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ðŸ“ ..
ðŸ“ ID3
ðŸ“ IXR
ðŸ“ PHPMailer
ðŸ“ Requests
ðŸ“ SimplePie
ðŸ“ Text
ðŸ“„ admin-bar.php(36.24 KB)
ðŸ“ assets
ðŸ“„ atomlib.php(11.79 KB)
ðŸ“„ author-template.php(18.51 KB)
ðŸ“ block-bindings
ðŸ“„ block-bindings.php(5.46 KB)
ðŸ“„ block-editor.php(28.12 KB)
ðŸ“„ block-i18n.json(316 B)
ðŸ“ block-patterns
ðŸ“„ block-patterns.php(12.9 KB)
ðŸ“ block-supports
ðŸ“„ block-template-utils.php(60.46 KB)
ðŸ“„ block-template.php(15 KB)
ðŸ“ blocks
ðŸ“„ blocks.php(109.11 KB)
ðŸ“„ bookmark-template.php(12.47 KB)
ðŸ“„ bookmark.php(15.07 KB)
ðŸ“„ cache-compat.php(5.83 KB)
ðŸ“„ cache.php(13.16 KB)
ðŸ“„ canonical.php(33.71 KB)
ðŸ“„ capabilities.php(41.72 KB)
ðŸ“„ category-template.php(55.67 KB)
ðŸ“„ category.php(12.53 KB)
ðŸ“ certificates
ðŸ“„ class-IXR.php(2.55 KB)
ðŸ“„ class-avif-info.php(28.92 KB)
ðŸ“„ class-feed.php(539 B)
ðŸ“„ class-http.php(367 B)
ðŸ“„ class-json.php(42.66 KB)
ðŸ“„ class-oembed.php(401 B)
ðŸ“„ class-phpass.php(6.61 KB)
ðŸ“„ class-phpmailer.php(664 B)
ðŸ“„ class-pop3.php(20.63 KB)
ðŸ“„ class-requests.php(2.18 KB)
ðŸ“„ class-simplepie.php(453 B)
ðŸ“„ class-smtp.php(457 B)
ðŸ“„ class-snoopy.php(36.83 KB)
ðŸ“„ class-walker-category-dropdown.php(2.41 KB)
ðŸ“„ class-walker-category.php(8.28 KB)
ðŸ“„ class-walker-comment.php(13.89 KB)
ðŸ“„ class-walker-nav-menu.php(11.76 KB)
ðŸ“„ class-walker-page-dropdown.php(2.65 KB)
ðŸ“„ class-walker-page.php(7.43 KB)
ðŸ“„ class-wp-admin-bar.php(17.46 KB)
ðŸ“„ class-wp-ajax-response.php(5.14 KB)
ðŸ“„ class-wp-application-passwords.php(16.7 KB)
ðŸ“„ class-wp-block-bindings-registry.php(8.26 KB)
ðŸ“„ class-wp-block-bindings-source.php(2.92 KB)
ðŸ“„ class-wp-block-editor-context.php(1.32 KB)
ðŸ“„ class-wp-block-list.php(4.65 KB)
ðŸ“„ class-wp-block-metadata-registry.php(11.62 KB)
ðŸ“„ class-wp-block-parser-block.php(2.5 KB)
ðŸ“„ class-wp-block-parser-frame.php(1.97 KB)
ðŸ“„ class-wp-block-parser.php(11.26 KB)
ðŸ“„ class-wp-block-pattern-categories-registry.php(5.25 KB)
ðŸ“„ class-wp-block-patterns-registry.php(10.53 KB)
ðŸ“„ class-wp-block-styles-registry.php(6.25 KB)
ðŸ“„ class-wp-block-supports.php(5.49 KB)
ðŸ“„ class-wp-block-template.php(1.99 KB)
ðŸ“„ class-wp-block-templates-registry.php(7.06 KB)
ðŸ“„ class-wp-block-type-registry.php(4.9 KB)
ðŸ“„ class-wp-block-type.php(16.86 KB)
ðŸ“„ class-wp-block.php(22.5 KB)
ðŸ“„ class-wp-classic-to-block-menu-converter.php(3.99 KB)
ðŸ“„ class-wp-comment-query.php(47.26 KB)
ðŸ“„ class-wp-comment.php(9.22 KB)
ðŸ“„ class-wp-customize-control.php(25.25 KB)
ðŸ“„ class-wp-customize-manager.php(197.84 KB)
ðŸ“„ class-wp-customize-nav-menus.php(56.07 KB)
ðŸ“„ class-wp-customize-panel.php(10.46 KB)
ðŸ“„ class-wp-customize-section.php(10.95 KB)
ðŸ“„ class-wp-customize-setting.php(29.26 KB)
ðŸ“„ class-wp-customize-widgets.php(70.52 KB)
ðŸ“„ class-wp-date-query.php(34.89 KB)
ðŸ“„ class-wp-dependencies.php(14.78 KB)
ðŸ“„ class-wp-dependency.php(2.57 KB)
ðŸ“„ class-wp-duotone.php(39.83 KB)
ðŸ“„ class-wp-editor.php(70.64 KB)
ðŸ“„ class-wp-embed.php(15.56 KB)
ðŸ“„ class-wp-error.php(7.33 KB)
ðŸ“„ class-wp-exception.php(253 B)
