined
4328   *                     by the `$output` parameter. Empty array on failure.
4329   */
4330  function wp_get_recent_posts( $args = array(), $output = ARRAY_A ) {
4331  
4332      if ( is_numeric( $args ) ) {
4333          _deprecated_argument( __FUNCTION__, '3.1.0', __( 'Passing an integer number of posts is deprecated. Pass an array of arguments instead.' ) );
4334          $args = array( 'numberposts' => absint( $args ) );
4335      }
4336  
4337      // Set default arguments.
4338      $defaults = array(
4339          'numberposts'      => 10,
4340          'offset'           => 0,
4341          'category'         => 0,
4342          'orderby'          => 'post_date',
4343          'order'            => 'DESC',
4344          'include'          => '',
4345          'exclude'          => '',
4346          'meta_key'         => '',
4347          'meta_value'       => '',
4348          'post_type'        => 'post',
4349          'post_status'      => 'draft, publish, future, pending, private',
4350          'suppress_filters' => true,
4351      );
4352  
4353      $parsed_args = wp_parse_args( $args, $defaults );
4354  
4355      $results = get_posts( $parsed_args );
4356  
4357      // Backward compatibility. Prior to 3.1 expected posts to be returned in array.
4358      if ( ARRAY_A === $output ) {
4359          foreach ( $results as $key => $result ) {
4360              $results[ $key ] = get_object_vars( $result );
4361          }
4362          return $results ? $results : array();
4363      }
4364  
4365      return $results ? $results : false;
4366  }
4367  
4368  /**
4369   * Inserts or update a post.
4370   *
4371   * If the $postarr parameter has 'ID' set to a value, then post will be updated.
4372   *
4373   * You can set the post date manually, by setting the values for 'post_date'
4374   * and 'post_date_gmt' keys. You can close the comments or open the comments by
4375   * setting the value for 'comment_status' key.
4376   *
4377   * @since 1.0.0
4378   * @since 2.6.0 Added the `$wp_error` parameter to allow a WP_Error to be returned on failure.
4379   * @since 4.2.0 Support was added for encoding emoji in the post title, content, and excerpt.
4380   * @since 4.4.0 A 'meta_input' array can now be passed to `$postarr` to add post meta data.
4381   * @since 5.6.0 Added the `$fire_after_hooks` parameter.
4382   *
4383   * @see sanitize_post()
4384   * @global wpdb $wpdb WordPress database abstraction object.
4385   *
4386   * @param array $postarr {
4387   *     An array of elements that make up a post to update or insert.
4388   *
4389   *     @type int    $ID                    The post ID. If equal to something other than 0,
4390   *                                         the post with that ID will be updated. Default 0.
4391   *     @type int    $post_author           The ID of the user who added the post. Default is
4392   *                                         the current user ID.
4393   *     @type string $post_date             The date of the post. Default is the current time.
4394   *     @type string $post_date_gmt         The date of the post in the GMT timezone. Default is
4395   *                                         the value of `$post_date`.
4396   *     @type string $post_content          The post content. Default empty.
4397   *     @type string $post_content_filtered The filtered post content. Default empty.
4398   *     @type string $post_title            The post title. Default empty.
4399   *     @type string $post_excerpt          The post excerpt. Default empty.
4400   *     @type string $post_status           The post status. Default 'draft'.
4401   *     @type string $post_type             The post type. Default 'post'.
4402   *     @type string $comment_status        Whether the post can accept comments. Accepts 'open' or 'closed'.
4403   *                                         Default is the value of 'default_comment_status' option.
4404   *     @type string $ping_status           Whether the post can accept pings. Accepts 'open' or 'closed'.
4405   *                                         Default is the value of 'default_ping_status' option.
4406   *     @type string $post_password         The password to access the post. Default empty.
4407   *     @type string $post_name             The post name. Default is the sanitized post title
4408   *                                         when creating a new post.
4409   *     @type string $to_ping               Space or carriage return-separated list of URLs to ping.
4410   *                                         Default empty.
4411   *     @type string $pinged                Space or carriage return-separated list of URLs that have
4412   *                                         been pinged. Default empty.
4413   *     @type int    $post_parent           Set this for the post it belongs to, if any. Default 0.
4414   *     @type int    $menu_order            The order the post should be displayed in. Default 0.
4415   *     @type string $post_mime_type        The mime type of the post. Default empty.
4416   *     @type string $guid                  Global Unique ID for referencing the post. Default empty.
4417   *     @type int    $import_id             The post ID to be used when inserting a new post.
4418   *                                         If specified, must not match any existing post ID. Default 0.
4419   *     @type int[]  $post_category         Array of category IDs.
4420   *                                         Defaults to value of the 'default_category' option.
4421   *     @type array  $tags_input            Array of tag names, slugs, or IDs. Default empty.
4422   *     @type array  $tax_input             An array of taxonomy terms keyed by their taxonomy name.
4423   *                                         If the taxonomy is hierarchical, the term list needs to be
4424   *                                         either an array of term IDs or a comma-separated string of IDs.
4425   *                                         If the taxonomy is non-hierarchical, the term list can be an array
4426   *                                         that contains term names or slugs, or a comma-separated string
4427   *                                         of names or slugs. This is because, in hierarchical taxonomy,
4428   *                                         child terms can have the same names with different parent terms,
4429   *                                         so the only way to connect them is using ID. Default empty.
4430   *     @type array  $meta_input            Array of post meta values keyed by their post meta key. Default empty.
4431   *     @type string $page_template         Page template to use.
4432   * }
4433   * @param bool  $wp_error         Optional. Whether to return a WP_Error on failure. Default false.
4434   * @param bool  $fire_after_hooks Optional. Whether to fire the after insert hooks. Default true.
4435   * @return int|WP_Error The post ID on success. The value 0 or WP_Error on failure.
4436   */
4437  function wp_insert_post( $postarr, $wp_error = false, $fire_after_hooks = true ) {
4438      global $wpdb;
4439  
4440      // Capture original pre-sanitized array for passing into filters.
4441      $unsanitized_postarr = $postarr;
4442  
4443      $user_id = get_current_user_id();
4444  
4445      $defaults = array(
4446          'post_author'           => $user_id,
4447          'post_content'          => '',
4448          'post_content_filtered' => '',
4449          'post_title'            => '',
4450          'post_excerpt'          => '',
4451          'post_status'           => 'draft',
4452          'post_type'             => 'post',
4453          'comment_status'        => '',
4454          'ping_status'           => '',
4455          'post_password'         => '',
4456          'to_ping'               => '',
4457          'pinged'                => '',
4458          'post_parent'           => 0,
4459          'menu_order'            => 0,
4460          'guid'                  => '',
4461          'import_id'             => 0,
4462          'context'               => '',
4463          'post_date'             => '',
4464          'post_date_gmt'         => '',
4465      );
4466  
4467      $postarr = wp_parse_args( $postarr, $defaults );
4468  
4469      unset( $postarr['filter'] );
4470  
4471      $postarr = sanitize_post( $postarr, 'db' );
4472  
4473      // Are we updating or creating?
4474      $post_id = 0;
4475      $update  = false;
4476      $guid    = $postarr['guid'];
4477  
4478      if ( ! empty( $postarr['ID'] ) ) {
4479          $update = true;
4480  
4481          // Get the post ID and GUID.
4482          $post_id     = $postarr['ID'];
4483          $post_before = get_post( $post_id );
4484  
4485          if ( is_null( $post_before ) ) {
4486              if ( $wp_error ) {
4487                  return new WP_Error( 'invalid_post', __( 'Invalid post ID.' ) );
4488              }
4489              return 0;
4490          }
4491  
4492          $guid            = get_post_field( 'guid', $post_id );
4493          $previous_status = get_post_field( 'post_status', $post_id );
4494      } else {
4495          $previous_status = 'new';
4496          $post_before     = null;
4497      }
4498  
4499      $post_type = empty( $postarr['post_type'] ) ? 'post' : $postarr['post_type'];
4500  
4501      $post_title   = $postarr['post_title'];
4502      $post_content = $postarr['post_content'];
4503      $post_excerpt = $postarr['post_excerpt'];
4504  
4505      if ( isset( $postarr['post_name'] ) ) {
4506          $post_name = $postarr['post_name'];
4507      } elseif ( $update ) {
4508          // For an update, don't modify the post_name if it wasn't supplied as an argument.
4509          $post_name = $post_before->post_name;
4510      }
4511  
4512      $maybe_empty = 'attachment' !== $post_type
4513          && ! $post_content && ! $post_title && ! $post_excerpt
4514          && post_type_supports( $post_type, 'editor' )
4515          && post_type_supports( $post_type, 'title' )
4516          && post_type_supports( $post_type, 'excerpt' );
4517  
4518      /**
4519       * Filters whether the post should be considered "empty".
4520       *
4521       * The post is considered "empty" if both:
4522       * 1. The post type supports the title, editor, and excerpt fields
4523       * 2. The title, editor, and excerpt fields are all empty
4524       *
4525       * Returning a truthy value from the filter will effectively short-circuit
4526       * the new post being inserted and return 0. If $wp_error is true, a WP_Error
4527       * will be returned instead.
4528       *
4529       * @since 3.3.0
4530       *
4531       * @param bool  $maybe_empty Whether the post should be considered "empty".
4532       * @param array $postarr     Array of post data.
4533       */
4534      if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) {
4535          if ( $wp_error ) {
4536              return new WP_Error( 'empty_content', __( 'Content, title, and excerpt are empty.' ) );
4537          } else {
4538              return 0;
4539          }
4540      }
4541  
4542      $post_status = empty( $postarr['post_status'] ) ? 'draft' : $postarr['post_status'];
4543  
4544      if ( 'attachment' === $post_type && ! in_array( $post_status, array( 'inherit', 'private', 'trash', 'auto-draft' ), true ) ) {
4545          $post_status = 'inherit';
4546      }
4547  
4548      if ( ! empty( $postarr['post_category'] ) ) {
4549          // Filter out empty terms.
4550          $post_category = array_filter( $postarr['post_category'] );
4551      } elseif ( $update && ! isset( $postarr['post_category'] ) ) {
4552          $post_category = $post_before->post_category;
4553      }
4554  
4555      // Make sure we set a valid category.
4556      if ( empty( $post_category ) || 0 === count( $post_category ) || ! is_array( $post_category ) ) {
4557          // 'post' requires at least one category.
4558          if ( 'post' === $post_type && 'auto-draft' !== $post_status ) {
4559              $post_category = array( get_option( 'default_category' ) );
4560          } else {
4561              $post_category = array();
4562          }
4563      }
4564  
4565      /*
4566       * Don't allow contributors to set the post slug for pending review posts.
4567       *
4568       * For new posts check the primitive capability, for updates check the meta capability.
4569       */
4570      if ( 'pending' === $post_status ) {
4571          $post_type_object = get_post_type_object( $post_type );
4572  
4573          if ( ! $update && $post_type_object && ! current_user_can( $post_type_object->cap->publish_posts ) ) {
4574              $post_name = '';
4575          } elseif ( $update && ! current_user_can( 'publish_post', $post_id ) ) {
4576              $post_name = '';
4577          }
4578      }
4579  
4580      /*
4581       * Create a valid post name. Drafts and pending posts are allowed to have
4582       * an empty post name.
4583       */
4584      if ( empty( $post_name ) ) {
4585          if ( ! in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ), true ) ) {
4586              $post_name = sanitize_title( $post_title );
4587          } else {
4588              $post_name = '';
4589          }
4590      } else {
4591          // On updates, we need to check to see if it's using the old, fixed sanitization context.
4592          $check_name = sanitize_title( $post_name, '', 'old-save' );
4593  
4594          if ( $update
4595              && strtolower( urlencode( $post_name ) ) === $check_name
4596              && get_post_field( 'post_name', $post_id ) === $check_name
4597          ) {
4598              $post_name = $check_name;
4599          } else { // New post, or slug has changed.
4600              $post_name = sanitize_title( $post_name );
4601          }
4602      }
4603  
4604      /*
4605       * Resolve the post date from any provided post date or post date GMT strings;
4606       * if none are provided, the date will be set to now.
4607       */
4608      $post_date = wp_resolve_post_date( $postarr['post_date'], $postarr['post_date_gmt'] );
4609  
4610      if ( ! $post_date ) {
4611          if ( $wp_error ) {
4612              return new WP_Error( 'invalid_date', __( 'Invalid date.' ) );
4613          } else {
4614              return 0;
4615          }
4616      }
4617  
4618      if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' === $postarr['post_date_gmt'] ) {
4619          if ( ! in_array( $post_status, get_post_stati( array( 'date_floating' => true ) ), true ) ) {
4620              $post_date_gmt = get_gmt_from_date( $post_date );
4621          } else {
4622              $post_date_gmt = '0000-00-00 00:00:00';
4623          }
4624      } else {
4625          $post_date_gmt = $postarr['post_date_gmt'];
4626      }
4627  
4628      if ( $update || '0000-00-00 00:00:00' === $post_date ) {
4629          $post_modified     = current_time( 'mysql' );
4630          $post_modified_gmt = current_time( 'mysql', 1 );
4631      } else {
4632          $post_modified     = $post_date;
4633          $post_modified_gmt = $post_date_gmt;
4634      }
4635  
4636      if ( 'attachment' !== $post_type ) {
4637          $now = gmdate( 'Y-m-d H:i:s' );
4638  
4639          if ( 'publish' === $post_status ) {
4640              if ( strtotime( $post_date_gmt ) - strtotime( $now ) >= MINUTE_IN_SECONDS ) {
4641                  $post_status = 'future';
4642              }
4643          } elseif ( 'future' === $post_status ) {
4644              if ( strtotime( $post_date_gmt ) - strtotime( $now ) < MINUTE_IN_SECONDS ) {
4645                  $post_status = 'publish';
4646              }
4647          }
4648      }
4649  
4650      // Comment status.
4651      if ( empty( $postarr['comment_status'] ) ) {
4652          if ( $update ) {
4653              $comment_status = 'closed';
4654          } else {
4655              $comment_status = get_default_comment_status( $post_type );
4656          }
4657      } else {
4658          $comment_status = $postarr['comment_status'];
4659      }
4660  
4661      // These variables are needed by compact() later.
4662      $post_content_filtered = $postarr['post_content_filtered'];
4663      $post_author           = isset( $postarr['post_author'] ) ? $postarr['post_author'] : $user_id;
4664      $ping_status           = empty( $postarr['ping_status'] ) ? get_default_comment_status( $post_type, 'pingback' ) : $postarr['ping_status'];
4665      $to_ping               = isset( $postarr['to_ping'] ) ? sanitize_trackback_urls( $postarr['to_ping'] ) : '';
4666      $pinged                = isset( $postarr['pinged'] ) ? $postarr['pinged'] : '';
4667      $import_id             = isset( $postarr['import_id'] ) ? $postarr['import_id'] : 0;
4668  
4669      /*
4670       * The 'wp_insert_post_parent' filter expects all variables to be present.
4671       * Previously, these variables would have already been extracted
4672       */
4673      if ( isset( $postarr['menu_order'] ) ) {
4674          $menu_order = (int) $postarr['menu_order'];
4675      } else {
4676          $menu_order = 0;
4677      }
4678  
4679      $post_password = isset( $postarr['post_password'] ) ? $postarr['post_password'] : '';
4680      if ( 'private' === $post_status ) {
4681          $post_password = '';
4682      }
4683  
4684      if ( isset( $postarr['post_parent'] ) ) {
4685          $post_parent = (int) $postarr['post_parent'];
4686      } else {
4687          $post_parent = 0;
4688      }
4689  
4690      $new_postarr = array_merge(
4691          array(
4692              'ID' => $post_id,
4693          ),
4694          compact( array_diff( array_keys( $defaults ), array( 'context', 'filter' ) ) )
4695      );
4696  
4697      /**
4698       * Filters the post parent -- used to check for and prevent hierarchy loops.
4699       *
4700       * @since 3.1.0
4701       *
4702       * @param int   $post_parent Post parent ID.
4703       * @param int   $post_id     Post ID.
4704       * @param array $new_postarr Array of parsed post data.
4705       * @param array $postarr     Array of sanitized, but otherwise unmodified post data.
4706       */
4707      $post_parent = apply_filters( 'wp_insert_post_parent', $post_parent, $post_id, $new_postarr, $postarr );
4708  
4709      /*
4710       * If the post is being untrashed and it has a desired slug stored in post meta,
4711       * reassign it.
4712       */
4713      if ( 'trash' === $previous_status && 'trash' !== $post_status ) {
4714          $desired_post_slug = get_post_meta( $post_id, '_wp_desired_post_slug', true );
4715  
4716          if ( $desired_post_slug ) {
4717              delete_post_meta( $post_id, '_wp_desired_post_slug' );
4718              $post_name = $desired_post_slug;
4719          }
4720      }
4721  
4722      // If a trashed post has the desired slug, change it and let this post have it.
4723      if ( 'trash' !== $post_status && $post_name ) {
4724          /**
4725           * Filters whether or not to add a `__trashed` suffix to trashed posts that match the name of the updated post.
4726           *
4727           * @since 5.4.0
4728           *
4729           * @param bool   $add_trashed_suffix Whether to attempt to add the suffix.
4730           * @param string $post_name          The name of the post being updated.
4731           * @param int    $post_id            Post ID.
4732           */
4733          $add_trashed_suffix = apply_filters( 'add_trashed_suffix_to_trashed_posts', true, $post_name, $post_id );
4734  
4735          if ( $add_trashed_suffix ) {
4736              wp_add_trashed_suffix_to_post_name_for_trashed_posts( $post_name, $post_id );
4737          }
4738      }
4739  
4740      // When trashing an existing post, change its slug to allow non-trashed posts to use it.
4741      if ( 'trash' === $post_status && 'trash' !== $previous_status && 'new' !== $previous_status ) {
4742          $post_name = wp_add_trashed_suffix_to_post_name_for_post( $post_id );
4743      }
4744  
4745      $post_name = wp_unique_post_slug( $post_name, $post_id, $post_status, $post_type, $post_parent );
4746  
4747      // Don't unslash.
4748      $post_mime_type = isset( $postarr['post_mime_type'] ) ? $postarr['post_mime_type'] : '';
4749  
4750      // Expected_slashed (everything!).
4751      $data = compact(
4752          'post_author',
4753          'post_date',
4754          'post_date_gmt',
4755          'post_content',
4756          'post_content_filtered',
4757          'post_title',
4758          'post_excerpt',
4759          'post_status',
4760          'post_type',
4761          'comment_status',
4762          'ping_status',
4763          'post_password',
4764          'post_name',
4765          'to_ping',
4766          'pinged',
4767          'post_modified',
4768          'post_modified_gmt',
4769          'post_parent',
4770          'menu_order',
4771          'post_mime_type',
4772          'guid'
4773      );
4774  
4775      $emoji_fields = array( 'post_title', 'post_content', 'post_excerpt' );
4776  
4777      foreach ( $emoji_fields as $emoji_field ) {
4778          if ( isset( $data[ $emoji_field ] ) ) {
4779              $charset = $wpdb->get_col_charset( $wpdb->posts, $emoji_field );
4780  
4781              if ( 'utf8' === $charset ) {
4782                  $data[ $emoji_field ] = wp_encode_emoji( $data[ $emoji_field ] );
4783              }
4784          }
4785      }
4786  
4787      if ( 'attachment' === $post_type ) {
4788          /**
4789           * Filters attachment post data before it is updated in or added to the database.
4790           *
4791           * @since 3.9.0
4792           * @since 5.4.1 The `$unsanitized_postarr` parameter was added.
4793           * @since 6.0.0 The `$update` parameter was added.
4794           *
4795           * @param array $data                An array of slashed, sanitized, and processed attachment post data.
4796           * @param array $postarr             An array of slashed and sanitized attachment post data, but not processed.
4797           * @param array $unsanitized_postarr An array of slashed yet *unsanitized* and unprocessed attachment post data
4798           *                                   as originally passed to wp_insert_post().
4799           * @param bool  $update              Whether this is an existing attachment post being updated.
