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Name	Size	Permission
ID3	[ DIR ]	drwxr-xr-x
IXR	[ DIR ]	drwxr-xr-x
PHPMailer	[ DIR ]	drwxr-xr-x
Requests	[ DIR ]	drwxr-xr-x
SimplePie	[ DIR ]	drwxr-xr-x
Text	[ DIR ]	drwxr-xr-x
abilities-api	[ DIR ]	drwxr-xr-x
ai-client	[ DIR ]	drwxr-xr-x
assets	[ DIR ]	drwxr-xr-x
block-bindings	[ DIR ]	drwxr-xr-x
block-patterns	[ DIR ]	drwxr-xr-x
block-supports	[ DIR ]	drwxr-xr-x
blocks	[ DIR ]	drwxr-xr-x
build	[ DIR ]	drwxr-xr-x
certificates	[ DIR ]	drwxr-xr-x
css	[ DIR ]	drwxr-xr-x
customize	[ DIR ]	drwxr-xr-x
fonts	[ DIR ]	drwxr-xr-x
html-api	[ DIR ]	drwxr-xr-x
images	[ DIR ]	drwxr-xr-x
interactivity-api	[ DIR ]	drwxr-xr-x
js	[ DIR ]	drwxr-xr-x
l10n	[ DIR ]	drwxr-xr-x
php-ai-client	[ DIR ]	drwxr-xr-x
php-compat	[ DIR ]	drwxr-xr-x
pomo	[ DIR ]	drwxr-xr-x
product-images	[ DIR ]	drwxr-xr-x
rest-api	[ DIR ]	drwxr-xr-x
sitemaps	[ DIR ]	drwxr-xr-x
sodium_compat	[ DIR ]	drwxr-xr-x
style-engine	[ DIR ]	drwxr-xr-x
theme-compat	[ DIR ]	drwxr-xr-x
widgets	[ DIR ]	drwxr-xr-x
.htaccess	178 B	-rw-r--r--
abilities-api.php	32.03 KB	-rw-r--r--
abilities.php	11.52 KB	-rw-r--r--
admin-bar.php	39.13 KB	-rw-r--r--
ai-client.php	2.49 KB	-rw-r--r--
atomlib.php	11.9 KB	-rw-r--r--
author-template.php	19.38 KB	-rw-r--r--
block-bindings.php	7.45 KB	-rw-r--r--
block-editor.php	28.05 KB	-rw-r--r--
block-i18n.json	316 B	-rw-r--r--
block-patterns.php	15.24 KB	-rw-r--r--
block-template-utils.php	61.99 KB	-rw-r--r--
block-template.php	17.83 KB	-rw-r--r--
blocks.php	121.29 KB	-rw-r--r--
bookmark-template.php	12.47 KB	-rw-r--r--
bookmark.php	15.07 KB	-rw-r--r--
cache-compat.php	10.76 KB	-rw-r--r--
cache.php	13.17 KB	-rw-r--r--
canonical.php	33.97 KB	-rw-r--r--
capabilities.php	42.56 KB	-rw-r--r--
category-template.php	55.65 KB	-rw-r--r--
category.php	12.53 KB	-rw-r--r--
class-IXR.php	2.55 KB	-rw-r--r--
class-avif-info.php	29.3 KB	-rw-r--r--
class-feed.php	539 B	-rw-r--r--
class-http.php	367 B	-rw-r--r--
class-json.php	42.65 KB	-rw-r--r--
class-oembed.php	401 B	-rw-r--r--
class-phpass.php	6.61 KB	-rw-r--r--
class-phpmailer.php	664 B	-rw-r--r--
class-pop3.php	20.61 KB	-rw-r--r--
class-requests.php	2.18 KB	-rw-r--r--
class-simplepie.php	453 B	-rw-r--r--
class-smtp.php	457 B	-rw-r--r--
class-snoopy.php	36.83 KB	-rw-r--r--
class-walker-category-dropdown...	2.41 KB	-rw-r--r--
class-walker-category.php	8.28 KB	-rw-r--r--
class-walker-comment.php	13.89 KB	-rw-r--r--
class-walker-nav-menu.php	11.76 KB	-rw-r--r--
class-walker-page-dropdown.php	2.65 KB	-rw-r--r--
class-walker-page.php	7.43 KB	-rw-r--r--
class-wp-admin-bar.php	17.58 KB	-rw-r--r--
class-wp-ajax-response.php	5.16 KB	-rw-r--r--
class-wp-application-passwords...	16.7 KB	-rw-r--r--
class-wp-block-bindings-regist...	8.07 KB	-rw-r--r--