ðŸ“„ class-wp-fatal-error-handler.php(7.96 KB)
ðŸ“„ class-wp-feed-cache-transient.php(3.1 KB)
ðŸ“„ class-wp-feed-cache.php(969 B)
ðŸ“„ class-wp-hook.php(15.63 KB)
ðŸ“„ class-wp-http-cookie.php(7.22 KB)
ðŸ“„ class-wp-http-curl.php(12.25 KB)
ðŸ“„ class-wp-http-encoding.php(6.53 KB)
ðŸ“„ class-wp-http-ixr-client.php(3.42 KB)
ðŸ“„ class-wp-http-proxy.php(5.84 KB)
ðŸ“„ class-wp-http-requests-hooks.php(1.97 KB)
ðŸ“„ class-wp-http-requests-response.php(4.3 KB)
ðŸ“„ class-wp-http-response.php(2.91 KB)
ðŸ“„ class-wp-http-streams.php(16.46 KB)
ðŸ“„ class-wp-http.php(40.6 KB)
ðŸ“„ class-wp-image-editor-gd.php(19.69 KB)
ðŸ“„ class-wp-image-editor-imagick.php(33.92 KB)
ðŸ“„ class-wp-image-editor.php(17.12 KB)
ðŸ“„ class-wp-list-util.php(7.27 KB)
ðŸ“„ class-wp-locale-switcher.php(6.62 KB)
ðŸ“„ class-wp-locale.php(16.49 KB)
ðŸ“„ class-wp-matchesmapregex.php(1.79 KB)
ðŸ“„ class-wp-meta-query.php(29.82 KB)
ðŸ“„ class-wp-metadata-lazyloader.php(6.67 KB)
ðŸ“„ class-wp-navigation-fallback.php(9 KB)
ðŸ“„ class-wp-network-query.php(19.39 KB)
ðŸ“„ class-wp-network.php(12.01 KB)
ðŸ“„ class-wp-object-cache.php(17.11 KB)
ðŸ“„ class-wp-oembed-controller.php(6.74 KB)
ðŸ“„ class-wp-oembed.php(30.91 KB)
ðŸ“„ class-wp-paused-extensions-storage.php(4.99 KB)
ðŸ“„ class-wp-phpmailer.php(3.71 KB)
ðŸ“„ class-wp-plugin-dependencies.php(24.72 KB)
ðŸ“„ class-wp-post-type.php(29.96 KB)
ðŸ“„ class-wp-post.php(6.34 KB)
ðŸ“„ class-wp-query.php(154.32 KB)
ðŸ“„ class-wp-recovery-mode-cookie-service.php(6.72 KB)
ðŸ“„ class-wp-recovery-mode-email-service.php(10.92 KB)
ðŸ“„ class-wp-recovery-mode-key-service.php(4.77 KB)
ðŸ“„ class-wp-recovery-mode-link-service.php(3.38 KB)
ðŸ“„ class-wp-recovery-mode.php(11.18 KB)
ðŸ“„ class-wp-rewrite.php(62.2 KB)
ðŸ“„ class-wp-role.php(2.46 KB)
ðŸ“„ class-wp-roles.php(8.38 KB)
ðŸ“„ class-wp-script-modules.php(19.01 KB)
ðŸ“„ class-wp-scripts.php(27.68 KB)
ðŸ“„ class-wp-session-tokens.php(7.15 KB)
ðŸ“„ class-wp-simplepie-file.php(3.33 KB)
ðŸ“„ class-wp-simplepie-sanitize-kses.php(1.87 KB)
ðŸ“„ class-wp-site-query.php(30.88 KB)
ðŸ“„ class-wp-site.php(7.28 KB)
ðŸ“„ class-wp-speculation-rules.php(7.35 KB)
ðŸ“„ class-wp-styles.php(10.75 KB)
ðŸ“„ class-wp-tax-query.php(19.1 KB)
ðŸ“„ class-wp-taxonomy.php(18.12 KB)
ðŸ“„ class-wp-term-query.php(39.91 KB)
ðŸ“„ class-wp-term.php(5.17 KB)
ðŸ“„ class-wp-text-diff-renderer-inline.php(979 B)
ðŸ“„ class-wp-text-diff-renderer-table.php(18.44 KB)
ðŸ“„ class-wp-textdomain-registry.php(10.24 KB)
ðŸ“„ class-wp-theme-json-data.php(1.77 KB)
ðŸ“„ class-wp-theme-json-resolver.php(34.9 KB)
ðŸ“„ class-wp-theme-json-schema.php(7.19 KB)
ðŸ“„ class-wp-theme-json.php(159.71 KB)
ðŸ“„ class-wp-theme.php(64.27 KB)
ðŸ“„ class-wp-token-map.php(27.95 KB)
ðŸ“„ class-wp-url-pattern-prefixer.php(4.69 KB)
ðŸ“„ class-wp-user-meta-session-tokens.php(2.92 KB)
ðŸ“„ class-wp-user-query.php(42.63 KB)
ðŸ“„ class-wp-user-request.php(2.25 KB)
ðŸ“„ class-wp-user.php(22.46 KB)
ðŸ“„ class-wp-walker.php(13.01 KB)
ðŸ“„ class-wp-widget-factory.php(3.27 KB)
ðŸ“„ class-wp-widget.php(18 KB)
ðŸ“„ class-wp-xmlrpc-server.php(210.39 KB)