4800           */
4801          $data = apply_filters( 'wp_insert_attachment_data', $data, $postarr, $unsanitized_postarr, $update );
4802      } else {
4803          /**
4804           * Filters slashed post data just before it is inserted into the database.
4805           *
4806           * @since 2.7.0
4807           * @since 5.4.1 The `$unsanitized_postarr` parameter was added.
4808           * @since 6.0.0 The `$update` parameter was added.
4809           *
4810           * @param array $data                An array of slashed, sanitized, and processed post data.
4811           * @param array $postarr             An array of sanitized (and slashed) but otherwise unmodified post data.
4812           * @param array $unsanitized_postarr An array of slashed yet *unsanitized* and unprocessed post data as
4813           *                                   originally passed to wp_insert_post().
4814           * @param bool  $update              Whether this is an existing post being updated.
4815           */
4816          $data = apply_filters( 'wp_insert_post_data', $data, $postarr, $unsanitized_postarr, $update );
4817      }
4818  
4819      $data  = wp_unslash( $data );
4820      $where = array( 'ID' => $post_id );
4821  
4822      if ( $update ) {
4823          /**
4824           * Fires immediately before an existing post is updated in the database.
4825           *
4826           * @since 2.5.0
4827           *
4828           * @param int   $post_id Post ID.
4829           * @param array $data    Array of unslashed post data.
4830           */
4831          do_action( 'pre_post_update', $post_id, $data );
4832  
4833          if ( false === $wpdb->update( $wpdb->posts, $data, $where ) ) {
4834              if ( $wp_error ) {
4835                  if ( 'attachment' === $post_type ) {
4836                      $message = __( 'Could not update attachment in the database.' );
4837                  } else {
4838                      $message = __( 'Could not update post in the database.' );
4839                  }
4840  
4841                  return new WP_Error( 'db_update_error', $message, $wpdb->last_error );
4842              } else {
4843                  return 0;
4844              }
4845          }
4846      } else {
4847          // If there is a suggested ID, use it if not already present.
4848          if ( ! empty( $import_id ) ) {
4849              $import_id = (int) $import_id;
4850  
4851              if ( ! $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE ID = %d", $import_id ) ) ) {
4852                  $data['ID'] = $import_id;
4853              }
4854          }
4855  
4856          if ( false === $wpdb->insert( $wpdb->posts, $data ) ) {
4857              if ( $wp_error ) {
4858                  if ( 'attachment' === $post_type ) {
4859                      $message = __( 'Could not insert attachment into the database.' );
4860                  } else {
4861                      $message = __( 'Could not insert post into the database.' );
4862                  }
4863  
4864                  return new WP_Error( 'db_insert_error', $message, $wpdb->last_error );
4865              } else {
4866                  return 0;
4867              }
4868          }
4869  
4870          $post_id = (int) $wpdb->insert_id;
4871  
4872          // Use the newly generated $post_id.
4873          $where = array( 'ID' => $post_id );
4874      }
4875  
4876      if ( empty( $data['post_name'] ) && ! in_array( $data['post_status'], array( 'draft', 'pending', 'auto-draft' ), true ) ) {
4877          $data['post_name'] = wp_unique_post_slug( sanitize_title( $data['post_title'], $post_id ), $post_id, $data['post_status'], $post_type, $post_parent );
4878  
4879          $wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
4880          clean_post_cache( $post_id );
4881      }
4882  
4883      if ( is_object_in_taxonomy( $post_type, 'category' ) ) {
4884          wp_set_post_categories( $post_id, $post_category );
4885      }
4886  
4887      if ( isset( $postarr['tags_input'] ) && is_object_in_taxonomy( $post_type, 'post_tag' ) ) {
4888          wp_set_post_tags( $post_id, $postarr['tags_input'] );
4889      }
4890  
4891      // Add default term for all associated custom taxonomies.
4892      if ( 'auto-draft' !== $post_status ) {
4893          foreach ( get_object_taxonomies( $post_type, 'object' ) as $taxonomy => $tax_object ) {
4894  
4895              if ( ! empty( $tax_object->default_term ) ) {
4896  
4897                  // Filter out empty terms.
4898                  if ( isset( $postarr['tax_input'][ $taxonomy ] ) && is_array( $postarr['tax_input'][ $taxonomy ] ) ) {
4899                      $postarr['tax_input'][ $taxonomy ] = array_filter( $postarr['tax_input'][ $taxonomy ] );
4900                  }
4901  
4902                  // Passed custom taxonomy list overwrites the existing list if not empty.
4903                  $terms = wp_get_object_terms( $post_id, $taxonomy, array( 'fields' => 'ids' ) );
4904                  if ( ! empty( $terms ) && empty( $postarr['tax_input'][ $taxonomy ] ) ) {
4905                      $postarr['tax_input'][ $taxonomy ] = $terms;
4906                  }
4907  
4908                  if ( empty( $postarr['tax_input'][ $taxonomy ] ) ) {
4909                      $default_term_id = get_option( 'default_term_' . $taxonomy );
4910                      if ( ! empty( $default_term_id ) ) {
4911                          $postarr['tax_input'][ $taxonomy ] = array( (int) $default_term_id );
4912                      }
4913                  }
4914              }
4915          }
4916      }
4917  
4918      // New-style support for all custom taxonomies.
4919      if ( ! empty( $postarr['tax_input'] ) ) {
4920          foreach ( $postarr['tax_input'] as $taxonomy => $tags ) {
4921              $taxonomy_obj = get_taxonomy( $taxonomy );
4922  
4923              if ( ! $taxonomy_obj ) {
4924                  /* translators: %s: Taxonomy name. */
4925                  _doing_it_wrong( __FUNCTION__, sprintf( __( 'Invalid taxonomy: %s.' ), $taxonomy ), '4.4.0' );
4926                  continue;
4927              }
4928  
4929              // array = hierarchical, string = non-hierarchical.
4930              if ( is_array( $tags ) ) {
4931                  $tags = array_filter( $tags );
4932              }
4933  
4934              if ( current_user_can( $taxonomy_obj->cap->assign_terms ) ) {
4935                  wp_set_post_terms( $post_id, $tags, $taxonomy );
4936              }
4937          }
4938      }
4939  
4940      if ( ! empty( $postarr['meta_input'] ) ) {
4941          foreach ( $postarr['meta_input'] as $field => $value ) {
4942              update_post_meta( $post_id, $field, $value );
4943          }
4944      }
4945  
4946      $current_guid = get_post_field( 'guid', $post_id );
4947  
4948      // Set GUID.
4949      if ( ! $update && '' === $current_guid ) {
4950          $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post_id ) ), $where );
4951      }
4952  
4953      if ( 'attachment' === $postarr['post_type'] ) {
4954          if ( ! empty( $postarr['file'] ) ) {
4955              update_attached_file( $post_id, $postarr['file'] );
4956          }
4957  
4958          if ( ! empty( $postarr['context'] ) ) {
4959              add_post_meta( $post_id, '_wp_attachment_context', $postarr['context'], true );
4960          }
4961      }
4962  
4963      // Set or remove featured image.
4964      if ( isset( $postarr['_thumbnail_id'] ) ) {
4965          $thumbnail_support = current_theme_supports( 'post-thumbnails', $post_type ) && post_type_supports( $post_type, 'thumbnail' ) || 'revision' === $post_type;
4966  
4967          if ( ! $thumbnail_support && 'attachment' === $post_type && $post_mime_type ) {
4968              if ( wp_attachment_is( 'audio', $post_id ) ) {
4969                  $thumbnail_support = post_type_supports( 'attachment:audio', 'thumbnail' ) || current_theme_supports( 'post-thumbnails', 'attachment:audio' );
4970              } elseif ( wp_attachment_is( 'video', $post_id ) ) {
4971                  $thumbnail_support = post_type_supports( 'attachment:video', 'thumbnail' ) || current_theme_supports( 'post-thumbnails', 'attachment:video' );
4972              }
4973          }
4974  
4975          if ( $thumbnail_support ) {
4976              $thumbnail_id = (int) $postarr['_thumbnail_id'];
4977              if ( -1 === $thumbnail_id ) {
4978                  delete_post_thumbnail( $post_id );
4979              } else {
4980                  set_post_thumbnail( $post_id, $thumbnail_id );
4981              }
4982          }
4983      }
4984  
4985      clean_post_cache( $post_id );
4986  
4987      $post = get_post( $post_id );
4988  
4989      if ( ! empty( $postarr['page_template'] ) ) {
4990          $post->page_template = $postarr['page_template'];
4991          $page_templates      = wp_get_theme()->get_page_templates( $post );
4992  
4993          if ( 'default' !== $postarr['page_template'] && ! isset( $page_templates[ $postarr['page_template'] ] ) ) {
4994              if ( $wp_error ) {
4995                  return new WP_Error( 'invalid_page_template', __( 'Invalid page template.' ) );
4996              }
4997  
4998              update_post_meta( $post_id, '_wp_page_template', 'default' );
4999          } else {
5000              update_post_meta( $post_id, '_wp_page_template', $postarr['page_template'] );
5001          }
5002      }
5003  
5004      if ( 'attachment' !== $postarr['post_type'] ) {
5005          wp_transition_post_status( $data['post_status'], $previous_status, $post );
5006      } else {
5007          if ( $update ) {
5008              /**
5009               * Fires once an existing attachment has been updated.
5010               *
5011               * @since 2.0.0
5012               *
5013               * @param int $post_id Attachment ID.
5014               */
5015              do_action( 'edit_attachment', $post_id );
5016  
5017              $post_after = get_post( $post_id );
5018  
5019              /**
5020               * Fires once an existing attachment has been updated.
5021               *
5022               * @since 4.4.0
5023               *
5024               * @param int     $post_id      Post ID.
5025               * @param WP_Post $post_after   Post object following the update.
5026               * @param WP_Post $post_before  Post object before the update.
5027               */
5028              do_action( 'attachment_updated', $post_id, $post_after, $post_before );
5029          } else {
5030  
5031              /**
5032               * Fires once an attachment has been added.
5033               *
5034               * @since 2.0.0
5035               *
5036               * @param int $post_id Attachment ID.
5037               */
5038              do_action( 'add_attachment', $post_id );
5039          }
5040  
5041          return $post_id;
5042      }
5043  
5044      if ( $update ) {
5045          /**
5046           * Fires once an existing post has been updated.
5047           *
5048           * The dynamic portion of the hook name, `$post->post_type`, refers to
5049           * the post type slug.
5050           *
5051           * Possible hook names include:
5052           *
5053           *  - `edit_post_post`
5054           *  - `edit_post_page`
5055           *
5056           * @since 5.1.0
5057           *
5058           * @param int     $post_id Post ID.
5059           * @param WP_Post $post    Post object.
5060           */
5061          do_action( "edit_post_{$post->post_type}", $post_id, $post );
5062  
5063          /**
5064           * Fires once an existing post has been updated.
5065           *
5066           * @since 1.2.0
5067           *
5068           * @param int     $post_id Post ID.
5069           * @param WP_Post $post    Post object.
5070           */
5071          do_action( 'edit_post', $post_id, $post );
5072  
5073          $post_after = get_post( $post_id );
5074  
5075          /**
5076           * Fires once an existing post has been updated.
5077           *
5078           * @since 3.0.0
5079           *
5080           * @param int     $post_id      Post ID.
5081           * @param WP_Post $post_after   Post object following the update.
5082           * @param WP_Post $post_before  Post object before the update.
5083           */
5084          do_action( 'post_updated', $post_id, $post_after, $post_before );
5085      }
5086  
5087      /**
5088       * Fires once a post has been saved.
5089       *
5090       * The dynamic portion of the hook name, `$post->post_type`, refers to
5091       * the post type slug.
5092       *
5093       * Possible hook names include:
5094       *
5095       *  - `save_post_post`
5096       *  - `save_post_page`
5097       *
5098       * @since 3.7.0
5099       *
5100       * @param int     $post_id Post ID.
5101       * @param WP_Post $post    Post object.
5102       * @param bool    $update  Whether this is an existing post being updated.
5103       */
5104      do_action( "save_post_{$post->post_type}", $post_id, $post, $update );
5105  
5106      /**
5107       * Fires once a post has been saved.
5108       *
5109       * @since 1.5.0
5110       *
5111       * @param int     $post_id Post ID.
5112       * @param WP_Post $post    Post object.
5113       * @param bool    $update  Whether this is an existing post being updated.
5114       */
5115      do_action( 'save_post', $post_id, $post, $update );
5116  
5117      /**
5118       * Fires once a post has been saved.
5119       *
5120       * @since 2.0.0
5121       *
5122       * @param int     $post_id Post ID.
5123       * @param WP_Post $post    Post object.
5124       * @param bool    $update  Whether this is an existing post being updated.
5125       */
5126      do_action( 'wp_insert_post', $post_id, $post, $update );
5127  
5128      if ( $fire_after_hooks ) {
5129          wp_after_insert_post( $post, $update, $post_before );
5130      }
5131  
5132      return $post_id;
5133  }
5134  
5135  /**
5136   * Updates a post with new post data.
5137   *
5138   * The date does not have to be set for drafts. You can set the date and it will
5139   * not be overridden.
5140   *
5141   * @since 1.0.0
5142   * @since 3.5.0 Added the `$wp_error` parameter to allow a WP_Error to be returned on failure.
5143   * @since 5.6.0 Added the `$fire_after_hooks` parameter.
5144   *
5145   * @param array|object $postarr          Optional. Post data. Arrays are expected to be escaped,
5146   *                                       objects are not. See wp_insert_post() for accepted arguments.
5147   *                                       Default array.
5148   * @param bool         $wp_error         Optional. Whether to return a WP_Error on failure. Default false.
5149   * @param bool         $fire_after_hooks Optional. Whether to fire the after insert hooks. Default true.
5150   * @return int|WP_Error The post ID on success. The value 0 or WP_Error on failure.
5151   */
5152  function wp_update_post( $postarr = array(), $wp_error = false, $fire_after_hooks = true ) {
5153      if ( is_object( $postarr ) ) {
5154          // Non-escaped post was passed.
5155          $postarr = get_object_vars( $postarr );
5156          $postarr = wp_slash( $postarr );
5157      }
5158  
5159      // First, get all of the original fields.
5160      $post = get_post( $postarr['ID'], ARRAY_A );
5161  
5162      if ( is_null( $post ) ) {
5163          if ( $wp_error ) {
5164              return new WP_Error( 'invalid_post', __( 'Invalid post ID.' ) );
5165          }
5166          return 0;
5167      }
5168  
5169      // Escape data pulled from DB.
5170      $post = wp_slash( $post );
5171  
5172      // Passed post category list overwrites existing category list if not empty.
5173      if ( isset( $postarr['post_category'] ) && is_array( $postarr['post_category'] )
5174          && count( $postarr['post_category'] ) > 0
5175      ) {
5176          $post_cats = $postarr['post_category'];
5177      } else {
5178          $post_cats = $post['post_category'];
5179      }
5180  
5181      // Drafts shouldn't be assigned a date unless explicitly done so by the user.
5182      if ( isset( $post['post_status'] )
5183          && in_array( $post['post_status'], array( 'draft', 'pending', 'auto-draft' ), true )
5184          && empty( $postarr['edit_date'] ) && ( '0000-00-00 00:00:00' === $post['post_date_gmt'] )
5185      ) {
5186          $clear_date = true;
5187      } else {
5188          $clear_date = false;
5189      }
5190  
5191      // Merge old and new fields with new fields overwriting old ones.
5192      $postarr                  = array_merge( $post, $postarr );
5193      $postarr['post_category'] = $post_cats;
5194      if ( $clear_date ) {
5195          $postarr['post_date']     = current_time( 'mysql' );
5196          $postarr['post_date_gmt'] = '';
5197      }
5198  
5199      if ( 'attachment' === $postarr['post_type'] ) {
5200          return wp_insert_attachment( $postarr, false, 0, $wp_error );
5201      }
5202  
5203      // Discard 'tags_input' parameter if it's the same as existing post tags.
5204      if ( isset( $postarr['tags_input'] ) && is_object_in_taxonomy( $postarr['post_type'], 'post_tag' ) ) {
5205          $tags      = get_the_terms( $postarr['ID'], 'post_tag' );
5206          $tag_names = array();
5207  
5208          if ( $tags && ! is_wp_error( $tags ) ) {
5209              $tag_names = wp_list_pluck( $tags, 'name' );
5210          }
5211  
5212          if ( $postarr['tags_input'] === $tag_names ) {
5213              unset( $postarr['tags_input'] );
5214          }
5215      }
5216  
5217      return wp_insert_post( $postarr, $wp_error, $fire_after_hooks );
5218  }
5219  
5220  /**
5221   * Publishes a post by transitioning the post status.
5222   *
5223   * @since 2.1.0
5224   *
5225   * @global wpdb $wpdb WordPress database abstraction object.
5226   *
5227   * @param int|WP_Post $post Post ID or post object.
5228   */
5229  function wp_publish_post( $post ) {
5230      global $wpdb;
5231  
5232      $post = get_post( $post );
5233  
5234      if ( ! $post ) {
5235          return;
5236      }
5237  
5238      if ( 'publish' === $post->post_status ) {
5239          return;
5240      }
5241  
5242      $post_before = get_post( $post->ID );
5243  
5244      // Ensure at least one term is applied for taxonomies with a default term.
5245      foreach ( get_object_taxonomies( $post->post_type, 'object' ) as $taxonomy => $tax_object ) {
5246          // Skip taxonomy if no default term is set.
5247          if (
5248              'category' !== $taxonomy &&
5249              empty( $tax_object->default_term )
5250          ) {
5251              continue;
5252          }
5253  
5254          // Do not modify previously set terms.
5255          if ( ! empty( get_the_terms( $post, $taxonomy ) ) ) {
5256              continue;
5257          }
5258  
5259          if ( 'category' === $taxonomy ) {
5260              $default_term_id = (int) get_option( 'default_category', 0 );
5261          } else {
5262              $default_term_id = (int) get_option( 'default_term_' . $taxonomy, 0 );
5263          }
5264  
5265          if ( ! $default_term_id ) {
5266              continue;
5267          }
5268          wp_set_post_terms( $post->ID, array( $default_term_id ), $taxonomy );
5269      }
5270  
5271      $wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post->ID ) );
5272  
5273      clean_post_cache( $post->ID );
5274  
5275      $old_status        = $post->post_status;
5276      $post->post_status = 'publish';
5277      wp_transition_post_status( 'publish', $old_status, $post );
5278  
5279      /** This action is documented in wp-includes/post.php */
5280      do_action( "edit_post_{$post->post_type}", $post->ID, $post );
5281  
5282      /** This action is documented in wp-includes/post.php */
5283      do_action( 'edit_post', $post->ID, $post );
5284  
5285      /** This action is documented in wp-includes/post.php */
5286      do_action( "save_post_{$post->post_type}", $post->ID, $post, true );
5287  
5288      /** This action is documented in wp-includes/post.php */
5289      do_action( 'save_post', $post->ID, $post, true );
5290  
5291      /** This action is documented in wp-includes/post.php */
5292      do_action( 'wp_insert_post', $post->ID, $post, true );
5293  
5294      wp_after_insert_post( $post, true, $post_before );
5295  }
5296  
5297  /**
5298   * Publishes future post and make sure post ID has future post status.
5299   *
5300   * Invoked by cron 'publish_future_post' event. This safeguard prevents cron
5301   * from publishing drafts, etc.
5302   *
5303   * @since 2.5.0
5304   *
5305   * @param int|WP_Post $post Post ID or post object.
5306   */
5307  function check_and_publish_future_post( $post ) {
5308      $post = get_post( $post );
5309  
5310      if ( ! $post ) {
5311          return;
5312      }
5313  
5314      if ( 'future' !== $post->post_status ) {
5315          return;
5316      }
5317  
5318      $time = strtotime( $post->post_date_gmt . ' GMT' );
5319  
5320      // Uh oh, someone jumped the gun!
5321      if ( $time > time() ) {
5322          wp_clear_scheduled_hook( 'publish_future_post', array( $post->ID ) ); // Clear anything else in the system.
