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


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