ðŸ“„ class-wp.php(25.7 KB)
ðŸ“„ class-wpdb.php(115.51 KB)
ðŸ“„ class.wp-dependencies.php(373 B)
ðŸ“„ class.wp-scripts.php(343 B)
ðŸ“„ class.wp-styles.php(338 B)
ðŸ“„ comment-template.php(100.47 KB)
ðŸ“„ comment.php(128.46 KB)
ðŸ“„ compat.php(15.99 KB)
ðŸ“„ cron.php(41.66 KB)
ðŸ“ css
ðŸ“ customize
ðŸ“„ date.php(400 B)
ðŸ“„ default-constants.php(11.1 KB)
ðŸ“„ default-filters.php(35.84 KB)
ðŸ“„ default-widgets.php(2.24 KB)
ðŸ“„ deprecated.php(187.07 KB)
ðŸ“„ embed-template.php(338 B)
ðŸ“„ embed.php(37.28 KB)
ðŸ“„ error-protection.php(4.02 KB)
ðŸ“„ error_log(503.4 KB)
ðŸ“„ feed-atom-comments.php(5.38 KB)
ðŸ“„ feed-atom.php(3.05 KB)
ðŸ“„ feed-rdf.php(2.61 KB)
ðŸ“„ feed-rss.php(1.16 KB)
ðŸ“„ feed-rss2-comments.php(4.04 KB)
ðŸ“„ feed-rss2.php(3.71 KB)
ðŸ“„ feed.php(22.86 KB)
ðŸ“ fonts
ðŸ“„ fonts.php(9.52 KB)
ðŸ“„ formatting.php(334.24 KB)
ðŸ“„ functions.php(280.81 KB)
ðŸ“„ functions.wp-scripts.php(14.22 KB)
ðŸ“„ functions.wp-styles.php(8.38 KB)
ðŸ“„ general-template.php(168.46 KB)
ðŸ“„ global-styles-and-settings.php(20.76 KB)
ðŸ“ html-api
ðŸ“„ http.php(24.72 KB)
ðŸ“„ https-detection.php(5.72 KB)
ðŸ“„ https-migration.php(4.63 KB)
ðŸ“ images
ðŸ“ interactivity-api
ðŸ“ js
ðŸ“„ kses.php(72.73 KB)
ðŸ“ l10n
ðŸ“„ l10n.php(66.92 KB)
ðŸ“„ link-template.php(154.1 KB)
ðŸ“„ load.php(55.12 KB)
ðŸ“„ locale.php(162 B)
ðŸ“„ media-template.php(61.58 KB)
ðŸ“„ media.php(215.12 KB)
ðŸ“„ meta.php(63.71 KB)
ðŸ“„ ms-blogs.php(25.24 KB)
ðŸ“„ ms-default-constants.php(4.81 KB)
ðŸ“„ ms-default-filters.php(6.48 KB)
ðŸ“„ ms-deprecated.php(21.25 KB)
ðŸ“„ ms-files.php(2.68 KB)
ðŸ“„ ms-functions.php(89.44 KB)
ðŸ“„ ms-load.php(19.42 KB)
ðŸ“„ ms-network.php(3.69 KB)
ðŸ“„ ms-settings.php(4.1 KB)
ðŸ“„ ms-site.php(40.35 KB)
ðŸ“„ nav-menu-template.php(25.38 KB)
ðŸ“„ nav-menu.php(43.33 KB)
ðŸ“„ option.php(100.65 KB)
ðŸ“ php-compat
ðŸ“„ pluggable-deprecated.php(6.18 KB)
ðŸ“„ pluggable.php(119.82 KB)
ðŸ“„ plugin.php(34.63 KB)
ðŸ“ pomo
ðŸ“„ post-formats.php(6.94 KB)
ðŸ“„ post-template.php(67.04 KB)
ðŸ“„ post-thumbnail-template.php(10.62 KB)
ðŸ“„ post.php(284.88 KB)
ðŸ“„ query.php(36.17 KB)
ðŸ“„ registration-functions.php(200 B)
ðŸ“„ registration.php(200 B)
ðŸ“ rest-api
ðŸ“„ rest-api.php(97.91 KB)
ðŸ“„ revision.php(30.02 KB)
ðŸ“„ rewrite.php(19.08 KB)
ðŸ“„ robots-template.php(5.06 KB)
ðŸ“„ rss-functions.php(255 B)
ðŸ“„ rss.php(22.57 KB)
ðŸ“„ script-loader.php(130.14 KB)
ðŸ“„ script-modules.php(7.53 KB)
ðŸ“„ session.php(258 B)
ðŸ“„ shortcodes.php(23.49 KB)
ðŸ“ sitemaps
ðŸ“„ sitemaps.php(3.16 KB)
ðŸ“ sodium_compat
ðŸ“„ speculative-loading.php(8.36 KB)
ðŸ“„ spl-autoload-compat.php(441 B)
ðŸ“ style-engine
ðŸ“„ style-engine.php(7.39 KB)
ðŸ“„ taxonomy.php(172.1 KB)
ðŸ“„ template-canvas.php(544 B)
ðŸ“„ template-loader.php(2.94 KB)
ðŸ“„ template.php(23.59 KB)
ðŸ“ theme-compat
ðŸ“„ theme-i18n.json(1.49 KB)
ðŸ“„ theme-previews.php(2.77 KB)
ðŸ“„ theme-templates.php(6.09 KB)
ðŸ“„ theme.json(8.5 KB)
ðŸ“„ theme.php(131.16 KB)
ðŸ“„ update.php(36.62 KB)
ðŸ“„ user.php(171.7 KB)
ðŸ“„ vars.php(6.41 KB)
ðŸ“„ version.php(1.06 KB)
ðŸ“ widgets
ðŸ“„ widgets.php(69.06 KB)
ðŸ“„ wp-db.php(445 B)
ðŸ“„ wp-diff.php(799 B)