5323          wp_schedule_single_event( $time, 'publish_future_post', array( $post->ID ) );
5324          return;
5325      }
5326  
5327      // wp_publish_post() returns no meaningful value.
5328      wp_publish_post( $post->ID );
5329  }
5330  
5331  /**
5332   * Uses wp_checkdate to return a valid Gregorian-calendar value for post_date.
5333   * If post_date is not provided, this first checks post_date_gmt if provided,
5334   * then falls back to use the current time.
5335   *
5336   * For back-compat purposes in wp_insert_post, an empty post_date and an invalid
5337   * post_date_gmt will continue to return '1970-01-01 00:00:00' rather than false.
5338   *
5339   * @since 5.7.0
5340   *
5341   * @param string $post_date     The date in mysql format (`Y-m-d H:i:s`).
5342   * @param string $post_date_gmt The GMT date in mysql format (`Y-m-d H:i:s`).
5343   * @return string|false A valid Gregorian-calendar date string, or false on failure.
5344   */
5345  function wp_resolve_post_date( $post_date = '', $post_date_gmt = '' ) {
5346      // If the date is empty, set the date to now.
5347      if ( empty( $post_date ) || '0000-00-00 00:00:00' === $post_date ) {
5348          if ( empty( $post_date_gmt ) || '0000-00-00 00:00:00' === $post_date_gmt ) {
5349              $post_date = current_time( 'mysql' );
5350          } else {
5351              $post_date = get_date_from_gmt( $post_date_gmt );
5352          }
5353      }
5354  
5355      // Validate the date.
5356      $month = (int) substr( $post_date, 5, 2 );
5357      $day   = (int) substr( $post_date, 8, 2 );
5358      $year  = (int) substr( $post_date, 0, 4 );
5359  
5360      $valid_date = wp_checkdate( $month, $day, $year, $post_date );
5361  
5362      if ( ! $valid_date ) {
5363          return false;
5364      }
5365      return $post_date;
5366  }
5367  
5368  /**
5369   * Computes a unique slug for the post, when given the desired slug and some post details.
5370   *
5371   * @since 2.8.0
5372   *
5373   * @global wpdb       $wpdb       WordPress database abstraction object.
5374   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
5375   *
5376   * @param string $slug        The desired slug (post_name).
5377   * @param int    $post_id     Post ID.
5378   * @param string $post_status No uniqueness checks are made if the post is still draft or pending.
5379   * @param string $post_type   Post type.
5380   * @param int    $post_parent Post parent ID.
5381   * @return string Unique slug for the post, based on $post_name (with a -1, -2, etc. suffix)
5382   */
5383  function wp_unique_post_slug( $slug, $post_id, $post_status, $post_type, $post_parent ) {
5384      if ( in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ), true )
5385          || ( 'inherit' === $post_status && 'revision' === $post_type ) || 'user_request' === $post_type
5386      ) {
5387          return $slug;
5388      }
5389  
5390      /**
5391       * Filters the post slug before it is generated to be unique.
5392       *
5393       * Returning a non-null value will short-circuit the
5394       * unique slug generation, returning the passed value instead.
5395       *
5396       * @since 5.1.0
5397       *
5398       * @param string|null $override_slug Short-circuit return value.
5399       * @param string      $slug          The desired slug (post_name).
5400       * @param int         $post_id       Post ID.
5401       * @param string      $post_status   The post status.
5402       * @param string      $post_type     Post type.
5403       * @param int         $post_parent   Post parent ID.
5404       */
5405      $override_slug = apply_filters( 'pre_wp_unique_post_slug', null, $slug, $post_id, $post_status, $post_type, $post_parent );
5406      if ( null !== $override_slug ) {
5407          return $override_slug;
5408      }
5409  
5410      global $wpdb, $wp_rewrite;
5411  
5412      $original_slug = $slug;
5413  
5414      $feeds = $wp_rewrite->feeds;
5415      if ( ! is_array( $feeds ) ) {
5416          $feeds = array();
5417      }
5418  
5419      if ( 'attachment' === $post_type ) {
5420          // Attachment slugs must be unique across all types.
5421          $check_sql       = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1";
5422          $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_id ) );
5423  
5424          /**
5425           * Filters whether the post slug would make a bad attachment slug.
5426           *
5427           * @since 3.1.0
5428           *
5429           * @param bool   $bad_slug Whether the slug would be bad as an attachment slug.
5430           * @param string $slug     The post slug.
5431           */
5432          $is_bad_attachment_slug = apply_filters( 'wp_unique_post_slug_is_bad_attachment_slug', false, $slug );
5433  
5434          if ( $post_name_check
5435              || in_array( $slug, $feeds, true ) || 'embed' === $slug
5436              || $is_bad_attachment_slug
5437          ) {
5438              $suffix = 2;
5439              do {
5440                  $alt_post_name   = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
5441                  $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_id ) );
5442                  ++$suffix;
5443              } while ( $post_name_check );
5444              $slug = $alt_post_name;
5445          }
5446      } elseif ( is_post_type_hierarchical( $post_type ) ) {
5447          if ( 'nav_menu_item' === $post_type ) {
5448              return $slug;
5449          }
5450  
5451          /*
5452           * Page slugs must be unique within their own trees. Pages are in a separate
5453           * namespace than posts so page slugs are allowed to overlap post slugs.
5454           */
5455          $check_sql       = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type IN ( %s, 'attachment' ) AND ID != %d AND post_parent = %d LIMIT 1";
5456          $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_type, $post_id, $post_parent ) );
5457  
5458          /**
5459           * Filters whether the post slug would make a bad hierarchical post slug.
5460           *
5461           * @since 3.1.0
5462           *
5463           * @param bool   $bad_slug    Whether the post slug would be bad in a hierarchical post context.
5464           * @param string $slug        The post slug.
5465           * @param string $post_type   Post type.
5466           * @param int    $post_parent Post parent ID.
5467           */
5468          $is_bad_hierarchical_slug = apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent );
5469  
5470          if ( $post_name_check
5471              || in_array( $slug, $feeds, true ) || 'embed' === $slug
5472              || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug )
5473              || $is_bad_hierarchical_slug
5474          ) {
5475              $suffix = 2;
5476              do {
5477                  $alt_post_name   = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
5478                  $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_type, $post_id, $post_parent ) );
5479                  ++$suffix;
5480              } while ( $post_name_check );
5481              $slug = $alt_post_name;
5482          }
5483      } else {
5484          // Post slugs must be unique across all posts.
5485          $check_sql       = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type = %s AND ID != %d LIMIT 1";
5486          $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_type, $post_id ) );
5487  
5488          $post = get_post( $post_id );
5489  
5490          // Prevent new post slugs that could result in URLs that conflict with date archives.
5491          $conflicts_with_date_archive = false;
5492          if ( 'post' === $post_type && ( ! $post || $post->post_name !== $slug ) && preg_match( '/^[0-9]+$/', $slug ) ) {
5493              $slug_num = (int) $slug;
5494  
5495              if ( $slug_num ) {
5496                  $permastructs   = array_values( array_filter( explode( '/', get_option( 'permalink_structure' ) ) ) );
5497                  $postname_index = array_search( '%postname%', $permastructs, true );
5498  
5499                  /*
5500                  * Potential date clashes are as follows:
5501                  *
5502                  * - Any integer in the first permastruct position could be a year.
5503                  * - An integer between 1 and 12 that follows 'year' conflicts with 'monthnum'.
5504                  * - An integer between 1 and 31 that follows 'monthnum' conflicts with 'day'.
5505                  */
5506                  if ( 0 === $postname_index ||
5507                      ( $postname_index && '%year%' === $permastructs[ $postname_index - 1 ] && 13 > $slug_num ) ||
5508                      ( $postname_index && '%monthnum%' === $permastructs[ $postname_index - 1 ] && 32 > $slug_num )
5509                  ) {
5510                      $conflicts_with_date_archive = true;
5511                  }
5512              }
5513          }
5514  
5515          /**
5516           * Filters whether the post slug would be bad as a flat slug.
5517           *
5518           * @since 3.1.0
5519           *
5520           * @param bool   $bad_slug  Whether the post slug would be bad as a flat slug.
5521           * @param string $slug      The post slug.
5522           * @param string $post_type Post type.
5523           */
5524          $is_bad_flat_slug = apply_filters( 'wp_unique_post_slug_is_bad_flat_slug', false, $slug, $post_type );
5525  
5526          if ( $post_name_check
5527              || in_array( $slug, $feeds, true ) || 'embed' === $slug
5528              || $conflicts_with_date_archive
5529              || $is_bad_flat_slug
5530          ) {
5531              $suffix = 2;
5532              do {
5533                  $alt_post_name   = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
5534                  $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_type, $post_id ) );
5535                  ++$suffix;
5536              } while ( $post_name_check );
5537              $slug = $alt_post_name;
5538          }
5539      }
5540  
5541      /**
5542       * Filters the unique post slug.
5543       *
5544       * @since 3.3.0
5545       *
5546       * @param string $slug          The post slug.
5547       * @param int    $post_id       Post ID.
5548       * @param string $post_status   The post status.
5549       * @param string $post_type     Post type.
5550       * @param int    $post_parent   Post parent ID
5551       * @param string $original_slug The original post slug.
5552       */
5553      return apply_filters( 'wp_unique_post_slug', $slug, $post_id, $post_status, $post_type, $post_parent, $original_slug );
5554  }
5555  
5556  /**
5557   * Truncates a post slug.
5558   *
5559   * @since 3.6.0
5560   * @access private
5561   *
5562   * @see utf8_uri_encode()
5563   *
5564   * @param string $slug   The slug to truncate.
5565   * @param int    $length Optional. Max length of the slug. Default 200 (characters).
5566   * @return string The truncated slug.
5567   */
5568  function _truncate_post_slug( $slug, $length = 200 ) {
5569      if ( strlen( $slug ) > $length ) {
5570          $decoded_slug = urldecode( $slug );
5571          if ( $decoded_slug === $slug ) {
5572              $slug = substr( $slug, 0, $length );
5573          } else {
5574              $slug = utf8_uri_encode( $decoded_slug, $length, true );
5575          }
5576      }
5577  
5578      return rtrim( $slug, '-' );
5579  }
5580  
5581  /**
5582   * Adds tags to a post.
5583   *
5584   * @see wp_set_post_tags()
5585   *
5586   * @since 2.3.0
5587   *
5588   * @param int          $post_id Optional. The Post ID. Does not default to the ID of the global $post.
5589   * @param string|array $tags    Optional. An array of tags to set for the post, or a string of tags
5590   *                              separated by commas. Default empty.
5591   * @return array|false|WP_Error Array of affected term IDs. WP_Error or false on failure.
5592   */
5593  function wp_add_post_tags( $post_id = 0, $tags = '' ) {
5594      return wp_set_post_tags( $post_id, $tags, true );
5595  }
5596  
5597  /**
5598   * Sets the tags for a post.
5599   *
5600   * @since 2.3.0
5601   *
5602   * @see wp_set_object_terms()
5603   *
5604   * @param int          $post_id Optional. The Post ID. Does not default to the ID of the global $post.
5605   * @param string|array $tags    Optional. An array of tags to set for the post, or a string of tags
5606   *                              separated by commas. Default empty.
5607   * @param bool         $append  Optional. If true, don't delete existing tags, just add on. If false,
5608   *                              replace the tags with the new tags. Default false.
5609   * @return array|false|WP_Error Array of term taxonomy IDs of affected terms. WP_Error or false on failure.
5610   */
5611  function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
5612      return wp_set_post_terms( $post_id, $tags, 'post_tag', $append );
5613  }
5614  
5615  /**
5616   * Sets the terms for a post.
5617   *
5618   * @since 2.8.0
5619   *
5620   * @see wp_set_object_terms()
5621   *
5622   * @param int          $post_id  Optional. The Post ID. Does not default to the ID of the global $post.
5623   * @param string|array $terms    Optional. An array of terms to set for the post, or a string of terms
5624   *                               separated by commas. Hierarchical taxonomies must always pass IDs rather
5625   *                               than names so that children with the same names but different parents
5626   *                               aren't confused. Default empty.
5627   * @param string       $taxonomy Optional. Taxonomy name. Default 'post_tag'.
5628   * @param bool         $append   Optional. If true, don't delete existing terms, just add on. If false,
5629   *                               replace the terms with the new terms. Default false.
5630   * @return array|false|WP_Error Array of term taxonomy IDs of affected terms. WP_Error or false on failure.
5631   */
5632  function wp_set_post_terms( $post_id = 0, $terms = '', $taxonomy = 'post_tag', $append = false ) {
5633      $post_id = (int) $post_id;
5634  
5635      if ( ! $post_id ) {
5636          return false;
5637      }
5638  
5639      if ( empty( $terms ) ) {
5640          $terms = array();
5641      }
5642  
5643      if ( ! is_array( $terms ) ) {
5644          $comma = _x( ',', 'tag delimiter' );
5645          if ( ',' !== $comma ) {
5646              $terms = str_replace( $comma, ',', $terms );
5647          }
5648          $terms = explode( ',', trim( $terms, " \n\t\r\0\x0B," ) );
5649      }
5650  
5651      /*
5652       * Hierarchical taxonomies must always pass IDs rather than names so that
5653       * children with the same names but different parents aren't confused.
5654       */
5655      if ( is_taxonomy_hierarchical( $taxonomy ) ) {
5656          $terms = array_unique( array_map( 'intval', $terms ) );
5657      }
5658  
5659      return wp_set_object_terms( $post_id, $terms, $taxonomy, $append );
5660  }
5661  
5662  /**
5663   * Sets categories for a post.
5664   *
5665   * If no categories are provided, the default category is used.
5666   *
5667   * @since 2.1.0
5668   *
5669   * @param int       $post_id         Optional. The Post ID. Does not default to the ID
5670   *                                   of the global $post. Default 0.
5671   * @param int[]|int $post_categories Optional. List of category IDs, or the ID of a single category.
5672   *                                   Default empty array.
5673   * @param bool      $append          If true, don't delete existing categories, just add on.
5674   *                                   If false, replace the categories with the new categories.
5675   * @return array|false|WP_Error Array of term taxonomy IDs of affected categories. WP_Error or false on failure.
5676   */
5677  function wp_set_post_categories( $post_id = 0, $post_categories = array(), $append = false ) {
5678      $post_id     = (int) $post_id;
5679      $post_type   = get_post_type( $post_id );
5680      $post_status = get_post_status( $post_id );
5681  
5682      // If $post_categories isn't already an array, make it one.
5683      $post_categories = (array) $post_categories;
5684  
5685      if ( empty( $post_categories ) ) {
5686          /**
5687           * Filters post types (in addition to 'post') that require a default category.
5688           *
5689           * @since 5.5.0
5690           *
5691           * @param string[] $post_types An array of post type names. Default empty array.
5692           */
5693          $default_category_post_types = apply_filters( 'default_category_post_types', array() );
5694  
5695          // Regular posts always require a default category.
5696          $default_category_post_types = array_merge( $default_category_post_types, array( 'post' ) );
5697  
5698          if ( in_array( $post_type, $default_category_post_types, true )
5699              && is_object_in_taxonomy( $post_type, 'category' )
5700              && 'auto-draft' !== $post_status
5701          ) {
5702              $post_categories = array( get_option( 'default_category' ) );
5703              $append          = false;
5704          } else {
5705              $post_categories = array();
5706          }
5707      } elseif ( 1 === count( $post_categories ) && '' === reset( $post_categories ) ) {
5708          return true;
5709      }
5710  
5711      return wp_set_post_terms( $post_id, $post_categories, 'category', $append );
5712  }
5713  
5714  /**
5715   * Fires actions related to the transitioning of a post's status.
5716   *
5717   * When a post is saved, the post status is "transitioned" from one status to another,
5718   * though this does not always mean the status has actually changed before and after
5719   * the save. This function fires a number of action hooks related to that transition:
5720   * the generic {@see 'transition_post_status'} action, as well as the dynamic hooks
5721   * {@see '$old_status_to_$new_status'} and {@see '$new_status_$post->post_type'}. Note
5722   * that the function does not transition the post object in the database.
5723   *
5724   * For instance: When publishing a post for the first time, the post status may transition
5725   * from 'draft' – or some other status – to 'publish'. However, if a post is already
5726   * published and is simply being updated, the "old" and "new" statuses may both be 'publish'
5727   * before and after the transition.
5728   *
5729   * @since 2.3.0
5730   *
5731   * @param string  $new_status Transition to this post status.
5732   * @param string  $old_status Previous post status.
5733   * @param WP_Post $post Post data.
5734   */
5735  function wp_transition_post_status( $new_status, $old_status, $post ) {
5736      /**
5737       * Fires when a post is transitioned from one status to another.
5738       *
5739       * @since 2.3.0
5740       *
5741       * @param string  $new_status New post status.
5742       * @param string  $old_status Old post status.
5743       * @param WP_Post $post       Post object.
5744       */
5745      do_action( 'transition_post_status', $new_status, $old_status, $post );
5746  
5747      /**
5748       * Fires when a post is transitioned from one status to another.
5749       *
5750       * The dynamic portions of the hook name, `$new_status` and `$old_status`,
5751       * refer to the old and new post statuses, respectively.
5752       *
5753       * Possible hook names include:
5754       *
5755       *  - `draft_to_publish`
5756       *  - `publish_to_trash`
5757       *  - `pending_to_draft`
5758       *
5759       * @since 2.3.0
5760       *
5761       * @param WP_Post $post Post object.
5762       */
5763      do_action( "{$old_status}_to_{$new_status}", $post );
5764  
5765      /**
5766       * Fires when a post is transitioned from one status to another.
5767       *
5768       * The dynamic portions of the hook name, `$new_status` and `$post->post_type`,
5769       * refer to the new post status and post type, respectively.
5770       *
5771       * Possible hook names include:
5772       *
5773       *  - `draft_post`
5774       *  - `future_post`
5775       *  - `pending_post`
5776       *  - `private_post`
5777       *  - `publish_post`
5778       *  - `trash_post`
5779       *  - `draft_page`
5780       *  - `future_page`
5781       *  - `pending_page`
5782       *  - `private_page`
5783       *  - `publish_page`
5784       *  - `trash_page`
5785       *  - `publish_attachment`
5786       *  - `trash_attachment`
5787       *
5788       * Please note: When this action is hooked using a particular post status (like
5789       * 'publish', as `publish_{$post->post_type}`), it will fire both when a post is
5790       * first transitioned to that status from something else, as well as upon
5791       * subsequent post updates (old and new status are both the same).
5792       *
5793       * Therefore, if you are looking to only fire a callback when a post is first
5794       * transitioned to a status, use the {@see 'transition_post_status'} hook instead.
5795       *
5796       * @since 2.3.0
5797       * @since 5.9.0 Added `$old_status` parameter.
5798       *
5799       * @param int     $post_id    Post ID.
5800       * @param WP_Post $post       Post object.
5801       * @param string  $old_status Old post status.
5802       */
5803      do_action( "{$new_status}_{$post->post_type}", $post->ID, $post, $old_status );
5804  }
5805  
5806  /**
5807   * Fires actions after a post, its terms and meta data has been saved.
5808   *
5809   * @since 5.6.0
5810   *
5811   * @param int|WP_Post  $post        The post ID or object that has been saved.
5812   * @param bool         $update      Whether this is an existing post being updated.
5813   * @param null|WP_Post $post_before Null for new posts, the WP_Post object prior
5814   *                                  to the update for updated posts.
5815   */
5816  function wp_after_insert_post( $post, $update, $post_before ) {
5817      $post = get_post( $post );
5818  
5819      if ( ! $post ) {
5820          return;
5821      }
5822  
5823      $post_id = $post->ID;
5824  
5825      /**
5826       * Fires once a post, its terms and meta data has been saved.
5827       *
5828       * @since 5.6.0
5829       *
5830       * @param int          $post_id     Post ID.
5831       * @param WP_Post      $post        Post object.
5832       * @param bool         $update      Whether this is an existing post being updated.
