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


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