Editing: class-wp-taxonomy.php

<?php
/**
 * Taxonomy API: WP_Taxonomy class
 *
 * @package WordPress
 * @subpackage Taxonomy
 * @since 4.7.0
 */

/**
 * Core class used for interacting with taxonomies.
 *
 * @since 4.7.0
 */
#[AllowDynamicProperties]
final class WP_Taxonomy {
	/**
	 * Taxonomy key.
	 *
	 * @since 4.7.0
	 * @var string
	 */
	public $name;

/**
	 * Name of the taxonomy shown in the menu. Usually plural.
	 *
	 * @since 4.7.0
	 * @var string
	 */
	public $label;

/**
	 * Labels object for this taxonomy.
	 *
	 * If not set, tag labels are inherited for non-hierarchical types
	 * and category labels for hierarchical ones.
	 *
	 * @see get_taxonomy_labels()
	 *
	 * @since 4.7.0
	 * @var stdClass
	 */
	public $labels;

/**
	 * Default labels.
	 *
	 * @since 6.0.0
	 * @var (string|null)[][] $default_labels
	 */
	protected static $default_labels = array();

/**
	 * A short descriptive summary of what the taxonomy is for.
	 *
	 * @since 4.7.0
	 * @var string
	 */
	public $description = '';

/**
	 * Whether a taxonomy is intended for use publicly either via the admin interface or by front-end users.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $public = true;

/**
	 * Whether the taxonomy is publicly queryable.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $publicly_queryable = true;