5833       * @param null|WP_Post $post_before Null for new posts, the WP_Post object prior
5834       *                                  to the update for updated posts.
5835       */
5836      do_action( 'wp_after_insert_post', $post_id, $post, $update, $post_before );
5837  }
5838  
5839  //
5840  // Comment, trackback, and pingback functions.
5841  //
5842  
5843  /**
5844   * Adds a URL to those already pinged.
5845   *
5846   * @since 1.5.0
5847   * @since 4.7.0 `$post` can be a WP_Post object.
5848   * @since 4.7.0 `$uri` can be an array of URIs.
5849   *
5850   * @global wpdb $wpdb WordPress database abstraction object.
5851   *
5852   * @param int|WP_Post  $post Post ID or post object.
5853   * @param string|array $uri  Ping URI or array of URIs.
5854   * @return int|false How many rows were updated.
5855   */
5856  function add_ping( $post, $uri ) {
5857      global $wpdb;
5858  
5859      $post = get_post( $post );
5860  
5861      if ( ! $post ) {
5862          return false;
5863      }
5864  
5865      $pung = trim( $post->pinged );
5866      $pung = preg_split( '/\s/', $pung );
5867  
5868      if ( is_array( $uri ) ) {
5869          $pung = array_merge( $pung, $uri );
5870      } else {
5871          $pung[] = $uri;
5872      }
5873      $new = implode( "\n", $pung );
5874  
5875      /**
5876       * Filters the new ping URL to add for the given post.
5877       *
5878       * @since 2.0.0
5879       *
5880       * @param string $new New ping URL to add.
5881       */
5882      $new = apply_filters( 'add_ping', $new );
5883  
5884      $return = $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post->ID ) );
5885      clean_post_cache( $post->ID );
5886      return $return;
5887  }
5888  
5889  /**
5890   * Retrieves enclosures already enclosed for a post.
5891   *
5892   * @since 1.5.0
5893   *
5894   * @param int $post_id Post ID.
5895   * @return string[] Array of enclosures for the given post.
5896   */
5897  function get_enclosed( $post_id ) {
5898      $custom_fields = get_post_custom( $post_id );
5899      $pung          = array();
5900      if ( ! is_array( $custom_fields ) ) {
5901          return $pung;
5902      }
5903  
5904      foreach ( $custom_fields as $key => $val ) {
5905          if ( 'enclosure' !== $key || ! is_array( $val ) ) {
5906              continue;
5907          }
5908          foreach ( $val as $enc ) {
5909              $enclosure = explode( "\n", $enc );
5910              $pung[]    = trim( $enclosure[0] );
5911          }
5912      }
5913  
5914      /**
5915       * Filters the list of enclosures already enclosed for the given post.
5916       *
5917       * @since 2.0.0
5918       *
5919       * @param string[] $pung    Array of enclosures for the given post.
5920       * @param int      $post_id Post ID.
5921       */
5922      return apply_filters( 'get_enclosed', $pung, $post_id );
5923  }
5924  
5925  /**
5926   * Retrieves URLs already pinged for a post.
5927   *
5928   * @since 1.5.0
5929   *
5930   * @since 4.7.0 `$post` can be a WP_Post object.
5931   *
5932   * @param int|WP_Post $post Post ID or object.
5933   * @return string[]|false Array of URLs already pinged for the given post, false if the post is not found.
5934   */
5935  function get_pung( $post ) {
5936      $post = get_post( $post );
5937  
5938      if ( ! $post ) {
5939          return false;
5940      }
5941  
5942      $pung = trim( $post->pinged );
5943      $pung = preg_split( '/\s/', $pung );
5944  
5945      /**
5946       * Filters the list of already-pinged URLs for the given post.
5947       *
5948       * @since 2.0.0
5949       *
5950       * @param string[] $pung Array of URLs already pinged for the given post.
5951       */
5952      return apply_filters( 'get_pung', $pung );
5953  }
5954  
5955  /**
5956   * Retrieves URLs that need to be pinged.
5957   *
5958   * @since 1.5.0
5959   * @since 4.7.0 `$post` can be a WP_Post object.
5960   *
5961   * @param int|WP_Post $post Post ID or post object.
5962   * @return string[]|false List of URLs yet to ping.
5963   */
5964  function get_to_ping( $post ) {
5965      $post = get_post( $post );
5966  
5967      if ( ! $post ) {
5968          return false;
5969      }
5970  
5971      $to_ping = sanitize_trackback_urls( $post->to_ping );
5972      $to_ping = preg_split( '/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY );
5973  
5974      /**
5975       * Filters the list of URLs yet to ping for the given post.
5976       *
5977       * @since 2.0.0
5978       *
5979       * @param string[] $to_ping List of URLs yet to ping.
5980       */
5981      return apply_filters( 'get_to_ping', $to_ping );
5982  }
5983  
5984  /**
5985   * Does trackbacks for a list of URLs.
5986   *
5987   * @since 1.0.0
5988   *
5989   * @param string $tb_list Comma separated list of URLs.
5990   * @param int    $post_id Post ID.
5991   */
5992  function trackback_url_list( $tb_list, $post_id ) {
5993      if ( ! empty( $tb_list ) ) {
5994          // Get post data.
5995          $postdata = get_post( $post_id, ARRAY_A );
5996  
5997          // Form an excerpt.
5998          $excerpt = strip_tags( $postdata['post_excerpt'] ? $postdata['post_excerpt'] : $postdata['post_content'] );
5999  
6000          if ( strlen( $excerpt ) > 255 ) {
6001              $excerpt = substr( $excerpt, 0, 252 ) . '&hellip;';
6002          }
6003  
6004          $trackback_urls = explode( ',', $tb_list );
6005          foreach ( (array) $trackback_urls as $tb_url ) {
6006              $tb_url = trim( $tb_url );
6007              trackback( $tb_url, wp_unslash( $postdata['post_title'] ), $excerpt, $post_id );
6008          }
6009      }
6010  }
6011  
6012  //
6013  // Page functions.
6014  //
6015  
6016  /**
6017   * Gets a list of page IDs.
6018   *
6019   * @since 2.0.0
6020   *
6021   * @global wpdb $wpdb WordPress database abstraction object.
6022   *
6023   * @return string[] List of page IDs as strings.
6024   */
6025  function get_all_page_ids() {
6026      global $wpdb;
6027  
6028      $page_ids = wp_cache_get( 'all_page_ids', 'posts' );
6029      if ( ! is_array( $page_ids ) ) {
6030          $page_ids = $wpdb->get_col( "SELECT ID FROM $wpdb->posts WHERE post_type = 'page'" );
6031          wp_cache_add( 'all_page_ids', $page_ids, 'posts' );
6032      }
6033  
6034      return $page_ids;
6035  }
6036  
6037  /**
6038   * Retrieves page data given a page ID or page object.
6039   *
6040   * Use get_post() instead of get_page().
6041   *
6042   * @since 1.5.1
6043   * @deprecated 3.5.0 Use get_post()
6044   *
6045   * @param int|WP_Post $page   Page object or page ID. Passed by reference.
6046   * @param string      $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
6047   *                            correspond to a WP_Post object, an associative array, or a numeric array,
6048   *                            respectively. Default OBJECT.
6049   * @param string      $filter Optional. How the return value should be filtered. Accepts 'raw',
6050   *                            'edit', 'db', 'display'. Default 'raw'.
6051   * @return WP_Post|array|null WP_Post or array on success, null on failure.
6052   */
6053  function get_page( $page, $output = OBJECT, $filter = 'raw' ) {
6054      return get_post( $page, $output, $filter );
6055  }
6056  
6057  /**
6058   * Retrieves a page given its path.
6059   *
6060   * @since 2.1.0
6061   *
6062   * @global wpdb $wpdb WordPress database abstraction object.
6063   *
6064   * @param string       $page_path Page path.
6065   * @param string       $output    Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
6066   *                                correspond to a WP_Post object, an associative array, or a numeric array,
6067   *                                respectively. Default OBJECT.
6068   * @param string|array $post_type Optional. Post type or array of post types. Default 'page'.
6069   * @return WP_Post|array|null WP_Post (or array) on success, or null on failure.
6070   */
6071  function get_page_by_path( $page_path, $output = OBJECT, $post_type = 'page' ) {
6072      global $wpdb;
6073  
6074      $last_changed = wp_cache_get_last_changed( 'posts' );
6075  
6076      $hash      = md5( $page_path . serialize( $post_type ) );
6077      $cache_key = "get_page_by_path:$hash:$last_changed";
6078      $cached    = wp_cache_get( $cache_key, 'post-queries' );
6079      if ( false !== $cached ) {
6080          // Special case: '0' is a bad `$page_path`.
6081          if ( '0' === $cached || 0 === $cached ) {
6082              return;
6083          } else {
6084              return get_post( $cached, $output );
6085          }
6086      }
6087  
6088      $page_path     = rawurlencode( urldecode( $page_path ) );
6089      $page_path     = str_replace( '%2F', '/', $page_path );
6090      $page_path     = str_replace( '%20', ' ', $page_path );
6091      $parts         = explode( '/', trim( $page_path, '/' ) );
6092      $parts         = array_map( 'sanitize_title_for_query', $parts );
6093      $escaped_parts = esc_sql( $parts );
6094  
6095      $in_string = "'" . implode( "','", $escaped_parts ) . "'";
6096  
6097      if ( is_array( $post_type ) ) {
6098          $post_types = $post_type;
6099      } else {
6100          $post_types = array( $post_type, 'attachment' );
6101      }
6102  
6103      $post_types          = esc_sql( $post_types );
6104      $post_type_in_string = "'" . implode( "','", $post_types ) . "'";
6105      $sql                 = "
6106          SELECT ID, post_name, post_parent, post_type
6107          FROM $wpdb->posts
6108          WHERE post_name IN ($in_string)
6109          AND post_type IN ($post_type_in_string)
6110      ";
6111  
6112      $pages = $wpdb->get_results( $sql, OBJECT_K );
6113  
6114      $revparts = array_reverse( $parts );
6115  
6116      $found_id = 0;
6117      foreach ( (array) $pages as $page ) {
6118          if ( $page->post_name === $revparts[0] ) {
6119              $count = 0;
6120              $p     = $page;
6121  
6122              /*
6123               * Loop through the given path parts from right to left,
6124               * ensuring each matches the post ancestry.
6125               */
6126              while ( 0 !== (int) $p->post_parent && isset( $pages[ $p->post_parent ] ) ) {
6127                  ++$count;
6128                  $parent = $pages[ $p->post_parent ];
6129                  if ( ! isset( $revparts[ $count ] ) || $parent->post_name !== $revparts[ $count ] ) {
6130                      break;
6131                  }
6132                  $p = $parent;
6133              }
6134  
6135              if ( 0 === (int) $p->post_parent
6136                  && count( $revparts ) === $count + 1
6137                  && $p->post_name === $revparts[ $count ]
6138              ) {
6139                  $found_id = $page->ID;
6140                  if ( $page->post_type === $post_type ) {
6141                      break;
6142                  }
6143              }
6144          }
6145      }
6146  
6147      // We cache misses as well as hits.
6148      wp_cache_set( $cache_key, $found_id, 'post-queries' );
6149  
6150      if ( $found_id ) {
6151          return get_post( $found_id, $output );
6152      }
6153  
6154      return null;
6155  }
6156  
6157  /**
6158   * Identifies descendants of a given page ID in a list of page objects.
6159   *
6160   * Descendants are identified from the `$pages` array passed to the function. No database queries are performed.
6161   *
6162   * @since 1.5.1
6163   *
6164   * @param int       $page_id Page ID.
6165   * @param WP_Post[] $pages   List of page objects from which descendants should be identified.
6166   * @return WP_Post[] List of page children.
6167   */
6168  function get_page_children( $page_id, $pages ) {
6169      // Build a hash of ID -> children.
6170      $children = array();
6171      foreach ( (array) $pages as $page ) {
6172          $children[ (int) $page->post_parent ][] = $page;
6173      }
6174  
6175      $page_list = array();
6176  
6177      // Start the search by looking at immediate children.
6178      if ( isset( $children[ $page_id ] ) ) {
6179          // Always start at the end of the stack in order to preserve original `$pages` order.
6180          $to_look = array_reverse( $children[ $page_id ] );
6181  
6182          while ( $to_look ) {
6183              $p           = array_pop( $to_look );
6184              $page_list[] = $p;
6185              if ( isset( $children[ $p->ID ] ) ) {
6186                  foreach ( array_reverse( $children[ $p->ID ] ) as $child ) {
6187                      // Append to the `$to_look` stack to descend the tree.
6188                      $to_look[] = $child;
6189                  }
6190              }
6191          }
6192      }
6193  
6194      return $page_list;
6195  }
6196  
6197  /**
6198   * Orders the pages with children under parents in a flat list.
6199   *
6200   * It uses auxiliary structure to hold parent-children relationships and
6201   * runs in O(N) complexity
6202   *
6203   * @since 2.0.0
6204   *
6205   * @param WP_Post[] $pages   Posts array (passed by reference).
6206   * @param int       $page_id Optional. Parent page ID. Default 0.
6207   * @return string[] Array of post names keyed by ID and arranged by hierarchy. Children immediately follow their parents.
6208   */
6209  function get_page_hierarchy( &$pages, $page_id = 0 ) {
6210      if ( empty( $pages ) ) {
6211          return array();
6212      }
6213  
6214      $children = array();
6215      foreach ( (array) $pages as $p ) {
6216          $parent_id                = (int) $p->post_parent;
6217          $children[ $parent_id ][] = $p;
6218      }
6219  
6220      $result = array();
6221      _page_traverse_name( $page_id, $children, $result );
6222  
6223      return $result;
6224  }
6225  
6226  /**
6227   * Traverses and return all the nested children post names of a root page.
6228   *
6229   * $children contains parent-children relations
6230   *
6231   * @since 2.9.0
6232   * @access private
6233   *
6234   * @see _page_traverse_name()
6235   *
6236   * @param int      $page_id  Page ID.
6237   * @param array    $children Parent-children relations (passed by reference).
6238   * @param string[] $result   Array of page names keyed by ID (passed by reference).
6239   */
6240  function _page_traverse_name( $page_id, &$children, &$result ) {
6241      if ( isset( $children[ $page_id ] ) ) {
6242          foreach ( (array) $children[ $page_id ] as $child ) {
6243              $result[ $child->ID ] = $child->post_name;
6244              _page_traverse_name( $child->ID, $children, $result );
6245          }
6246      }
6247  }
6248  
6249  /**
6250   * Builds the URI path for a page.
6251   *
6252   * Sub pages will be in the "directory" under the parent page post name.
6253   *
6254   * @since 1.5.0
6255   * @since 4.6.0 The `$page` parameter was made optional.
6256   *
6257   * @param WP_Post|object|int $page Optional. Page ID or WP_Post object. Default is global $post.
6258   * @return string|false Page URI, false on error.
6259   */
6260  function get_page_uri( $page = 0 ) {
6261      if ( ! $page instanceof WP_Post ) {
6262          $page = get_post( $page );
6263      }
6264  
6265      if ( ! $page ) {
6266          return false;
6267      }
6268  
6269      $uri = $page->post_name;
6270  
6271      foreach ( $page->ancestors as $parent ) {
6272          $parent = get_post( $parent );
6273          if ( $parent && $parent->post_name ) {
6274              $uri = $parent->post_name . '/' . $uri;
6275          }
6276      }
6277  
6278      /**
6279       * Filters the URI for a page.
6280       *
6281       * @since 4.4.0
6282       *
6283       * @param string  $uri  Page URI.
6284       * @param WP_Post $page Page object.
6285       */
6286      return apply_filters( 'get_page_uri', $uri, $page );
6287  }
6288  
6289  /**
6290   * Retrieves an array of pages (or hierarchical post type items).
6291   *
6292   * @since 1.5.0
6293   * @since 6.3.0 Use WP_Query internally.
6294   *
6295   * @param array|string $args {
6296   *     Optional. Array or string of arguments to retrieve pages.
6297   *
6298   *     @type int          $child_of     Page ID to return child and grandchild pages of. Note: The value
6299   *                                      of `$hierarchical` has no bearing on whether `$child_of` returns
6300   *                                      hierarchical results. Default 0, or no restriction.
6301   *     @type string       $sort_order   How to sort retrieved pages. Accepts 'ASC', 'DESC'. Default 'ASC'.
6302   *     @type string       $sort_column  What columns to sort pages by, comma-separated. Accepts 'post_author',
6303   *                                      'post_date', 'post_title', 'post_name', 'post_modified', 'menu_order',
6304   *                                      'post_modified_gmt', 'post_parent', 'ID', 'rand', 'comment_count'.
6305   *                                      'post_' can be omitted for any values that start with it.
6306   *                                      Default 'post_title'.
6307   *     @type bool         $hierarchical Whether to return pages hierarchically. If false in conjunction with
6308   *                                      `$child_of` also being false, both arguments will be disregarded.
6309   *                                      Default true.
6310   *     @type int[]        $exclude      Array of page IDs to exclude. Default empty array.
6311   *     @type int[]        $include      Array of page IDs to include. Cannot be used with `$child_of`,
6312   *                                      `$parent`, `$exclude`, `$meta_key`, `$meta_value`, or `$hierarchical`.
6313   *                                      Default empty array.
6314   *     @type string       $meta_key     Only include pages with this meta key. Default empty.
6315   *     @type string       $meta_value   Only include pages with this meta value. Requires `$meta_key`.
6316   *                                      Default empty.
6317   *     @type string       $authors      A comma-separated list of author IDs. Default empty.
6318   *     @type int          $parent       Page ID to return direct children of. Default -1, or no restriction.
6319   *     @type string|int[] $exclude_tree Comma-separated string or array of page IDs to exclude.
6320   *                                      Default empty array.
6321   *     @type int          $number       The number of pages to return. Default 0, or all pages.
6322   *     @type int          $offset       The number of pages to skip before returning. Requires `$number`.
6323   *                                      Default 0.
6324   *     @type string       $post_type    The post type to query. Default 'page'.
6325   *     @type string|array $post_status  A comma-separated list or array of post statuses to include.
6326   *                                      Default 'publish'.
6327   * }
6328   * @return WP_Post[]|false Array of pages (or hierarchical post type items). Boolean false if the
6329   *                         specified post type is not hierarchical or the specified status is not
6330   *                         supported by the post type.
6331   */
6332  function get_pages( $args = array() ) {
6333      $defaults = array(
6334          'child_of'     => 0,
6335          'sort_order'   => 'ASC',
6336          'sort_column'  => 'post_title',
6337          'hierarchical' => 1,
6338          'exclude'      => array(),
6339          'include'      => array(),
6340          'meta_key'     => '',
6341          'meta_value'   => '',
6342          'authors'      => '',
6343          'parent'       => -1,
6344          'exclude_tree' => array(),
6345          'number'       => '',
6346          'offset'       => 0,
6347          'post_type'    => 'page',
6348          'post_status'  => 'publish',
6349      );
6350  
6351      $parsed_args = wp_parse_args( $args, $defaults );
6352  
6353      $number       = (int) $parsed_args['number'];
6354      $offset       = (int) $parsed_args['offset'];
6355      $child_of     = (int) $parsed_args['child_of'];
6356      $hierarchical = $parsed_args['hierarchical'];
6357      $exclude      = $parsed_args['exclude'];
6358      $meta_key     = $parsed_args['meta_key'];
6359      $meta_value   = $parsed_args['meta_value'];
6360      $parent       = $parsed_args['parent'];
6361      $post_status  = $parsed_args['post_status'];
6362  
6363      // Make sure the post type is hierarchical.
6364      $hierarchical_post_types = get_post_types( array( 'hierarchical' => true ) );
6365      if ( ! in_array( $parsed_args['post_type'], $hierarchical_post_types, true ) ) {
6366          return false;
6367      }
6368  
6369      if ( $parent > 0 && ! $child_of ) {
6370          $hierarchical = false;
6371      }
6372  
6373      // Make sure we have a valid post status.