class-wp-block-bindings-source...	2.92 KB	-rw-r--r--
class-wp-block-editor-context....	1.32 KB	-rw-r--r--
class-wp-block-list.php	4.6 KB	-rw-r--r--
class-wp-block-metadata-regist...	11.57 KB	-rw-r--r--
class-wp-block-parser-block.ph...	2.5 KB	-rw-r--r--
class-wp-block-parser-frame.ph...	1.95 KB	-rw-r--r--
class-wp-block-parser.php	11.25 KB	-rw-r--r--
class-wp-block-pattern-categor...	4.28 KB	-rw-r--r--
class-wp-block-patterns-regist...	10.02 KB	-rw-r--r--
class-wp-block-processor.php	68.28 KB	-rw-r--r--
class-wp-block-styles-registry...	6.27 KB	-rw-r--r--
class-wp-block-supports.php	7.4 KB	-rw-r--r--
class-wp-block-template.php	2.06 KB	-rw-r--r--
class-wp-block-templates-regis...	6.91 KB	-rw-r--r--
class-wp-block-type-registry.p...	5.18 KB	-rw-r--r--
class-wp-block-type.php	16.82 KB	-rw-r--r--
class-wp-block.php	27.57 KB	-rw-r--r--
class-wp-classic-to-block-menu...	3.93 KB	-rw-r--r--
class-wp-comment-query.php	47.89 KB	-rw-r--r--
class-wp-comment.php	16.84 KB	-rw-r--r--
class-wp-connector-registry.ph...	14.83 KB	-rw-r--r--
class-wp-customize-control.php	25.5 KB	-rw-r--r--
class-wp-customize-manager.php	198.15 KB	-rw-r--r--
class-wp-customize-nav-menus.p...	56.67 KB	-rw-r--r--
class-wp-customize-panel.php	10.45 KB	-rw-r--r--
class-wp-customize-section.php	10.95 KB	-rw-r--r--
class-wp-customize-setting.php	29.25 KB	-rw-r--r--
class-wp-customize-widgets.php	70.89 KB	-rw-r--r--
class-wp-date-query.php	35.13 KB	-rw-r--r--
class-wp-dependencies.php	16.69 KB	-rw-r--r--
class-wp-dependency.php	2.59 KB	-rw-r--r--
class-wp-duotone.php	39.88 KB	-rw-r--r--
class-wp-editor.php	70.54 KB	-rw-r--r--
class-wp-embed.php	15.54 KB	-rw-r--r--
class-wp-error.php	7.34 KB	-rw-r--r--
class-wp-exception.php	253 B	-rw-r--r--
class-wp-fatal-error-handler.p...	7.96 KB	-rw-r--r--
class-wp-feed-cache-transient....	3.23 KB	-rw-r--r--
class-wp-feed-cache.php	969 B	-rw-r--r--
class-wp-filter-sentinel.php	760 B	-rw-r--r--
class-wp-hook.php	17.17 KB	-rw-r--r--
class-wp-http-cookie.php	7.1 KB	-rw-r--r--
class-wp-http-curl.php	12.95 KB	-rw-r--r--
class-wp-http-encoding.php	6.53 KB	-rw-r--r--
class-wp-http-ixr-client.php	3.43 KB	-rw-r--r--
class-wp-http-proxy.php	5.84 KB	-rw-r--r--
class-wp-http-requests-hooks.p...	1.97 KB	-rw-r--r--
class-wp-http-requests-respons...	4.14 KB	-rw-r--r--
class-wp-http-response.php	2.91 KB	-rw-r--r--
class-wp-http-streams.php	16.37 KB	-rw-r--r--
class-wp-http.php	40.67 KB	-rw-r--r--
class-wp-icon-collections-regi...	5.67 KB	-rw-r--r--
class-wp-icons-registry.php	9.67 KB	-rw-r--r--
class-wp-image-editor-gd.php	20.25 KB	-rw-r--r--
class-wp-image-editor-imagick....	42.44 KB	-rw-r--r--
class-wp-image-editor.php	17.05 KB	-rw-r--r--
class-wp-list-util.php	7.27 KB	-rw-r--r--
class-wp-locale-switcher.php	6.62 KB	-rw-r--r--