/**
	 * Whether the taxonomy is hierarchical.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $hierarchical = false;

/**
	 * Whether to generate and allow a UI for managing terms in this taxonomy in the admin.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $show_ui = true;

/**
	 * Whether to show the taxonomy in the admin menu.
	 *
	 * If true, the taxonomy is shown as a submenu of the object type menu. If false, no menu is shown.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $show_in_menu = true;

/**
	 * Whether the taxonomy is available for selection in navigation menus.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $show_in_nav_menus = true;

/**
	 * Whether to list the taxonomy in the tag cloud widget controls.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $show_tagcloud = true;

/**
	 * Whether to show the taxonomy in the quick/bulk edit panel.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $show_in_quick_edit = true;

/**
	 * Whether to display a column for the taxonomy on its post type listing screens.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $show_admin_column = false;

/**
	 * The callback function for the meta box display.
	 *
	 * @since 4.7.0
	 * @var bool|callable
	 */
	public $meta_box_cb = null;

/**
	 * The callback function for sanitizing taxonomy data saved from a meta box.
	 *
	 * @since 5.1.0
	 * @var callable
	 */
	public $meta_box_sanitize_cb = null;

/**
	 * An array of object types this taxonomy is registered for.
	 *
	 * @since 4.7.0
	 * @var string[]
	 */
	public $object_type = null;

/**
	 * Capabilities for this taxonomy.
	 *
	 * @since 4.7.0
	 * @var stdClass
	 */
	public $cap;

/**
	 * Rewrites information for this taxonomy.
	 *
	 * @since 4.7.0
	 * @var array|false
	 */
	public $rewrite;

/**
	 * Query var string for this taxonomy.
	 *
	 * @since 4.7.0
	 * @var string|false
	 */
	public $query_var;

/**
	 * Function that will be called when the count is updated.
	 *
	 * @since 4.7.0
	 * @var callable
	 */
	public $update_count_callback;

/**
	 * Whether this taxonomy should appear in the REST API.
	 *
	 * Default false. If true, standard endpoints will be registered with
	 * respect to $rest_base and $rest_controller_class.
	 *
	 * @since 4.7.4
	 * @var bool $show_in_rest
	 */
	public $show_in_rest;

/**
	 * The base path for this taxonomy's REST API endpoints.
	 *
	 * @since 4.7.4
	 * @var string|bool $rest_base
	 */
	public $rest_base;

/**
	 * The namespace for this taxonomy's REST API endpoints.
	 *
	 * @since 5.9.0
	 * @var string|bool $rest_namespace
	 */
	public $rest_namespace;

/**
	 * The controller for this taxonomy's REST API endpoints.
	 *
	 * Custom controllers must extend WP_REST_Controller.
	 *
	 * @since 4.7.4
	 * @var string|bool $rest_controller_class
	 */
	public $rest_controller_class;

/**
	 * The controller instance for this taxonomy's REST API endpoints.
	 *
	 * Lazily computed. Should be accessed using {@see WP_Taxonomy::get_rest_controller()}.
	 *
	 * @since 5.5.0
	 * @var WP_REST_Controller $rest_controller
	 */
	public $rest_controller;

/**
	 * The default term name for this taxonomy. If you pass an array you have
	 * to set 'name' and optionally 'slug' and 'description'.
	 *
	 * @since 5.5.0
	 * @var array|string
	 */
	public $default_term;

/**
	 * Whether terms in this taxonomy should be sorted in the order they are provided to `wp_set_object_terms()`.
	 *
	 * Use this in combination with `'orderby' => 'term_order'` when fetching terms.
	 *
	 * @since 2.5.0
	 * @var bool|null
	 */
	public $sort = null;

/**
	 * Array of arguments to automatically use inside `wp_get_object_terms()` for this taxonomy.
	 *
	 * @since 2.6.0
	 * @var array|null
	 */
	public $args = null;

/**
	 * Whether it is a built-in taxonomy.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	public $_builtin;

/**
	 * Constructor.
	 *
	 * See the register_taxonomy() function for accepted arguments for `$args`.
	 *
	 * @since 4.7.0
	 *
	 * @param string       $taxonomy    Taxonomy key, must not exceed 32 characters.
	 * @param array|string $object_type Name of the object type for the taxonomy object.
	 * @param array|string $args        Optional. Array or query string of arguments for registering a taxonomy.
	 *                                  See register_taxonomy() for information on accepted arguments.
	 *                                  Default empty array.
	 */
	public function __construct( $taxonomy, $object_type, $args = array() ) {
		$this->name = $taxonomy;