6374      if ( ! is_array( $post_status ) ) {
6375          $post_status = explode( ',', $post_status );
6376      }
6377      if ( array_diff( $post_status, get_post_stati() ) ) {
6378          return false;
6379      }
6380  
6381      $query_args = array(
6382          'orderby'                => 'post_title',
6383          'order'                  => 'ASC',
6384          'post__not_in'           => wp_parse_id_list( $exclude ),
6385          'meta_key'               => $meta_key,
6386          'meta_value'             => $meta_value,
6387          'posts_per_page'         => -1,
6388          'offset'                 => $offset,
6389          'post_type'              => $parsed_args['post_type'],
6390          'post_status'            => $post_status,
6391          'update_post_term_cache' => false,
6392          'update_post_meta_cache' => false,
6393          'ignore_sticky_posts'    => true,
6394          'no_found_rows'          => true,
6395      );
6396  
6397      if ( ! empty( $parsed_args['include'] ) ) {
6398          $child_of = 0; // Ignore child_of, parent, exclude, meta_key, and meta_value params if using include.
6399          $parent   = -1;
6400          unset( $query_args['post__not_in'], $query_args['meta_key'], $query_args['meta_value'] );
6401          $hierarchical           = false;
6402          $query_args['post__in'] = wp_parse_id_list( $parsed_args['include'] );
6403      }
6404  
6405      if ( ! empty( $parsed_args['authors'] ) ) {
6406          $post_authors = wp_parse_list( $parsed_args['authors'] );
6407  
6408          if ( ! empty( $post_authors ) ) {
6409              $query_args['author__in'] = array();
6410              foreach ( $post_authors as $post_author ) {
6411                  // Do we have an author id or an author login?
6412                  if ( 0 === (int) $post_author ) {
6413                      $post_author = get_user_by( 'login', $post_author );
6414                      if ( empty( $post_author ) ) {
6415                          continue;
6416                      }
6417                      if ( empty( $post_author->ID ) ) {
6418                          continue;
6419                      }
6420                      $post_author = $post_author->ID;
6421                  }
6422                  $query_args['author__in'][] = (int) $post_author;
6423              }
6424          }
6425      }
6426  
6427      if ( is_array( $parent ) ) {
6428          $post_parent__in = array_map( 'absint', (array) $parent );
6429          if ( ! empty( $post_parent__in ) ) {
6430              $query_args['post_parent__in'] = $post_parent__in;
6431          }
6432      } elseif ( $parent >= 0 ) {
6433          $query_args['post_parent'] = $parent;
6434      }
6435  
6436      /*
6437       * Maintain backward compatibility for `sort_column` key.
6438       * Additionally to `WP_Query`, it has been supporting the `post_modified_gmt` field, so this logic will translate
6439       * it to `post_modified` which should result in the same order given the two dates in the fields match.
6440       */
6441      $orderby = wp_parse_list( $parsed_args['sort_column'] );
6442      $orderby = array_map(
6443          static function ( $orderby_field ) {
6444              $orderby_field = trim( $orderby_field );
6445              if ( 'post_modified_gmt' === $orderby_field || 'modified_gmt' === $orderby_field ) {
6446                  $orderby_field = str_replace( '_gmt', '', $orderby_field );
6447              }
6448              return $orderby_field;
6449          },
6450          $orderby
6451      );
6452      if ( $orderby ) {
6453          $query_args['orderby'] = array_fill_keys( $orderby, $parsed_args['sort_order'] );
6454      }
6455  
6456      $order = $parsed_args['sort_order'];
6457      if ( $order ) {
6458          $query_args['order'] = $order;
6459      }
6460  
6461      if ( ! empty( $number ) ) {
6462          $query_args['posts_per_page'] = $number;
6463      }
6464  
6465      /**
6466       * Filters query arguments passed to WP_Query in get_pages.
6467       *
6468       * @since 6.3.0
6469       *
6470       * @param array $query_args  Array of arguments passed to WP_Query.
6471       * @param array $parsed_args Array of get_pages() arguments.
6472       */
6473      $query_args = apply_filters( 'get_pages_query_args', $query_args, $parsed_args );
6474  
6475      $pages = new WP_Query();
6476      $pages = $pages->query( $query_args );
6477  
6478      if ( $child_of || $hierarchical ) {
6479          $pages = get_page_children( $child_of, $pages );
6480      }
6481  
6482      if ( ! empty( $parsed_args['exclude_tree'] ) ) {
6483          $exclude = wp_parse_id_list( $parsed_args['exclude_tree'] );
6484          foreach ( $exclude as $id ) {
6485              $children = get_page_children( $id, $pages );
6486              foreach ( $children as $child ) {
6487                  $exclude[] = $child->ID;
6488              }
6489          }
6490  
6491          $num_pages = count( $pages );
6492          for ( $i = 0; $i < $num_pages; $i++ ) {
6493              if ( in_array( $pages[ $i ]->ID, $exclude, true ) ) {
6494                  unset( $pages[ $i ] );
6495              }
6496          }
6497      }
6498  
6499      /**
6500       * Filters the retrieved list of pages.
6501       *
6502       * @since 2.1.0
6503       *
6504       * @param WP_Post[] $pages       Array of page objects.
6505       * @param array     $parsed_args Array of get_pages() arguments.
6506       */
6507      return apply_filters( 'get_pages', $pages, $parsed_args );
6508  }
6509  
6510  //
6511  // Attachment functions.
6512  //
6513  
6514  /**
6515   * Determines whether an attachment URI is local and really an attachment.
6516   *
6517   * For more information on this and similar theme functions, check out
6518   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
6519   * Conditional Tags} article in the Theme Developer Handbook.
6520   *
6521   * @since 2.0.0
6522   *
6523   * @param string $url URL to check
6524   * @return bool True on success, false on failure.
6525   */
6526  function is_local_attachment( $url ) {
6527      if ( ! str_contains( $url, home_url() ) ) {
6528          return false;
6529      }
6530      if ( str_contains( $url, home_url( '/?attachment_id=' ) ) ) {
6531          return true;
6532      }
6533  
6534      $id = url_to_postid( $url );
6535      if ( $id ) {
6536          $post = get_post( $id );
6537          if ( 'attachment' === $post->post_type ) {
6538              return true;
6539          }
6540      }
6541      return false;
6542  }
6543  
6544  /**
6545   * Inserts an attachment.
6546   *
6547   * If you set the 'ID' in the $args parameter, it will mean that you are
6548   * updating and attempt to update the attachment. You can also set the
6549   * attachment name or title by setting the key 'post_name' or 'post_title'.
6550   *
6551   * You can set the dates for the attachment manually by setting the 'post_date'
6552   * and 'post_date_gmt' keys' values.
6553   *
6554   * By default, the comments will use the default settings for whether the
6555   * comments are allowed. You can close them manually or keep them open by
6556   * setting the value for the 'comment_status' key.
6557   *
6558   * @since 2.0.0
6559   * @since 4.7.0 Added the `$wp_error` parameter to allow a WP_Error to be returned on failure.
6560   * @since 5.6.0 Added the `$fire_after_hooks` parameter.
6561   *
6562   * @see wp_insert_post()
6563   *
6564   * @param string|array $args             Arguments for inserting an attachment.
6565   * @param string|false $file             Optional. Filename. Default false.
6566   * @param int          $parent_post_id   Optional. Parent post ID or 0 for no parent. Default 0.
6567   * @param bool         $wp_error         Optional. Whether to return a WP_Error on failure. Default false.
6568   * @param bool         $fire_after_hooks Optional. Whether to fire the after insert hooks. Default true.
6569   * @return int|WP_Error The attachment ID on success. The value 0 or WP_Error on failure.
6570   */
6571  function wp_insert_attachment( $args, $file = false, $parent_post_id = 0, $wp_error = false, $fire_after_hooks = true ) {
6572      $defaults = array(
6573          'file'        => $file,
6574          'post_parent' => 0,
6575      );
6576  
6577      $data = wp_parse_args( $args, $defaults );
6578  
6579      if ( ! empty( $parent_post_id ) ) {
6580          $data['post_parent'] = $parent_post_id;
6581      }
6582  
6583      $data['post_type'] = 'attachment';
6584  
6585      return wp_insert_post( $data, $wp_error, $fire_after_hooks );
6586  }
6587  
6588  /**
6589   * Trashes or deletes an attachment.
6590   *
6591   * When an attachment is permanently deleted, the file will also be removed.
6592   * Deletion removes all post meta fields, taxonomy, comments, etc. associated
6593   * with the attachment (except the main post).
6594   *
6595   * The attachment is moved to the Trash instead of permanently deleted unless Trash
6596   * for media is disabled, item is already in the Trash, or $force_delete is true.
6597   *
6598   * @since 2.0.0
6599   *
6600   * @global wpdb $wpdb WordPress database abstraction object.
6601   *
6602   * @param int  $post_id      Attachment ID.
6603   * @param bool $force_delete Optional. Whether to bypass Trash and force deletion.
6604   *                           Default false.
6605   * @return WP_Post|false|null Post data on success, false or null on failure.
6606   */
6607  function wp_delete_attachment( $post_id, $force_delete = false ) {
6608      global $wpdb;
6609  
6610      $post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id ) );
6611  
6612      if ( ! $post ) {
6613          return $post;
6614      }
6615  
6616      $post = get_post( $post );
6617  
6618      if ( 'attachment' !== $post->post_type ) {
6619          return false;
6620      }
6621  
6622      if ( ! $force_delete && EMPTY_TRASH_DAYS && MEDIA_TRASH && 'trash' !== $post->post_status ) {
6623          return wp_trash_post( $post_id );
6624      }
6625  
6626      /**
6627       * Filters whether an attachment deletion should take place.
6628       *
6629       * @since 5.5.0
6630       *
6631       * @param WP_Post|false|null $delete       Whether to go forward with deletion.
6632       * @param WP_Post            $post         Post object.
6633       * @param bool               $force_delete Whether to bypass the Trash.
6634       */
6635      $check = apply_filters( 'pre_delete_attachment', null, $post, $force_delete );
6636      if ( null !== $check ) {
6637          return $check;
6638      }
6639  
6640      delete_post_meta( $post_id, '_wp_trash_meta_status' );
6641      delete_post_meta( $post_id, '_wp_trash_meta_time' );
6642  
6643      $meta         = wp_get_attachment_metadata( $post_id );
6644      $backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true );
6645      $file         = get_attached_file( $post_id );
6646  
6647      if ( is_multisite() && is_string( $file ) && ! empty( $file ) ) {
6648          clean_dirsize_cache( $file );
6649      }
6650  
6651      /**
6652       * Fires before an attachment is deleted, at the start of wp_delete_attachment().
6653       *
6654       * @since 2.0.0
6655       * @since 5.5.0 Added the `$post` parameter.
6656       *
6657       * @param int     $post_id Attachment ID.
6658       * @param WP_Post $post    Post object.
6659       */
6660      do_action( 'delete_attachment', $post_id, $post );
6661  
6662      wp_delete_object_term_relationships( $post_id, array( 'category', 'post_tag' ) );
6663      wp_delete_object_term_relationships( $post_id, get_object_taxonomies( $post->post_type ) );
6664  
6665      // Delete all for any posts.
6666      delete_metadata( 'post', null, '_thumbnail_id', $post_id, true );
6667  
6668      wp_defer_comment_counting( true );
6669  
6670      $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d ORDER BY comment_ID DESC", $post_id ) );
6671      foreach ( $comment_ids as $comment_id ) {
6672          wp_delete_comment( $comment_id, true );
6673      }
6674  
6675      wp_defer_comment_counting( false );
6676  
6677      $post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id ) );
6678      foreach ( $post_meta_ids as $mid ) {
6679          delete_metadata_by_mid( 'post', $mid );
6680      }
6681  
6682      /** This action is documented in wp-includes/post.php */
6683      do_action( 'delete_post', $post_id, $post );
6684      $result = $wpdb->delete( $wpdb->posts, array( 'ID' => $post_id ) );
6685      if ( ! $result ) {
6686          return false;
6687      }
6688      /** This action is documented in wp-includes/post.php */
6689      do_action( 'deleted_post', $post_id, $post );
6690  
6691      wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file );
6692  
6693      clean_post_cache( $post );
6694  
6695      return $post;
6696  }
6697  
6698  /**
6699   * Deletes all files that belong to the given attachment.
6700   *
6701   * @since 4.9.7
6702   *
6703   * @global wpdb $wpdb WordPress database abstraction object.
6704   *
6705   * @param int    $post_id      Attachment ID.
6706   * @param array  $meta         The attachment's meta data.
6707   * @param array  $backup_sizes The meta data for the attachment's backup images.
6708   * @param string $file         Absolute path to the attachment's file.
6709   * @return bool True on success, false on failure.
6710   */
6711  function wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file ) {
6712      global $wpdb;
6713  
6714      $uploadpath = wp_get_upload_dir();
6715      $deleted    = true;
6716  
6717      if ( ! empty( $meta['thumb'] ) ) {
6718          // Don't delete the thumb if another attachment uses it.
6719          if ( ! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $wpdb->esc_like( $meta['thumb'] ) . '%', $post_id ) ) ) {
6720              $thumbfile = str_replace( wp_basename( $file ), $meta['thumb'], $file );
6721  
6722              if ( ! empty( $thumbfile ) ) {
6723                  $thumbfile = path_join( $uploadpath['basedir'], $thumbfile );
6724                  $thumbdir  = path_join( $uploadpath['basedir'], dirname( $file ) );
6725  
6726                  if ( ! wp_delete_file_from_directory( $thumbfile, $thumbdir ) ) {
6727                      $deleted = false;
6728                  }
6729              }
6730          }
6731      }
6732  
6733      // Remove intermediate and backup images if there are any.
6734      if ( isset( $meta['sizes'] ) && is_array( $meta['sizes'] ) ) {
6735          $intermediate_dir = path_join( $uploadpath['basedir'], dirname( $file ) );
6736  
6737          foreach ( $meta['sizes'] as $size => $sizeinfo ) {
6738              $intermediate_file = str_replace( wp_basename( $file ), $sizeinfo['file'], $file );
6739  
6740              if ( ! empty( $intermediate_file ) ) {
6741                  $intermediate_file = path_join( $uploadpath['basedir'], $intermediate_file );
6742  
6743                  if ( ! wp_delete_file_from_directory( $intermediate_file, $intermediate_dir ) ) {
6744                      $deleted = false;
6745                  }
6746              }
6747          }
6748      }
6749  
6750      if ( ! empty( $meta['original_image'] ) ) {
6751          if ( empty( $intermediate_dir ) ) {
6752              $intermediate_dir = path_join( $uploadpath['basedir'], dirname( $file ) );
6753          }
6754  
6755          $original_image = str_replace( wp_basename( $file ), $meta['original_image'], $file );
6756  
6757          if ( ! empty( $original_image ) ) {
6758              $original_image = path_join( $uploadpath['basedir'], $original_image );
6759  
6760              if ( ! wp_delete_file_from_directory( $original_image, $intermediate_dir ) ) {
6761                  $deleted = false;
6762              }
6763          }
6764      }
6765  
6766      if ( is_array( $backup_sizes ) ) {
6767          $del_dir = path_join( $uploadpath['basedir'], dirname( $meta['file'] ) );
6768  
6769          foreach ( $backup_sizes as $size ) {
6770              $del_file = path_join( dirname( $meta['file'] ), $size['file'] );
6771  
6772              if ( ! empty( $del_file ) ) {
6773                  $del_file = path_join( $uploadpath['basedir'], $del_file );
6774  
6775                  if ( ! wp_delete_file_from_directory( $del_file, $del_dir ) ) {
6776                      $deleted = false;
6777                  }
6778              }
6779          }
6780      }
6781  
6782      if ( ! wp_delete_file_from_directory( $file, $uploadpath['basedir'] ) ) {
6783          $deleted = false;
6784      }
6785  
6786      return $deleted;
6787  }
6788  
6789  /**
6790   * Retrieves attachment metadata for attachment ID.
6791   *
6792   * @since 2.1.0
6793   * @since 6.0.0 The `$filesize` value was added to the returned array.
6794   *
6795   * @param int  $attachment_id Attachment post ID. Defaults to global $post.
6796   * @param bool $unfiltered    Optional. If true, filters are not run. Default false.
6797   * @return array|false {
6798   *     Attachment metadata. False on failure.
6799   *
6800   *     @type int    $width      The width of the attachment.
6801   *     @type int    $height     The height of the attachment.
6802   *     @type string $file       The file path relative to `wp-content/uploads`.
6803   *     @type array  $sizes      Keys are size slugs, each value is an array containing
6804   *                              'file', 'width', 'height', and 'mime-type'.
6805   *     @type array  $image_meta Image metadata.
6806   *     @type int    $filesize   File size of the attachment.
6807   * }
6808   */
6809  function wp_get_attachment_metadata( $attachment_id = 0, $unfiltered = false ) {
6810      $attachment_id = (int) $attachment_id;
6811  
6812      if ( ! $attachment_id ) {
6813          $post = get_post();
6814  
6815          if ( ! $post ) {
6816              return false;
6817          }
6818  
6819          $attachment_id = $post->ID;
6820      }
6821  
6822      $data = get_post_meta( $attachment_id, '_wp_attachment_metadata', true );
6823  
6824      if ( ! $data ) {
6825          return false;
6826      }
6827  
6828      if ( $unfiltered ) {
6829          return $data;
6830      }
6831  
6832      /**
6833       * Filters the attachment meta data.
6834       *
6835       * @since 2.1.0
6836       *
6837       * @param array $data          Array of meta data for the given attachment.
6838       * @param int   $attachment_id Attachment post ID.
6839       */
6840      return apply_filters( 'wp_get_attachment_metadata', $data, $attachment_id );
6841  }
6842  
6843  /**
6844   * Updates metadata for an attachment.
6845   *
6846   * @since 2.1.0
6847   *
6848   * @param int   $attachment_id Attachment post ID.
6849   * @param array $data          Attachment meta data.
6850   * @return int|false False if $post is invalid.
6851   */
6852  function wp_update_attachment_metadata( $attachment_id, $data ) {
6853      $attachment_id = (int) $attachment_id;
6854  
6855      $post = get_post( $attachment_id );
6856  
6857      if ( ! $post ) {
6858          return false;
6859      }
6860  
6861      /**
6862       * Filters the updated attachment meta data.
6863       *
6864       * @since 2.1.0
6865       *
6866       * @param array $data          Array of updated attachment meta data.
6867       * @param int   $attachment_id Attachment post ID.
6868       */
6869      $data = apply_filters( 'wp_update_attachment_metadata', $data, $post->ID );
6870      if ( $data ) {
6871          return update_post_meta( $post->ID, '_wp_attachment_metadata', $data );
6872      } else {
6873          return delete_post_meta( $post->ID, '_wp_attachment_metadata' );
6874      }
6875  }
6876  
6877  /**
6878   * Retrieves the URL for an attachment.
6879   *
6880   * @since 2.1.0
6881   *
6882   * @global string $pagenow The filename of the current screen.
6883   *
6884   * @param int $attachment_id Optional. Attachment post ID. Defaults to global $post.
6885   * @return string|false Attachment URL, otherwise false.
6886   */
6887  function wp_get_attachment_url( $attachment_id = 0 ) {
6888      global $pagenow;
6889  
6890      $attachment_id = (int) $attachment_id;
6891  
6892      $post = get_post( $attachment_id );
6893  
6894      if ( ! $post ) {
6895          return false;
6896      }
6897  
6898      if ( 'attachment' !== $post->post_type ) {
6899          return false;
6900      }
6901  
6902      $url = '';
6903      // Get attached file.
6904      $file = get_post_meta( $post->ID, '_wp_attached_file', true );
6905      if ( $file ) {
6906          // Get upload directory.
6907          $uploads = wp_get_upload_dir();
6908          if ( $uploads && false === $uploads['error'] ) {
6909              // Check that the upload base exists in the file location.
6910              if ( str_starts_with( $file, $uploads['basedir'] ) ) {
6911                  // Replace file location with url location.