$this->set_props( $object_type, $args );
	}

/**
	 * Sets taxonomy properties.
	 *
	 * See the register_taxonomy() function for accepted arguments for `$args`.
	 *
	 * @since 4.7.0
	 *
	 * @param string|string[] $object_type Name or array of names of the object types for the taxonomy.
	 * @param array|string    $args        Array or query string of arguments for registering a taxonomy.
	 */
	public function set_props( $object_type, $args ) {
		$args = wp_parse_args( $args );

/**
		 * Filters the arguments for registering a taxonomy.
		 *
		 * @since 4.4.0
		 *
		 * @param array    $args        Array of arguments for registering a taxonomy.
		 *                              See the register_taxonomy() function for accepted arguments.
		 * @param string   $taxonomy    Taxonomy key.
		 * @param string[] $object_type Array of names of object types for the taxonomy.
		 */
		$args = apply_filters( 'register_taxonomy_args', $args, $this->name, (array) $object_type );

$taxonomy = $this->name;

/**
		 * Filters the arguments for registering a specific taxonomy.
		 *
		 * The dynamic portion of the filter name, `$taxonomy`, refers to the taxonomy key.
		 *
		 * Possible hook names include:
		 *
		 *  - `register_category_taxonomy_args`
		 *  - `register_post_tag_taxonomy_args`
		 *
		 * @since 6.0.0
		 *
		 * @param array    $args        Array of arguments for registering a taxonomy.
		 *                              See the register_taxonomy() function for accepted arguments.
		 * @param string   $taxonomy    Taxonomy key.
		 * @param string[] $object_type Array of names of object types for the taxonomy.
		 */
		$args = apply_filters( "register_{$taxonomy}_taxonomy_args", $args, $this->name, (array) $object_type );

$defaults = array(
			'labels'                => array(),
			'description'           => '',
			'public'                => true,
			'publicly_queryable'    => null,
			'hierarchical'          => false,
			'show_ui'               => null,
			'show_in_menu'          => null,
			'show_in_nav_menus'     => null,
			'show_tagcloud'         => null,
			'show_in_quick_edit'    => null,
			'show_admin_column'     => false,
			'meta_box_cb'           => null,
			'meta_box_sanitize_cb'  => null,
			'capabilities'          => array(),
			'rewrite'               => true,
			'query_var'             => $this->name,
			'update_count_callback' => '',
			'show_in_rest'          => false,
			'rest_base'             => false,
			'rest_namespace'        => false,
			'rest_controller_class' => false,
			'default_term'          => null,
			'sort'                  => null,
			'args'                  => null,
			'_builtin'              => false,
		);

$args = array_merge( $defaults, $args );

// If not set, default to the setting for 'public'.
		if ( null === $args['publicly_queryable'] ) {
			$args['publicly_queryable'] = $args['public'];
		}

if ( false !== $args['query_var'] && ( is_admin() || false !== $args['publicly_queryable'] ) ) {
			if ( true === $args['query_var'] ) {
				$args['query_var'] = $this->name;
			} else {
				$args['query_var'] = sanitize_title_with_dashes( $args['query_var'] );
			}
		} else {
			// Force 'query_var' to false for non-public taxonomies.
			$args['query_var'] = false;
		}

if ( false !== $args['rewrite'] && ( is_admin() || get_option( 'permalink_structure' ) ) ) {
			$args['rewrite'] = wp_parse_args(
				$args['rewrite'],
				array(
					'with_front'   => true,
					'hierarchical' => false,
					'ep_mask'      => EP_NONE,
				)
			);

if ( empty( $args['rewrite']['slug'] ) ) {
				$args['rewrite']['slug'] = sanitize_title_with_dashes( $this->name );
			}
		}

// If not set, default to the setting for 'public'.
		if ( null === $args['show_ui'] ) {
			$args['show_ui'] = $args['public'];
		}

// If not set, default to the setting for 'show_ui'.
		if ( null === $args['show_in_menu'] || ! $args['show_ui'] ) {
			$args['show_in_menu'] = $args['show_ui'];
		}

// If not set, default to the setting for 'public'.
		if ( null === $args['show_in_nav_menus'] ) {
			$args['show_in_nav_menus'] = $args['public'];
		}

// If not set, default to the setting for 'show_ui'.
		if ( null === $args['show_tagcloud'] ) {
			$args['show_tagcloud'] = $args['show_ui'];
		}

// If not set, default to the setting for 'show_ui'.
		if ( null === $args['show_in_quick_edit'] ) {
			$args['show_in_quick_edit'] = $args['show_ui'];
		}

// If not set, default rest_namespace to wp/v2 if show_in_rest is true.
		if ( false === $args['rest_namespace'] && ! empty( $args['show_in_rest'] ) ) {
			$args['rest_namespace'] = 'wp/v2';
		}

$default_caps = array(
			'manage_terms' => 'manage_categories',
			'edit_terms'   => 'manage_categories',
			'delete_terms' => 'manage_categories',
			'assign_terms' => 'edit_posts',
		);

$args['cap'] = (object) array_merge( $default_caps, $args['capabilities'] );
		unset( $args['capabilities'] );

$args['object_type'] = array_unique( (array) $object_type );

// If not set, use the default meta box.
		if ( null === $args['meta_box_cb'] ) {
			if ( $args['hierarchical'] ) {
				$args['meta_box_cb'] = 'post_categories_meta_box';
			} else {
				$args['meta_box_cb'] = 'post_tags_meta_box';
			}
		}

$args['name'] = $this->name;

// Default meta box sanitization callback depends on the value of 'meta_box_cb'.
		if ( null === $args['meta_box_sanitize_cb'] ) {
			switch ( $args['meta_box_cb'] ) {
				case 'post_categories_meta_box':
					$args['meta_box_sanitize_cb'] = 'taxonomy_meta_box_sanitize_cb_checkboxes';
					break;

case 'post_tags_meta_box':
				default:
					$args['meta_box_sanitize_cb'] = 'taxonomy_meta_box_sanitize_cb_input';
					break;
			}
		}

// Default taxonomy term.
		if ( ! empty( $args['default_term'] ) ) {
			if ( ! is_array( $args['default_term'] ) ) {
				$args['default_term'] = array( 'name' => $args['default_term'] );
			}
			$args['default_term'] = wp_parse_args(
				$args['default_term'],
				array(
					'name'        => '',
					'slug'        => '',
					'description' => '',
				)
			);
		}

foreach ( $args as $property_name => $property_value ) {
			$this->$property_name = $property_value;
		}

$this->labels = get_taxonomy_labels( $this );
		$this->label  = $this->labels->name;
	}

/**
	 * Adds the necessary rewrite rules for the taxonomy.
	 *
	 * @since 4.7.0
	 *
	 * @global WP $wp Current WordPress environment instance.
	 */
	public function add_rewrite_rules() {
		/* @var WP $wp */
		global $wp;

// Non-publicly queryable taxonomies should not register query vars, except in the admin.
		if ( false !== $this->query_var && $wp ) {
			$wp->add_query_var( $this->query_var );
		}

if ( false !== $this->rewrite && ( is_admin() || get_option( 'permalink_structure' ) ) ) {
			if ( $this->hierarchical && $this->rewrite['hierarchical'] ) {
				$tag = '(.+?)';
			} else {
				$tag = '([^/]+)';
			}

add_rewrite_tag( "%$this->name%", $tag, $this->query_var ? "{$this->query_var}=" : "taxonomy=$this->name&term=" );
			add_permastruct( $this->name, "{$this->rewrite['slug']}/%$this->name%", $this->rewrite );
		}
	}

/**
	 * Removes any rewrite rules, permastructs, and rules for the taxonomy.
	 *
	 * @since 4.7.0
	 *
	 * @global WP $wp Current WordPress environment instance.
	 */
	public function remove_rewrite_rules() {
		/* @var WP $wp */
		global $wp;

// Remove query var.
		if ( false !== $this->query_var ) {
			$wp->remove_query_var( $this->query_var );
		}

// Remove rewrite tags and permastructs.
		if ( false !== $this->rewrite ) {
			remove_rewrite_tag( "%$this->name%" );
			remove_permastruct( $this->name );
		}
	}

/**
	 * Registers the ajax callback for the meta box.
	 *
	 * @since 4.7.0
	 */
	public function add_hooks() {
		add_filter( 'wp_ajax_add-' . $this->name, '_wp_ajax_add_hierarchical_term' );
	}

/**
	 * Removes the ajax callback for the meta box.
	 *
	 * @since 4.7.0
	 */
	public function remove_hooks() {
		remove_filter( 'wp_ajax_add-' . $this->name, '_wp_ajax_add_hierarchical_term' );
	}