6912                  $url = str_replace( $uploads['basedir'], $uploads['baseurl'], $file );
6913              } elseif ( str_contains( $file, 'wp-content/uploads' ) ) {
6914                  // Get the directory name relative to the basedir (back compat for pre-2.7 uploads).
6915                  $url = trailingslashit( $uploads['baseurl'] . '/' . _wp_get_attachment_relative_path( $file ) ) . wp_basename( $file );
6916              } else {
6917                  // It's a newly-uploaded file, therefore $file is relative to the basedir.
6918                  $url = $uploads['baseurl'] . "/$file";
6919              }
6920          }
6921      }
6922  
6923      /*
6924       * If any of the above options failed, Fallback on the GUID as used pre-2.7,
6925       * not recommended to rely upon this.
6926       */
6927      if ( ! $url ) {
6928          $url = get_the_guid( $post->ID );
6929      }
6930  
6931      // On SSL front end, URLs should be HTTPS.
6932      if ( is_ssl() && ! is_admin() && 'wp-login.php' !== $pagenow ) {
6933          $url = set_url_scheme( $url );
6934      }
6935  
6936      /**
6937       * Filters the attachment URL.
6938       *
6939       * @since 2.1.0
6940       *
6941       * @param string $url           URL for the given attachment.
6942       * @param int    $attachment_id Attachment post ID.
6943       */
6944      $url = apply_filters( 'wp_get_attachment_url', $url, $post->ID );
6945  
6946      if ( ! $url ) {
6947          return false;
6948      }
6949  
6950      return $url;
6951  }
6952  
6953  /**
6954   * Retrieves the caption for an attachment.
6955   *
6956   * @since 4.6.0
6957   *
6958   * @param int $post_id Optional. Attachment ID. Default is the ID of the global `$post`.
6959   * @return string|false Attachment caption on success, false on failure.
6960   */
6961  function wp_get_attachment_caption( $post_id = 0 ) {
6962      $post_id = (int) $post_id;
6963      $post    = get_post( $post_id );
6964  
6965      if ( ! $post ) {
6966          return false;
6967      }
6968  
6969      if ( 'attachment' !== $post->post_type ) {
6970          return false;
6971      }
6972  
6973      $caption = $post->post_excerpt;
6974  
6975      /**
6976       * Filters the attachment caption.
6977       *
6978       * @since 4.6.0
6979       *
6980       * @param string $caption Caption for the given attachment.
6981       * @param int    $post_id Attachment ID.
6982       */
6983      return apply_filters( 'wp_get_attachment_caption', $caption, $post->ID );
6984  }
6985  
6986  /**
6987   * Retrieves URL for an attachment thumbnail.
6988   *
6989   * @since 2.1.0
6990   * @since 6.1.0 Changed to use wp_get_attachment_image_url().
6991   *
6992   * @param int $post_id Optional. Attachment ID. Default is the ID of the global `$post`.
6993   * @return string|false Thumbnail URL on success, false on failure.
6994   */
6995  function wp_get_attachment_thumb_url( $post_id = 0 ) {
6996      $post_id = (int) $post_id;
6997  
6998      /*
6999       * This uses image_downsize() which also looks for the (very) old format $image_meta['thumb']
7000       * when the newer format $image_meta['sizes']['thumbnail'] doesn't exist.
7001       */
7002      $thumbnail_url = wp_get_attachment_image_url( $post_id, 'thumbnail' );
7003  
7004      if ( empty( $thumbnail_url ) ) {
7005          return false;
7006      }
7007  
7008      /**
7009       * Filters the attachment thumbnail URL.
7010       *
7011       * @since 2.1.0
7012       *
7013       * @param string $thumbnail_url URL for the attachment thumbnail.
7014       * @param int    $post_id       Attachment ID.
7015       */
7016      return apply_filters( 'wp_get_attachment_thumb_url', $thumbnail_url, $post_id );
7017  }
7018  
7019  /**
7020   * Verifies an attachment is of a given type.
7021   *
7022   * @since 4.2.0
7023   *
7024   * @param string      $type Attachment type. Accepts `image`, `audio`, `video`, or a file extension.
7025   * @param int|WP_Post $post Optional. Attachment ID or object. Default is global $post.
7026   * @return bool True if an accepted type or a matching file extension, false otherwise.
7027   */
7028  function wp_attachment_is( $type, $post = null ) {
7029      $post = get_post( $post );
7030  
7031      if ( ! $post ) {
7032          return false;
7033      }
7034  
7035      $file = get_attached_file( $post->ID );
7036  
7037      if ( ! $file ) {
7038          return false;
7039      }
7040  
7041      if ( str_starts_with( $post->post_mime_type, $type . '/' ) ) {
7042          return true;
7043      }
7044  
7045      $check = wp_check_filetype( $file );
7046  
7047      if ( empty( $check['ext'] ) ) {
7048          return false;
7049      }
7050  
7051      $ext = $check['ext'];
7052  
7053      if ( 'import' !== $post->post_mime_type ) {
7054          return $type === $ext;
7055      }
7056  
7057      switch ( $type ) {
7058          case 'image':
7059              $image_exts = array( 'jpg', 'jpeg', 'jpe', 'gif', 'png', 'webp', 'avif', 'heic' );
7060              return in_array( $ext, $image_exts, true );
7061  
7062          case 'audio':
7063              return in_array( $ext, wp_get_audio_extensions(), true );
7064  
7065          case 'video':
7066              return in_array( $ext, wp_get_video_extensions(), true );
7067  
7068          default:
7069              return $type === $ext;
7070      }
7071  }
7072  
7073  /**
7074   * Determines whether an attachment is an image.
7075   *
7076   * For more information on this and similar theme functions, check out
7077   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
7078   * Conditional Tags} article in the Theme Developer Handbook.
7079   *
7080   * @since 2.1.0
7081   * @since 4.2.0 Modified into wrapper for wp_attachment_is() and
7082   *              allowed WP_Post object to be passed.
7083   *
7084   * @param int|WP_Post $post Optional. Attachment ID or object. Default is global $post.
7085   * @return bool Whether the attachment is an image.
7086   */
7087  function wp_attachment_is_image( $post = null ) {
7088      return wp_attachment_is( 'image', $post );
7089  }
7090  
7091  /**
7092   * Retrieves the icon for a MIME type or attachment.
7093   *
7094   * @since 2.1.0
7095   * @since 6.5.0 Added the `$preferred_ext` parameter.
7096   *
7097   * @param string|int $mime          MIME type or attachment ID.
7098   * @param string     $preferred_ext File format to prefer in return. Default '.png'.
7099   * @return string|false Icon, false otherwise.
7100   */
7101  function wp_mime_type_icon( $mime = 0, $preferred_ext = '.png' ) {
7102      if ( ! is_numeric( $mime ) ) {
7103          $icon = wp_cache_get( "mime_type_icon_$mime" );
7104      }
7105  
7106      // Check if preferred file format variable is present and is a validly formatted file extension.
7107      if ( ! empty( $preferred_ext ) && is_string( $preferred_ext ) && ! str_starts_with( $preferred_ext, '.' ) ) {
7108          $preferred_ext = '.' . strtolower( $preferred_ext );
7109      }
7110  
7111      $post_id = 0;
7112      if ( empty( $icon ) ) {
7113          $post_mimes = array();
7114          if ( is_numeric( $mime ) ) {
7115              $mime = (int) $mime;
7116              $post = get_post( $mime );
7117              if ( $post ) {
7118                  $post_id = (int) $post->ID;
7119                  $file    = get_attached_file( $post_id );
7120                  $ext     = preg_replace( '/^.+?\.([^.]+)$/', '$1', $file );
7121                  if ( ! empty( $ext ) ) {
7122                      $post_mimes[] = $ext;
7123                      $ext_type     = wp_ext2type( $ext );
7124                      if ( $ext_type ) {
7125                          $post_mimes[] = $ext_type;
7126                      }
7127                  }
7128                  $mime = $post->post_mime_type;
7129              } else {
7130                  $mime = 0;
7131              }
7132          } else {
7133              $post_mimes[] = $mime;
7134          }
7135  
7136          $icon_files = wp_cache_get( 'icon_files' );
7137  
7138          if ( ! is_array( $icon_files ) ) {
7139              /**
7140               * Filters the icon directory path.
7141               *
7142               * @since 2.0.0
7143               *
7144               * @param string $path Icon directory absolute path.
7145               */
7146              $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/media' );
7147  
7148              /**
7149               * Filters the icon directory URI.
7150               *
7151               * @since 2.0.0
7152               *
7153               * @param string $uri Icon directory URI.
7154               */
7155              $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) );
7156  
7157              /**
7158               * Filters the array of icon directory URIs.
7159               *
7160               * @since 2.5.0
7161               *
7162               * @param string[] $uris Array of icon directory URIs keyed by directory absolute path.
7163               */
7164              $dirs       = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) );
7165              $icon_files = array();
7166              $all_icons  = array();
7167              while ( $dirs ) {
7168                  $keys = array_keys( $dirs );
7169                  $dir  = array_shift( $keys );
7170                  $uri  = array_shift( $dirs );
7171                  $dh   = opendir( $dir );
7172                  if ( $dh ) {
7173                      while ( false !== $file = readdir( $dh ) ) {
7174                          $file = wp_basename( $file );
7175                          if ( str_starts_with( $file, '.' ) ) {
7176                              continue;
7177                          }
7178  
7179                          $ext = strtolower( substr( $file, -4 ) );
7180                          if ( ! in_array( $ext, array( '.svg', '.png', '.gif', '.jpg' ), true ) ) {
7181                              if ( is_dir( "$dir/$file" ) ) {
7182                                  $dirs[ "$dir/$file" ] = "$uri/$file";
7183                              }
7184                              continue;
7185                          }
7186                          $all_icons[ "$dir/$file" ] = "$uri/$file";
7187                          if ( $ext === $preferred_ext ) {
7188                              $icon_files[ "$dir/$file" ] = "$uri/$file";
7189                          }
7190                      }
7191                      closedir( $dh );
7192                  }
7193              }
7194              // If directory only contained icons of a non-preferred format, return those.
7195              if ( empty( $icon_files ) ) {
7196                  $icon_files = $all_icons;
7197              }
7198              wp_cache_add( 'icon_files', $icon_files, 'default', 600 );
7199          }
7200  
7201          $types = array();
7202          // Icon wp_basename - extension = MIME wildcard.
7203          foreach ( $icon_files as $file => $uri ) {
7204              $types[ preg_replace( '/^([^.]*).*$/', '$1', wp_basename( $file ) ) ] =& $icon_files[ $file ];
7205          }
7206  
7207          if ( ! empty( $mime ) ) {
7208              $post_mimes[] = substr( $mime, 0, strpos( $mime, '/' ) );
7209              $post_mimes[] = substr( $mime, strpos( $mime, '/' ) + 1 );
7210              $post_mimes[] = str_replace( '/', '_', $mime );
7211          }
7212  
7213          $matches            = wp_match_mime_types( array_keys( $types ), $post_mimes );
7214          $matches['default'] = array( 'default' );
7215  
7216          foreach ( $matches as $match => $wilds ) {
7217              foreach ( $wilds as $wild ) {
7218                  if ( ! isset( $types[ $wild ] ) ) {
7219                      continue;
7220                  }
7221  
7222                  $icon = $types[ $wild ];
7223                  if ( ! is_numeric( $mime ) ) {
7224                      wp_cache_add( "mime_type_icon_$mime", $icon );
7225                  }
7226                  break 2;
7227              }
7228          }
7229      }
7230  
7231      /**
7232       * Filters the mime type icon.
7233       *
7234       * @since 2.1.0
7235       *
7236       * @param string $icon    Path to the mime type icon.
7237       * @param string $mime    Mime type.
7238       * @param int    $post_id Attachment ID. Will equal 0 if the function passed
7239       *                        the mime type.
7240       */
7241      return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id );
7242  }
7243  
7244  /**
7245   * Checks for changed slugs for published post objects and save the old slug.
7246   *
7247   * The function is used when a post object of any type is updated,
7248   * by comparing the current and previous post objects.
7249   *
7250   * If the slug was changed and not already part of the old slugs then it will be
7251   * added to the post meta field ('_wp_old_slug') for storing old slugs for that
7252   * post.
7253   *
7254   * The most logically usage of this function is redirecting changed post objects, so
7255   * that those that linked to an changed post will be redirected to the new post.
7256   *
7257   * @since 2.1.0
7258   *
7259   * @param int     $post_id     Post ID.
7260   * @param WP_Post $post        The post object.
7261   * @param WP_Post $post_before The previous post object.
7262   */
7263  function wp_check_for_changed_slugs( $post_id, $post, $post_before ) {
7264      // Don't bother if it hasn't changed.
7265      if ( $post->post_name === $post_before->post_name ) {
7266          return;
7267      }
7268  
7269      // We're only concerned with published, non-hierarchical objects.
7270      if ( ! ( 'publish' === $post->post_status || ( 'attachment' === $post->post_type && 'inherit' === $post->post_status ) )
7271          || is_post_type_hierarchical( $post->post_type )
7272      ) {
7273          return;
7274      }
7275  
7276      $old_slugs = (array) get_post_meta( $post_id, '_wp_old_slug' );
7277  
7278      // If we haven't added this old slug before, add it now.
7279      if ( ! empty( $post_before->post_name ) && ! in_array( $post_before->post_name, $old_slugs, true ) ) {
7280          add_post_meta( $post_id, '_wp_old_slug', $post_before->post_name );
7281      }
7282  
7283      // If the new slug was used previously, delete it from the list.
7284      if ( in_array( $post->post_name, $old_slugs, true ) ) {
7285          delete_post_meta( $post_id, '_wp_old_slug', $post->post_name );
7286      }
7287  }
7288  
7289  /**
7290   * Checks for changed dates for published post objects and save the old date.
7291   *
7292   * The function is used when a post object of any type is updated,
7293   * by comparing the current and previous post objects.
7294   *
7295   * If the date was changed and not already part of the old dates then it will be
7296   * added to the post meta field ('_wp_old_date') for storing old dates for that
7297   * post.
7298   *
7299   * The most logically usage of this function is redirecting changed post objects, so
7300   * that those that linked to an changed post will be redirected to the new post.
7301   *
7302   * @since 4.9.3
7303   *
7304   * @param int     $post_id     Post ID.
7305   * @param WP_Post $post        The post object.
7306   * @param WP_Post $post_before The previous post object.
7307   */
7308  function wp_check_for_changed_dates( $post_id, $post, $post_before ) {
7309      $previous_date = gmdate( 'Y-m-d', strtotime( $post_before->post_date ) );
7310      $new_date      = gmdate( 'Y-m-d', strtotime( $post->post_date ) );
7311  
7312      // Don't bother if it hasn't changed.
7313      if ( $new_date === $previous_date ) {
7314          return;
7315      }
7316  
7317      // We're only concerned with published, non-hierarchical objects.
7318      if ( ! ( 'publish' === $post->post_status || ( 'attachment' === $post->post_type && 'inherit' === $post->post_status ) )
7319          || is_post_type_hierarchical( $post->post_type )
7320      ) {
7321          return;
7322      }
7323  
7324      $old_dates = (array) get_post_meta( $post_id, '_wp_old_date' );
7325  
7326      // If we haven't added this old date before, add it now.
7327      if ( ! empty( $previous_date ) && ! in_array( $previous_date, $old_dates, true ) ) {
7328          add_post_meta( $post_id, '_wp_old_date', $previous_date );
7329      }
7330  
7331      // If the new slug was used previously, delete it from the list.
7332      if ( in_array( $new_date, $old_dates, true ) ) {
7333          delete_post_meta( $post_id, '_wp_old_date', $new_date );
7334      }
7335  }
7336  
7337  /**
7338   * Retrieves the private post SQL based on capability.
7339   *
7340   * This function provides a standardized way to appropriately select on the
7341   * post_status of a post type. The function will return a piece of SQL code
7342   * that can be added to a WHERE clause; this SQL is constructed to allow all
7343   * published posts, and all private posts to which the user has access.
7344   *
7345   * @since 2.2.0
7346   * @since 4.3.0 Added the ability to pass an array to `$post_type`.
7347   *
7348   * @param string|array $post_type Single post type or an array of post types. Currently only supports 'post' or 'page'.
7349   * @return string SQL code that can be added to a where clause.
7350   */
7351  function get_private_posts_cap_sql( $post_type ) {
7352      return get_posts_by_author_sql( $post_type, false );
7353  }
7354  
7355  /**
7356   * Retrieves the post SQL based on capability, author, and type.
7357   *
7358   * @since 3.0.0
7359   * @since 4.3.0 Introduced the ability to pass an array of post types to `$post_type`.
7360   *
7361   * @see get_private_posts_cap_sql()
7362   * @global wpdb $wpdb WordPress database abstraction object.
7363   *
7364   * @param string|string[] $post_type   Single post type or an array of post types.
7365   * @param bool            $full        Optional. Returns a full WHERE statement instead of just
7366   *                                     an 'andalso' term. Default true.
7367   * @param int             $post_author Optional. Query posts having a single author ID. Default null.
7368   * @param bool            $public_only Optional. Only return public posts. Skips cap checks for
7369   *                                     $current_user.  Default false.
7370   * @return string SQL WHERE code that can be added to a query.
7371   */
7372  function get_posts_by_author_sql( $post_type, $full = true, $post_author = null, $public_only = false ) {
7373      global $wpdb;
7374  
7375      if ( is_array( $post_type ) ) {
7376          $post_types = $post_type;
7377      } else {
7378          $post_types = array( $post_type );
7379      }
7380  
7381      $post_type_clauses = array();
7382      foreach ( $post_types as $post_type ) {
7383          $post_type_obj = get_post_type_object( $post_type );
7384  
7385          if ( ! $post_type_obj ) {
7386              continue;
7387          }
7388  
7389          /**
7390           * Filters the capability to read private posts for a custom post type
7391           * when generating SQL for getting posts by author.
7392           *
7393           * @since 2.2.0
7394           * @deprecated 3.2.0 The hook transitioned from "somewhat useless" to "totally useless".
7395           *
7396           * @param string $cap Capability.
7397           */
7398          $cap = apply_filters_deprecated( 'pub_priv_sql_capability', array( '' ), '3.2.0' );
7399  
7400          if ( ! $cap ) {
7401              $cap = current_user_can( $post_type_obj->cap->read_private_posts );
7402          }
7403  
7404          // Only need to check the cap if $public_only is false.
7405          $post_status_sql = "post_status = 'publish'";
7406  
7407          if ( false === $public_only ) {
7408              if ( $cap ) {
7409                  // Does the user have the capability to view private posts? Guess so.
7410                  $post_status_sql .= " OR post_status = 'private'";
7411              } elseif ( is_user_logged_in() ) {
7412                  // Users can view their own private posts.
7413                  $id = get_current_user_id();
7414                  if ( null === $post_author || ! $full ) {
7415                      $post_status_sql .= " OR post_status = 'private' AND post_author = $id";
7416                  } elseif ( $id === (int) $post_author ) {
7417                      $post_status_sql .= " OR post_status = 'private'";
7418                  } // Else none.
7419              } // Else none.
7420          }
7421  
7422          $post_type_clauses[] = "( post_type = '" . $post_type . "' AND ( $post_status_sql ) )";
7423      }
7424  
7425      if ( empty( $post_type_clauses ) ) {
7426          return $full ? 'WHERE 1 = 0' : '1 = 0';
7427      }
7428  
7429      $sql = '( ' . implode( ' OR ', $post_type_clauses ) . ' )';
7430  
7431      if ( null !== $post_author ) {
7432          $sql .= $wpdb->prepare( ' AND post_author = %d', $post_author );
7433      }
7434  
7435      if ( $full ) {
7436          $sql = 'WHERE ' . $sql;
7437      }
7438  
7439      return $sql;
7440  }
7441  
7442  /**
7443   * Retrieves the most recent time that a post on the site was published.
7444   *
7445   * The server timezone is the default and is the difference between GMT and
7446   * server time. The 'blog' value is the date when the last post was posted.
7447   * The 'gmt' is when the last post was posted in GMT formatted date.
7448   *
7449   * @since 0.71
7450   * @since 4.4.0 The `$post_type` argument was added.
7451   *
7452   * @param string $timezone  Optional. The timezone for the timestamp. Accepts 'server', 'blog', or 'gmt'.
7453   *                          'server' uses the server's internal timezone.
7454   *                          'blog' uses the `post_date` field, which proxies to the timezone set for the site.
7455   *                          'gmt' uses the `post_date_gmt` field.
7456   *                          Default 'server'.
7457   * @param string $post_type Optional. The post type to check. Default 'any'.
7458   * @return string The date of the last post, or false on failure.
7459   */
7460  function get_lastpostdate( $timezone = 'server', $post_type = 'any' ) {
7461      $lastpostdate = _get_last_post_time( $timezone, 'date', $post_type );
7462  
7463      /**
7464       * Filters the most recent time that a post on the site was published.
7465       *
7466       * @since 2.3.0
7467       * @since 5.5.0 Added the `$post_type` parameter.
7468       *
7469       * @param string|false $lastpostdate The most recent time that a post was published,
7470       *                                   in 'Y-m-d H:i:s' format. False on failure.
7471       * @param string       $timezone     Location to use for getting the post published date.
7472       *                                   See get_lastpostdate() for accepted `$timezone` values.
7473       * @param string       $post_type    The post type to check.
7474       */
7475      return apply_filters( 'get_lastpostdate', $lastpostdate, $timezone, $post_type );
7476  }
7477  
7478  /**
7479   * Gets the most recent time that a post on the site was modified.
7480   *
7481   * The server timezone is the default and is the difference between GMT and
7482   * server time. The 'blog' value is just when the last post was modified.
7483   * The 'gmt' is when the last post was modified in GMT time.
7484   *
7485   * @since 1.2.0
7486   * @since 4.4.0 The `$post_type` argument was added.
7487   *
7488   * @param string $timezone  Optional. The timezone for the timestamp. See get_lastpostdate()
7489   *                          for information on accepted values.
7490   *                          Default 'server'.
7491   * @param string $post_type Optional. The post type to check. Default 'any'.
7492   * @return string The timestamp in 'Y-m-d H:i:s' format, or false on failure.
7493   */
7494  function get_lastpostmodified( $timezone = 'server', $post_type = 'any' ) {
7495      /**
7496       * Pre-filter the return value of get_lastpostmodified() before the query is run.
7497       *
7498       * @since 4.4.0
7499       *
7500       * @param string|false $lastpostmodified The most recent time that a post was modified,
7501       *                                       in 'Y-m-d H:i:s' format, or false. Returning anything
7502       *                                       other than false will short-circuit the function.
7503       * @param string       $timezone         Location to use for getting the post modified date.
7504       *                                       See get_lastpostdate() for accepted `$timezone` values.
7505       * @param string       $post_type        The post type to check.
7506       */
7507      $lastpostmodified = apply_filters( 'pre_get_lastpostmodified', false, $timezone, $post_type );
7508  
7509      if ( false !== $lastpostmodified ) {
7510          return $lastpostmodified;
7511      }
7512  
7513      $lastpostmodified = _get_last_post_time( $timezone, 'modified', $post_type );
7514      $lastpostdate     = get_lastpostdate( $timezone, $post_type );
7515  
7516      if ( $lastpostdate > $lastpostmodified ) {
7517          $lastpostmodified = $lastpostdate;
7518      }
7519  
7520      /**
7521       * Filters the most recent time that a post on the site was modified.
7522       *
7523       * @since 2.3.0
7524       * @since 5.5.0 Added the `$post_type` parameter.
7525       *
7526       * @param string|false $lastpostmodified The most recent time that a post was modified,
7527       *                                       in 'Y-m-d H:i:s' format. False on failure.
7528       * @param string       $timezone         Location to use for getting the post modified date.
7529       *                                       See get_lastpostdate() for accepted `$timezone` values.
7530       * @param string       $post_type        The post type to check.
7531       */
7532      return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone, $post_type );
7533  }
7534  
7535  /**
7536   * Gets the timestamp of the last time any post was modified or published.
7537   *
7538   * @since 3.1.0
7539   * @since 4.4.0 The `$post_type` argument was added.
7540   * @access private
7541   *
7542   * @global wpdb $wpdb WordPress database abstraction object.
7543   *
7544   * @param string $timezone  The timezone for the timestamp. See get_lastpostdate().
7545   *                          for information on accepted values.
7546   * @param string $field     Post field to check. Accepts 'date' or 'modified'.
7547   * @param string $post_type Optional. The post type to check. Default 'any'.
7548   * @return string|false The timestamp in 'Y-m-d H:i:s' format, or false on failure.
7549   */
7550  function _get_last_post_time( $timezone, $field, $post_type = 'any' ) {
7551      global $wpdb;
7552  
7553      if ( ! in_array( $field, array( 'date', 'modified' ), true ) ) {
7554          return false;
7555      }
7556  
7557      $timezone = strtolower( $timezone );
7558  
7559      $key = "lastpost{$field}:$timezone";
7560      if ( 'any' !== $post_type ) {
7561          $key .= ':' . sanitize_key( $post_type );
7562      }
7563  
7564      $date = wp_cache_get( $key, 'timeinfo' );
7565      if ( false !== $date ) {
7566          return $date;
7567      }
7568  
7569      if ( 'any' === $post_type ) {
7570          $post_types = get_post_types( array( 'public' => true ) );
7571          array_walk( $post_types, array( $wpdb, 'escape_by_ref' ) );
7572          $post_types = "'" . implode( "', '", $post_types ) . "'";
7573      } else {
7574          $post_types = "'" . sanitize_key( $post_type ) . "'";
7575      }
7576  
7577      switch ( $timezone ) {
7578          case 'gmt':
7579              $date = $wpdb->get_var( "SELECT post_{$field}_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1" );
7580              break;
7581          case 'blog':
7582              $date = $wpdb->get_var( "SELECT post_{$field} FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1" );
7583              break;
7584          case 'server':
7585              $add_seconds_server = gmdate( 'Z' );
7586              $date               = $wpdb->get_var( "SELECT DATE_ADD(post_{$field}_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type IN ({$post_types}) ORDER BY post_{$field}_gmt DESC LIMIT 1" );
7587              break;
7588      }
7589  
7590      if ( $date ) {
7591          wp_cache_set( $key, $date, 'timeinfo' );
7592  
7593          return $date;
7594      }
7595  
7596      return false;
7597  }
7598  
7599  /**
7600   * Updates posts in cache.
7601   *
7602   * @since 1.5.1
7603   *
7604   * @param WP_Post[] $posts Array of post objects (passed by reference).
7605   */
7606  function update_post_cache( &$posts ) {
7607      if ( ! $posts ) {
7608          return;
7609      }
7610  
7611      $data = array();
7612      foreach ( $posts as $post ) {
7613          if ( empty( $post->filter ) || 'raw' !== $post->filter ) {
7614              $post = sanitize_post( $post, 'raw' );
7615          }
7616          $data[ $post->ID ] = $post;
7617      }
7618      wp_cache_add_multiple( $data, 'posts' );
7619  }
7620  
7621  /**
7622   * Will clean the post in the cache.
7623   *
7624   * Cleaning means delete from the cache of the post. Will call to clean the term
7625   * object cache associated with the post ID.
7626   *
7627   * This function not run if $_wp_suspend_cache_invalidation is not empty. See
7628   * wp_suspend_cache_invalidation().
7629   *
7630   * @since 2.0.0
7631   *
7632   * @global bool $_wp_suspend_cache_invalidation
7633   *
7634   * @param int|WP_Post $post Post ID or post object to remove from the cache.
7635   */
7636  function clean_post_cache( $post ) {
7637      global $_wp_suspend_cache_invalidation;
7638  
7639      if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
7640          return;
7641      }
7642  
7643      $post = get_post( $post );
7644  
7645      if ( ! $post ) {
7646          return;
7647      }
7648  
7649      wp_cache_delete( $post->ID, 'posts' );
7650      wp_cache_delete( 'post_parent:' . (string) $post->ID, 'posts' );
7651      wp_cache_delete( $post->ID, 'post_meta' );
7652  
7653      clean_object_term_cache( $post->ID, $post->post_type );
7654  
7655      wp_cache_delete( 'wp_get_archives', 'general' );
7656  
7657      /**
7658       * Fires immediately after the given post's cache is cleaned.
7659       *
7660       * @since 2.5.0
7661       *
7662       * @param int     $post_id Post ID.
7663       * @param WP_Post $post    Post object.
7664       */
7665      do_action( 'clean_post_cache', $post->ID, $post );
7666  
7667      if ( 'page' === $post->post_type ) {
7668          wp_cache_delete( 'all_page_ids', 'posts' );
7669  
7670          /**
7671           * Fires immediately after the given page's cache is cleaned.
7672           *
7673           * @since 2.5.0
7674           *
7675           * @param int $post_id Post ID.
7676           */
7677          do_action( 'clean_page_cache', $post->ID );
7678      }
7679  
7680      wp_cache_set_posts_last_changed();
7681  }
7682  
7683  /**
7684   * Updates post, term, and metadata caches for a list of post objects.
7685   *
7686   * @since 1.5.0
7687   *
7688   * @param WP_Post[] $posts             Array of post objects (passed by reference).
7689   * @param string    $post_type         Optional. Post type. Default 'post'.
7690   * @param bool      $update_term_cache Optional. Whether to update the term cache. Default true.
7691   * @param bool      $update_meta_cache Optional. Whether to update the meta cache. Default true.
7692   */
7693  function update_post_caches( &$posts, $post_type = 'post', $update_term_cache = true, $update_meta_cache = true ) {
7694      // No point in doing all this work if we didn't match any posts.
7695      if ( ! $posts ) {
7696          return;
7697      }
7698  
7699      update_post_cache( $posts );
7700  
7701      $post_ids = array();
7702      foreach ( $posts as $post ) {
7703          $post_ids[] = $post->ID;
7704      }
7705  
7706      if ( ! $post_type ) {
7707          $post_type = 'any';
7708      }
7709  
7710      if ( $update_term_cache ) {
7711          if ( is_array( $post_type ) ) {
7712              $ptypes = $post_type;
7713          } elseif ( 'any' === $post_type ) {
7714              $ptypes = array();
7715              // Just use the post_types in the supplied posts.
7716              foreach ( $posts as $post ) {
7717                  $ptypes[] = $post->post_type;
7718              }
7719              $ptypes = array_unique( $ptypes );
7720          } else {
7721              $ptypes = array( $post_type );
7722          }
7723  
7724          if ( ! empty( $ptypes ) ) {
7725              update_object_term_cache( $post_ids, $ptypes );
7726          }
7727      }
7728  
7729      if ( $update_meta_cache ) {
7730          update_postmeta_cache( $post_ids );
7731      }
7732  }
7733  
7734  /**
7735   * Updates post author user caches for a list of post objects.
7736   *
7737   * @since 6.1.0
7738   *
7739   * @param WP_Post[] $posts Array of post objects.
7740   */
7741  function update_post_author_caches( $posts ) {
7742      /*
7743       * cache_users() is a pluggable function so is not available prior
7744       * to the `plugins_loaded` hook firing. This is to ensure against
7745       * fatal errors when the function is not available.
7746       */
7747      if ( ! function_exists( 'cache_users' ) ) {
7748          return;
7749      }
7750  
7751      $author_ids = wp_list_pluck( $posts, 'post_author' );
7752      $author_ids = array_map( 'absint', $author_ids );
7753      $author_ids = array_unique( array_filter( $author_ids ) );
7754  
7755      cache_users( $author_ids );
7756  }
7757  
7758  /**
7759   * Updates parent post caches for a list of post objects.
7760   *
7761   * @since 6.1.0
7762   *
7763   * @param WP_Post[] $posts Array of post objects.
7764   */
7765  function update_post_parent_caches( $posts ) {
7766      $parent_ids = wp_list_pluck( $posts, 'post_parent' );
7767      $parent_ids = array_map( 'absint', $parent_ids );
7768      $parent_ids = array_unique( array_filter( $parent_ids ) );
7769  
7770      if ( ! empty( $parent_ids ) ) {
7771          _prime_post_caches( $parent_ids, false );
7772      }
7773  }
7774  
7775  /**
7776   * Updates metadata cache for a list of post IDs.
7777   *
7778   * Performs SQL query to retrieve the metadata for the post IDs and updates the
7779   * metadata cache for the posts. Therefore, the functions, which call this
7780   * function, do not need to perform SQL queries on their own.
7781   *
7782   * @since 2.1.0
7783   *
7784   * @param int[] $post_ids Array of post IDs.
7785   * @return array|false An array of metadata on success, false if there is nothing to update.
7786   */
7787  function update_postmeta_cache( $post_ids ) {
7788      return update_meta_cache( 'post', $post_ids );
7789  }
7790  
7791  /**
7792   * Will clean the attachment in the cache.
7793   *
7794   * Cleaning means delete from the cache. Optionally will clean the term
7795   * object cache associated with the attachment ID.
7796   *
7797   * This function will not run if $_wp_suspend_cache_invalidation is not empty.
7798   *
7799   * @since 3.0.0
7800   *
7801   * @global bool $_wp_suspend_cache_invalidation
7802   *
7803   * @param int  $id          The attachment ID in the cache to clean.
7804   * @param bool $clean_terms Optional. Whether to clean terms cache. Default false.
7805   */
7806  function clean_attachment_cache( $id, $clean_terms = false ) {
7807      global $_wp_suspend_cache_invalidation;
7808  
7809      if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
7810          return;
7811      }
7812  
7813      $id = (int) $id;
7814  
7815      wp_cache_delete( $id, 'posts' );
7816      wp_cache_delete( $id, 'post_meta' );
7817  
7818      if ( $clean_terms ) {
7819          clean_object_term_cache( $id, 'attachment' );
7820      }
7821  
7822      /**
7823       * Fires after the given attachment's cache is cleaned.
7824       *
7825       * @since 3.0.0
7826       *
7827       * @param int $id Attachment ID.
7828       */
7829      do_action( 'clean_attachment_cache', $id );
7830  }
7831  
7832  //
7833  // Hooks.
7834  //
7835  
7836  /**
7837   * Hook for managing future post transitions to published.
7838   *
7839   * @since 2.3.0
7840   * @access private
7841   *
7842   * @see wp_clear_scheduled_hook()
7843   * @global wpdb $wpdb WordPress database abstraction object.
7844   *
7845   * @param string  $new_status New post status.
7846   * @param string  $old_status Previous post status.
7847   * @param WP_Post $post       Post object.
7848   */
7849  function _transition_post_status( $new_status, $old_status, $post ) {
7850      global $wpdb;
7851  
7852      if ( 'publish' !== $old_status && 'publish' === $new_status ) {
7853          // Reset GUID if transitioning to publish and it is empty.
7854          if ( '' === get_the_guid( $post->ID ) ) {
7855              $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
7856          }
7857  
7858          /**
7859           * Fires when a post's status is transitioned from private to published.
7860           *
7861           * @since 1.5.0
7862           * @deprecated 2.3.0 Use {@see 'private_to_publish'} instead.
7863           *
7864           * @param int $post_id Post ID.
7865           */
7866          do_action_deprecated( 'private_to_published', array( $post->ID ), '2.3.0', 'private_to_publish' );
7867      }
7868  
7869      // If published posts changed clear the lastpostmodified cache.
7870      if ( 'publish' === $new_status || 'publish' === $old_status ) {
7871          foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) {
7872              wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' );
7873              wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' );
7874              wp_cache_delete( "lastpostdate:$timezone:{$post->post_type}", 'timeinfo' );
7875          }
7876      }
7877  
7878      if ( $new_status !== $old_status ) {
7879          wp_cache_delete( _count_posts_cache_key( $post->post_type ), 'counts' );
7880          wp_cache_delete( _count_posts_cache_key( $post->post_type, 'readable' ), 'counts' );
7881      }
7882  
7883      // Always clears the hook in case the post status bounced from future to draft.
7884      wp_clear_scheduled_hook( 'publish_future_post', array( $post->ID ) );
7885  }
7886  
7887  /**
7888   * Hook used to schedule publication for a post marked for the future.
7889   *
7890   * The $post properties used and must exist are 'ID' and 'post_date_gmt'.
7891   *
7892   * @since 2.3.0
7893   * @access private
7894   *
7895   * @param int     $deprecated Not used. Can be set to null. Never implemented. Not marked
7896   *                            as deprecated with _deprecated_argument() as it conflicts with
7897   *                            wp_transition_post_status() and the default filter for _future_post_hook().
7898   * @param WP_Post $post       Post object.
7899   */
7900  function _future_post_hook( $deprecated, $post ) {
7901      wp_clear_scheduled_hook( 'publish_future_post', array( $post->ID ) );
7902      wp_schedule_single_event( strtotime( get_gmt_from_date( $post->post_date ) . ' GMT' ), 'publish_future_post', array( $post->ID ) );
7903  }
7904  
7905  /**
7906   * Hook to schedule pings and enclosures when a post is published.
7907   *
7908   * Uses XMLRPC_REQUEST and WP_IMPORTING constants.
7909   *
7910   * @since 2.3.0
7911   * @access private
7912   *
7913   * @param int $post_id The ID of the post being published.
7914   */
7915  function _publish_post_hook( $post_id ) {
7916      if ( defined( 'XMLRPC_REQUEST' ) ) {
7917          /**
7918           * Fires when _publish_post_hook() is called during an XML-RPC request.
7919           *
7920           * @since 2.1.0
7921           *
7922           * @param int $post_id Post ID.
7923           */
7924          do_action( 'xmlrpc_publish_post', $post_id );
7925      }
7926  
7927      if ( defined( 'WP_IMPORTING' ) ) {
7928          return;
7929      }
7930  
7931      if ( get_option( 'default_pingback_flag' ) ) {
7932          add_post_meta( $post_id, '_pingme', '1', true );
7933      }
7934      add_post_meta( $post_id, '_encloseme', '1', true );
7935  
7936      $to_ping = get_to_ping( $post_id );
7937      if ( ! empty( $to_ping ) ) {
7938          add_post_meta( $post_id, '_trackbackme', '1' );
7939      }
7940  
7941      if ( ! wp_next_scheduled( 'do_pings' ) ) {
7942          wp_schedule_single_event( time(), 'do_pings' );
7943      }
7944  }
7945  
7946  /**
7947   * Returns the ID of the post's parent.
7948   *
7949   * @since 3.1.0
7950   * @since 5.9.0 The `$post` parameter was made optional.
7951   *
7952   * @param int|WP_Post|null $post Optional. Post ID or post object. Defaults to global $post.
7953   * @return int|false Post parent ID (which can be 0 if there is no parent),
7954   *                   or false if the post does not exist.
7955   */
7956  function wp_get_post_parent_id( $post = null ) {
7957      $post = get_post( $post );
7958  
7959      if ( ! $post || is_wp_error( $post ) ) {
7960          return false;
7961      }
7962  
7963      return (int) $post->post_parent;
7964  }
7965  
7966  /**
7967   * Checks the given subset of the post hierarchy for hierarchy loops.
7968   *
7969   * Prevents loops from forming and breaks those that it finds. Attached
7970   * to the {@see 'wp_insert_post_parent'} filter.
7971   *
7972   * @since 3.1.0
7973   *
7974   * @see wp_find_hierarchy_loop()
7975   *
7976   * @param int $post_parent ID of the parent for the post we're checking.
7977   * @param int $post_id     ID of the post we're checking.
7978   * @return int The new post_parent for the post, 0 otherwise.
7979   */
7980  function wp_check_post_hierarchy_for_loops( $post_parent, $post_id ) {
7981      // Nothing fancy here - bail.
7982      if ( ! $post_parent ) {
7983          return 0;
7984      }
7985  
7986      // New post can't cause a loop.
7987      if ( ! $post_id ) {
7988          return $post_parent;
7989      }
7990  
7991      // Can't be its own parent.
7992      if ( $post_parent === $post_id ) {
7993          return 0;
7994      }
7995  
7996      // Now look for larger loops.