/**
	 * Gets the REST API controller for this taxonomy.
	 *
	 * Will only instantiate the controller class once per request.
	 *
	 * @since 5.5.0
	 *
	 * @return WP_REST_Controller|null The controller instance, or null if the taxonomy
	 *                                 is set not to show in rest.
	 */
	public function get_rest_controller() {
		if ( ! $this->show_in_rest ) {
			return null;
		}

$class = $this->rest_controller_class ? $this->rest_controller_class : WP_REST_Terms_Controller::class;

if ( ! class_exists( $class ) ) {
			return null;
		}

if ( ! is_subclass_of( $class, WP_REST_Controller::class ) ) {
			return null;
		}

if ( ! $this->rest_controller ) {
			$this->rest_controller = new $class( $this->name );
		}

if ( ! ( $this->rest_controller instanceof $class ) ) {
			return null;
		}

return $this->rest_controller;
	}

/**
	 * Returns the default labels for taxonomies.
	 *
	 * @since 6.0.0
	 *
	 * @return (string|null)[][] The default labels for taxonomies.
	 */
	public static function get_default_labels() {
		if ( ! empty( self::$default_labels ) ) {
			return self::$default_labels;
		}

$name_field_description   = __( 'The name is how it appears on your site.' );
		$slug_field_description   = __( 'The &#8220;slug&#8221; is the URL-friendly version of the name. It is usually all lowercase and contains only letters, numbers, and hyphens.' );
		$parent_field_description = __( 'Assign a parent term to create a hierarchy. The term Jazz, for example, would be the parent of Bebop and Big Band.' );
		$desc_field_description   = __( 'The description is not prominent by default; however, some themes may show it.' );

self::$default_labels = array(
			'name'                       => array( _x( 'Tags', 'taxonomy general name' ), _x( 'Categories', 'taxonomy general name' ) ),
			'singular_name'              => array( _x( 'Tag', 'taxonomy singular name' ), _x( 'Category', 'taxonomy singular name' ) ),
			'search_items'               => array( __( 'Search Tags' ), __( 'Search Categories' ) ),
			'popular_items'              => array( __( 'Popular Tags' ), null ),
			'all_items'                  => array( __( 'All Tags' ), __( 'All Categories' ) ),
			'parent_item'                => array( null, __( 'Parent Category' ) ),
			'parent_item_colon'          => array( null, __( 'Parent Category:' ) ),
			'name_field_description'     => array( $name_field_description, $name_field_description ),
			'slug_field_description'     => array( $slug_field_description, $slug_field_description ),
			'parent_field_description'   => array( null, $parent_field_description ),
			'desc_field_description'     => array( $desc_field_description, $desc_field_description ),
			'edit_item'                  => array( __( 'Edit Tag' ), __( 'Edit Category' ) ),
			'view_item'                  => array( __( 'View Tag' ), __( 'View Category' ) ),
			'update_item'                => array( __( 'Update Tag' ), __( 'Update Category' ) ),
			'add_new_item'               => array( __( 'Add Tag' ), __( 'Add Category' ) ),
			'new_item_name'              => array( __( 'New Tag Name' ), __( 'New Category Name' ) ),
			'separate_items_with_commas' => array( __( 'Separate tags with commas' ), null ),
			'add_or_remove_items'        => array( __( 'Add or remove tags' ), null ),
			'choose_from_most_used'      => array( __( 'Choose from the most used tags' ), null ),
			'not_found'                  => array( __( 'No tags found.' ), __( 'No categories found.' ) ),
			'no_terms'                   => array( __( 'No tags' ), __( 'No categories' ) ),
			'filter_by_item'             => array( null, __( 'Filter by category' ) ),
			'items_list_navigation'      => array( __( 'Tags list navigation' ), __( 'Categories list navigation' ) ),
			'items_list'                 => array( __( 'Tags list' ), __( 'Categories list' ) ),
			/* translators: Tab heading when selecting from the most used terms. */
			'most_used'                  => array( _x( 'Most Used', 'tags' ), _x( 'Most Used', 'categories' ) ),
			'back_to_items'              => array( __( '&larr; Go to Tags' ), __( '&larr; Go to Categories' ) ),
			'item_link'                  => array(
				_x( 'Tag Link', 'navigation link block title' ),
				_x( 'Category Link', 'navigation link block title' ),
			),
			'item_link_description'      => array(
				_x( 'A link to a tag.', 'navigation link block description' ),
				_x( 'A link to a category.', 'navigation link block description' ),
			),
		);

return self::$default_labels;
	}

/**
	 * Resets the cache for the default labels.
	 *
	 * @since 6.0.0
	 */
	public static function reset_default_labels() {
		self::$default_labels = array();
	}
}

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