7997      $loop = wp_find_hierarchy_loop( 'wp_get_post_parent_id', $post_id, $post_parent );
7998      if ( ! $loop ) {
7999          return $post_parent; // No loop.
8000      }
8001  
8002      // Setting $post_parent to the given value causes a loop.
8003      if ( isset( $loop[ $post_id ] ) ) {
8004          return 0;
8005      }
8006  
8007      // There's a loop, but it doesn't contain $post_id. Break the loop.
8008      foreach ( array_keys( $loop ) as $loop_member ) {
8009          wp_update_post(
8010              array(
8011                  'ID'          => $loop_member,
8012                  'post_parent' => 0,
8013              )
8014          );
8015      }
8016  
8017      return $post_parent;
8018  }
8019  
8020  /**
8021   * Sets the post thumbnail (featured image) for the given post.
8022   *
8023   * @since 3.1.0
8024   *
8025   * @param int|WP_Post $post         Post ID or post object where thumbnail should be attached.
8026   * @param int         $thumbnail_id Thumbnail to attach.
8027   * @return int|bool Post meta ID if the key didn't exist (ie. this is the first time that
8028   *                  a thumbnail has been saved for the post), true on successful update,
8029   *                  false on failure or if the value passed is the same as the one that
8030   *                  is already in the database.
8031   */
8032  function set_post_thumbnail( $post, $thumbnail_id ) {
8033      $post         = get_post( $post );
8034      $thumbnail_id = absint( $thumbnail_id );
8035      if ( $post && $thumbnail_id && get_post( $thumbnail_id ) ) {
8036          if ( wp_get_attachment_image( $thumbnail_id, 'thumbnail' ) ) {
8037              return update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
8038          } else {
8039              return delete_post_meta( $post->ID, '_thumbnail_id' );
8040          }
8041      }
8042      return false;
8043  }
8044  
8045  /**
8046   * Removes the thumbnail (featured image) from the given post.
8047   *
8048   * @since 3.3.0
8049   *
8050   * @param int|WP_Post $post Post ID or post object from which the thumbnail should be removed.
8051   * @return bool True on success, false on failure.
8052   */
8053  function delete_post_thumbnail( $post ) {
8054      $post = get_post( $post );
8055      if ( $post ) {
8056          return delete_post_meta( $post->ID, '_thumbnail_id' );
8057      }
8058      return false;
8059  }
8060  
8061  /**
8062   * Deletes auto-drafts for new posts that are > 7 days old.
8063   *
8064   * @since 3.4.0
8065   *
8066   * @global wpdb $wpdb WordPress database abstraction object.
8067   */
8068  function wp_delete_auto_drafts() {
8069      global $wpdb;
8070  
8071      // Cleanup old auto-drafts more than 7 days old.
8072      $old_posts = $wpdb->get_col( "SELECT ID FROM $wpdb->posts WHERE post_status = 'auto-draft' AND DATE_SUB( NOW(), INTERVAL 7 DAY ) > post_date" );
8073      foreach ( (array) $old_posts as $delete ) {
8074          // Force delete.
8075          wp_delete_post( $delete, true );
8076      }
8077  }
8078  
8079  /**
8080   * Queues posts for lazy-loading of term meta.
8081   *
8082   * @since 4.5.0
8083   *
8084   * @param WP_Post[] $posts Array of WP_Post objects.
8085   */
8086  function wp_queue_posts_for_term_meta_lazyload( $posts ) {
8087      $post_type_taxonomies = array();
8088      $prime_post_terms     = array();
8089      foreach ( $posts as $post ) {
8090          if ( ! ( $post instanceof WP_Post ) ) {
8091              continue;
8092          }
8093  
8094          if ( ! isset( $post_type_taxonomies[ $post->post_type ] ) ) {
8095              $post_type_taxonomies[ $post->post_type ] = get_object_taxonomies( $post->post_type );
8096          }
8097  
8098          foreach ( $post_type_taxonomies[ $post->post_type ] as $taxonomy ) {
8099              $prime_post_terms[ $taxonomy ][] = $post->ID;
8100          }
8101      }
8102  
8103      $term_ids = array();
8104      if ( $prime_post_terms ) {
8105          foreach ( $prime_post_terms as $taxonomy => $post_ids ) {
8106              $cached_term_ids = wp_cache_get_multiple( $post_ids, "{$taxonomy}_relationships" );
8107              if ( is_array( $cached_term_ids ) ) {
8108                  $cached_term_ids = array_filter( $cached_term_ids );
8109                  foreach ( $cached_term_ids as $_term_ids ) {
8110                      // Backward compatibility for if a plugin is putting objects into the cache, rather than IDs.
8111                      foreach ( $_term_ids as $term_id ) {
8112                          if ( is_numeric( $term_id ) ) {
8113                              $term_ids[] = (int) $term_id;
8114                          } elseif ( isset( $term_id->term_id ) ) {
8115                              $term_ids[] = (int) $term_id->term_id;
8116                          }
8117                      }
8118                  }
8119              }
8120          }
8121          $term_ids = array_unique( $term_ids );
8122      }
8123  
8124      wp_lazyload_term_meta( $term_ids );
8125  }
8126  
8127  /**
8128   * Updates the custom taxonomies' term counts when a post's status is changed.
8129   *
8130   * For example, default posts term counts (for custom taxonomies) don't include
8131   * private / draft posts.
8132   *
8133   * @since 3.3.0
8134   * @access private
8135   *
8136   * @param string  $new_status New post status.
8137   * @param string  $old_status Old post status.
8138   * @param WP_Post $post       Post object.
8139   */
8140  function _update_term_count_on_transition_post_status( $new_status, $old_status, $post ) {
8141      // Update counts for the post's terms.
8142      foreach ( (array) get_object_taxonomies( $post->post_type ) as $taxonomy ) {
8143          $tt_ids = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'tt_ids' ) );
8144          wp_update_term_count( $tt_ids, $taxonomy );
8145      }
8146  }
8147  
8148  /**
8149   * Adds any posts from the given IDs to the cache that do not already exist in cache.
8150   *
8151   * @since 3.4.0
8152   * @since 6.1.0 This function is no longer marked as "private".
8153   *
8154   * @see update_post_cache()
8155   * @see update_postmeta_cache()
8156   * @see update_object_term_cache()
8157   *
8158   * @global wpdb $wpdb WordPress database abstraction object.
8159   *
8160   * @param int[] $ids               ID list.
8161   * @param bool  $update_term_cache Optional. Whether to update the term cache. Default true.
8162   * @param bool  $update_meta_cache Optional. Whether to update the meta cache. Default true.
8163   */
8164  function _prime_post_caches( $ids, $update_term_cache = true, $update_meta_cache = true ) {
8165      global $wpdb;
8166  
8167      $non_cached_ids = _get_non_cached_ids( $ids, 'posts' );
8168      if ( ! empty( $non_cached_ids ) ) {
8169          $fresh_posts = $wpdb->get_results( sprintf( "SELECT $wpdb->posts.* FROM $wpdb->posts WHERE ID IN (%s)", implode( ',', $non_cached_ids ) ) );
8170  
8171          if ( $fresh_posts ) {
8172              // Despite the name, update_post_cache() expects an array rather than a single post.
8173              update_post_cache( $fresh_posts );
8174          }
8175      }
8176  
8177      if ( $update_meta_cache ) {
8178          update_postmeta_cache( $ids );
8179      }
8180  
8181      if ( $update_term_cache ) {
8182          $post_types = array_map( 'get_post_type', $ids );
8183          $post_types = array_unique( $post_types );
8184          update_object_term_cache( $ids, $post_types );
8185      }
8186  }
8187  
8188  /**
8189   * Prime the cache containing the parent ID of various post objects.
8190   *
8191   * @since 6.4.0
8192   *
8193   * @global wpdb $wpdb WordPress database abstraction object.
8194   *
8195   * @param int[] $ids ID list.
8196   */
8197  function _prime_post_parent_id_caches( array $ids ) {
8198      global $wpdb;
8199  
8200      $ids = array_filter( $ids, '_validate_cache_id' );
8201      $ids = array_unique( array_map( 'intval', $ids ), SORT_NUMERIC );
8202  
8203      if ( empty( $ids ) ) {
8204          return;
8205      }
8206  
8207      $cache_keys = array();
8208      foreach ( $ids as $id ) {
8209          $cache_keys[ $id ] = 'post_parent:' . (string) $id;
8210      }
8211  
8212      $cached_data = wp_cache_get_multiple( array_values( $cache_keys ), 'posts' );
8213  
8214      $non_cached_ids = array();
8215      foreach ( $cache_keys as $id => $cache_key ) {
8216          if ( false === $cached_data[ $cache_key ] ) {
8217              $non_cached_ids[] = $id;
8218          }
8219      }
8220  
8221      if ( ! empty( $non_cached_ids ) ) {
8222          $fresh_posts = $wpdb->get_results( sprintf( "SELECT $wpdb->posts.ID, $wpdb->posts.post_parent FROM $wpdb->posts WHERE ID IN (%s)", implode( ',', $non_cached_ids ) ) );
8223  
8224          if ( $fresh_posts ) {
8225              $post_parent_data = array();
8226              foreach ( $fresh_posts as $fresh_post ) {
8227                  $post_parent_data[ 'post_parent:' . (string) $fresh_post->ID ] = (int) $fresh_post->post_parent;
8228              }
8229  
8230              wp_cache_add_multiple( $post_parent_data, 'posts' );
8231          }
8232      }
8233  }
8234  
8235  /**
8236   * Adds a suffix if any trashed posts have a given slug.
8237   *
8238   * Store its desired (i.e. current) slug so it can try to reclaim it
8239   * if the post is untrashed.
8240   *
8241   * For internal use.
8242   *
8243   * @since 4.5.0
8244   * @access private
8245   *
8246   * @param string $post_name Post slug.
8247   * @param int    $post_id   Optional. Post ID that should be ignored. Default 0.
8248   */
8249  function wp_add_trashed_suffix_to_post_name_for_trashed_posts( $post_name, $post_id = 0 ) {
8250      $trashed_posts_with_desired_slug = get_posts(
8251          array(
8252              'name'         => $post_name,
8253              'post_status'  => 'trash',
8254              'post_type'    => 'any',
8255              'nopaging'     => true,
8256              'post__not_in' => array( $post_id ),
8257          )
8258      );
8259  
8260      if ( ! empty( $trashed_posts_with_desired_slug ) ) {
8261          foreach ( $trashed_posts_with_desired_slug as $_post ) {
8262              wp_add_trashed_suffix_to_post_name_for_post( $_post );
8263          }
8264      }
8265  }
8266  
8267  /**
8268   * Adds a trashed suffix for a given post.
8269   *
8270   * Store its desired (i.e. current) slug so it can try to reclaim it
8271   * if the post is untrashed.
8272   *
8273   * For internal use.
8274   *
8275   * @since 4.5.0
8276   * @access private
8277   *
8278   * @global wpdb $wpdb WordPress database abstraction object.
8279   *
8280   * @param WP_Post $post The post.
8281   * @return string New slug for the post.
8282   */
8283  function wp_add_trashed_suffix_to_post_name_for_post( $post ) {
8284      global $wpdb;
8285  
8286      $post = get_post( $post );
8287  
8288      if ( str_ends_with( $post->post_name, '__trashed' ) ) {
8289          return $post->post_name;
8290      }
8291      add_post_meta( $post->ID, '_wp_desired_post_slug', $post->post_name );
8292      $post_name = _truncate_post_slug( $post->post_name, 191 ) . '__trashed';
8293      $wpdb->update( $wpdb->posts, array( 'post_name' => $post_name ), array( 'ID' => $post->ID ) );
8294      clean_post_cache( $post->ID );
8295      return $post_name;
8296  }
8297  
8298  /**
8299   * Sets the last changed time for the 'posts' cache group.
8300   *
8301   * @since 5.0.0
8302   */
8303  function wp_cache_set_posts_last_changed() {
8304      wp_cache_set_last_changed( 'posts' );
8305  }
8306  
8307  /**
8308   * Gets all available post MIME types for a given post type.
8309   *
8310   * @since 2.5.0
8311   *
8312   * @global wpdb $wpdb WordPress database abstraction object.
8313   *
8314   * @param string $type
8315   * @return string[] An array of MIME types.
8316   */
8317  function get_available_post_mime_types( $type = 'attachment' ) {
8318      global $wpdb;
8319  
8320      /**
8321       * Filters the list of available post MIME types for the given post type.
8322       *
8323       * @since 6.4.0
8324       *
8325       * @param string[]|null $mime_types An array of MIME types. Default null.
8326       * @param string        $type       The post type name. Usually 'attachment' but can be any post type.
8327       */
8328      $mime_types = apply_filters( 'pre_get_available_post_mime_types', null, $type );
8329  
8330      if ( ! is_array( $mime_types ) ) {
8331          $mime_types = $wpdb->get_col( $wpdb->prepare( "SELECT DISTINCT post_mime_type FROM $wpdb->posts WHERE post_type = %s AND post_mime_type != ''", $type ) );
8332      }
8333  
8334      // Remove nulls from returned $mime_types.
8335      return array_values( array_filter( $mime_types ) );
8336  }
8337  
8338  /**
8339   * Retrieves the path to an uploaded image file.
8340   *
8341   * Similar to `get_attached_file()` however some images may have been processed after uploading
8342   * to make them suitable for web use. In this case the attached "full" size file is usually replaced
8343   * with a scaled down version of the original image. This function always returns the path
8344   * to the originally uploaded image file.
8345   *
8346   * @since 5.3.0
8347   * @since 5.4.0 Added the `$unfiltered` parameter.
8348   *
8349   * @param int  $attachment_id Attachment ID.
8350   * @param bool $unfiltered Optional. Passed through to `get_attached_file()`. Default false.
8351   * @return string|false Path to the original image file or false if the attachment is not an image.
8352   */
8353  function wp_get_original_image_path( $attachment_id, $unfiltered = false ) {
8354      if ( ! wp_attachment_is_image( $attachment_id ) ) {
8355          return false;
8356      }
8357  
8358      $image_meta = wp_get_attachment_metadata( $attachment_id );
8359      $image_file = get_attached_file( $attachment_id, $unfiltered );
8360  
8361      if ( empty( $image_meta['original_image'] ) ) {
8362          $original_image = $image_file;
8363      } else {
8364          $original_image = path_join( dirname( $image_file ), $image_meta['original_image'] );
8365      }
8366  
8367      /**
8368       * Filters the path to the original image.
8369       *
8370       * @since 5.3.0
8371       *
8372       * @param string $original_image Path to original image file.
8373       * @param int    $attachment_id  Attachment ID.
8374       */
8375      return apply_filters( 'wp_get_original_image_path', $original_image, $attachment_id );
8376  }
8377  
8378  /**
8379   * Retrieves the URL to an original attachment image.
8380   *
8381   * Similar to `wp_get_attachment_url()` however some images may have been
8382   * processed after uploading. In this case this function returns the URL
8383   * to the originally uploaded image file.
8384   *
8385   * @since 5.3.0
8386   *
8387   * @param int $attachment_id Attachment post ID.
8388   * @return string|false Attachment image URL, false on error or if the attachment is not an image.
8389   */
8390  function wp_get_original_image_url( $attachment_id ) {
8391      if ( ! wp_attachment_is_image( $attachment_id ) ) {
8392          return false;
8393      }
8394  
8395      $image_url = wp_get_attachment_url( $attachment_id );
8396  
8397      if ( ! $image_url ) {
8398          return false;
8399      }
8400  
8401      $image_meta = wp_get_attachment_metadata( $attachment_id );
8402  
8403      if ( empty( $image_meta['original_image'] ) ) {
8404          $original_image_url = $image_url;
8405      } else {
8406          $original_image_url = path_join( dirname( $image_url ), $image_meta['original_image'] );
8407      }
8408  
8409      /**
8410       * Filters the URL to the original attachment image.
8411       *
8412       * @since 5.3.0
8413       *
8414       * @param string $original_image_url URL to original image.
8415       * @param int    $attachment_id      Attachment ID.
8416       */
8417      return apply_filters( 'wp_get_original_image_url', $original_image_url, $attachment_id );
8418  }
8419  
8420  /**
8421   * Filters callback which sets the status of an untrashed post to its previous status.
8422   *
8423   * This can be used as a callback on the `wp_untrash_post_status` filter.
8424   *
8425   * @since 5.6.0
8426   *
8427   * @param string $new_status      The new status of the post being restored.
8428   * @param int    $post_id         The ID of the post being restored.
8429   * @param string $previous_status The status of the post at the point where it was trashed.
8430   * @return string The new status of the post.
8431   */
8432  function wp_untrash_post_set_previous_status( $new_status, $post_id, $previous_status ) {
8433      return $previous_status;
8434  }
8435  
8436  /**
8437   * Returns whether the post can be edited in the block editor.
8438   *
8439   * @since 5.0.0
8440   * @since 6.1.0 Moved to wp-includes from wp-admin.
8441   *
8442   * @param int|WP_Post $post Post ID or WP_Post object.
8443   * @return bool Whether the post can be edited in the block editor.
8444   */
8445  function use_block_editor_for_post( $post ) {
8446      $post = get_post( $post );
8447  
8448      if ( ! $post ) {
8449          return false;
8450      }
8451  
8452      // We're in the meta box loader, so don't use the block editor.
8453      if ( is_admin() && isset( $_GET['meta-box-loader'] ) ) {
8454          check_admin_referer( 'meta-box-loader', 'meta-box-loader-nonce' );
8455          return false;
8456      }
8457  
8458      $use_block_editor = use_block_editor_for_post_type( $post->post_type );
8459  
8460      /**
8461       * Filters whether a post is able to be edited in the block editor.
8462       *
8463       * @since 5.0.0
8464       *
8465       * @param bool    $use_block_editor Whether the post can be edited or not.
8466       * @param WP_Post $post             The post being checked.
8467       */
8468      return apply_filters( 'use_block_editor_for_post', $use_block_editor, $post );
8469  }
8470  
8471  /**
8472   * Returns whether a post type is compatible with the block editor.
8473   *
8474   * The block editor depends on the REST API, and if the post type is not shown in the
8475   * REST API, then it won't work with the block editor.
8476   *
8477   * @since 5.0.0
8478   * @since 6.1.0 Moved to wp-includes from wp-admin.
8479   *
8480   * @param string $post_type The post type.
8481   * @return bool Whether the post type can be edited with the block editor.
8482   */
8483  function use_block_editor_for_post_type( $post_type ) {
8484      if ( ! post_type_exists( $post_type ) ) {
8485          return false;
8486      }
8487  
8488      if ( ! post_type_supports( $post_type, 'editor' ) ) {
8489          return false;
8490      }
8491  
8492      $post_type_object = get_post_type_object( $post_type );
8493      if ( $post_type_object && ! $post_type_object->show_in_rest ) {
8494          return false;
8495      }
8496  
8497      /**
8498       * Filters whether a post is able to be edited in the block editor.
8499       *
8500       * @since 5.0.0
8501       *
8502       * @param bool   $use_block_editor  Whether the post type can be edited or not. Default true.
8503       * @param string $post_type         The post type being checked.
8504       */
8505      return apply_filters( 'use_block_editor_for_post_type', true, $post_type );
8506  }
8507  
8508  /**
8509   * Registers any additional post meta fields.
8510   *
8511   * @since 6.3.0 Adds `wp_pattern_sync_status` meta field to the wp_block post type so an unsynced option can be added.
8512   *
8513   * @link https://github.com/WordPress/gutenberg/pull/51144
8514   */
8515  function wp_create_initial_post_meta() {
8516      register_post_meta(
8517          'wp_block',
8518          'wp_pattern_sync_status',
8519          array(
8520              'sanitize_callback' => 'sanitize_text_field',
8521              'single'            => true,
8522              'type'              => 'string',
8523              'show_in_rest'      => array(
8524                  'schema' => array(
8525                      'type' => 'string',
8526                      'enum' => array( 'partial', 'unsynced' ),
8527                  ),
8528              ),
8529          )
8530      );
8531  }


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