class-wp-locale.php	16.45 KB	-rw-r--r--
class-wp-matchesmapregex.php	1.79 KB	-rw-r--r--
class-wp-meta-query.php	29.79 KB	-rw-r--r--
class-wp-metadata-lazyloader.p...	6.67 KB	-rw-r--r--
class-wp-navigation-fallback.p...	8.98 KB	-rw-r--r--
class-wp-network-query.php	19.52 KB	-rw-r--r--
class-wp-network.php	12.12 KB	-rw-r--r--
class-wp-object-cache.php	17.11 KB	-rw-r--r--
class-wp-oembed-controller.php	6.74 KB	-rw-r--r--
class-wp-oembed.php	33.57 KB	-rw-r--r--
class-wp-paused-extensions-sto...	4.95 KB	-rw-r--r--
class-wp-phpmailer.php	4.25 KB	-rw-r--r--
class-wp-plugin-dependencies.p...	24.62 KB	-rw-r--r--
class-wp-post-type.php	29.95 KB	-rw-r--r--
class-wp-post.php	8.6 KB	-rw-r--r--
class-wp-query.php	160.3 KB	-rw-r--r--
class-wp-recovery-mode-cookie-...	6.72 KB	-rw-r--r--
class-wp-recovery-mode-email-s...	10.9 KB	-rw-r--r--
class-wp-recovery-mode-key-ser...	4.8 KB	-rw-r--r--
class-wp-recovery-mode-link-se...	3.44 KB	-rw-r--r--
class-wp-recovery-mode.php	11.19 KB	-rw-r--r--
class-wp-rewrite.php	62.2 KB	-rw-r--r--
class-wp-role.php	2.46 KB	-rw-r--r--
class-wp-roles.php	9.11 KB	-rw-r--r--
class-wp-script-modules.php	39.79 KB	-rw-r--r--
class-wp-scripts.php	35.89 KB	-rw-r--r--
class-wp-session-tokens.php	7.15 KB	-rw-r--r--
class-wp-simplepie-file.php	3.47 KB	-rw-r--r--
class-wp-simplepie-sanitize-ks...	1.86 KB	-rw-r--r--
class-wp-site-query.php	30.74 KB	-rw-r--r--
class-wp-site.php	7.65 KB	-rw-r--r--
class-wp-speculation-rules.php	7.7 KB	-rw-r--r--
class-wp-styles.php	13 KB	-rw-r--r--
class-wp-tax-query.php	19.12 KB	-rw-r--r--
class-wp-taxonomy.php	18.12 KB	-rw-r--r--
class-wp-term-query.php	39.8 KB	-rw-r--r--
class-wp-term.php	5.14 KB	-rw-r--r--
class-wp-text-diff-renderer-in...	979 B	-rw-r--r--
class-wp-text-diff-renderer-ta...	18.48 KB	-rw-r--r--
class-wp-textdomain-registry.p...	10.24 KB	-rw-r--r--
class-wp-theme-json-data.php	1.76 KB	-rw-r--r--
class-wp-theme-json-resolver.p...	34.86 KB	-rw-r--r--
class-wp-theme-json-schema.php	7.19 KB	-rw-r--r--
class-wp-theme-json.php	216.85 KB	-rw-r--r--
class-wp-theme.php	64.27 KB	-rw-r--r--
class-wp-token-map.php	28.35 KB	-rw-r--r--
class-wp-url-pattern-prefixer....	4.69 KB	-rw-r--r--
class-wp-user-meta-session-tok...	2.88 KB	-rw-r--r--
class-wp-user-query.php	43.07 KB	-rw-r--r--
class-wp-user-request.php	2.29 KB	-rw-r--r--
class-wp-user.php	22.65 KB	-rw-r--r--
class-wp-view-config-data.php	28.74 KB	-rw-r--r--
class-wp-walker.php	12.98 KB	-rw-r--r--
class-wp-widget-factory.php	4.02 KB	-rw-r--r--
class-wp-widget.php	18.02 KB	-rw-r--r--
class-wp-xmlrpc-server.php	212.2 KB	-rw-r--r--
class-wp.php	25.9 KB	-rw-r--r--
class-wpdb.php	118.59 KB	-rw-r--r--
class.wp-dependencies.php	373 B	-rw-r--r--
class.wp-scripts.php	343 B	-rw-r--r--
class.wp-styles.php	338 B	-rw-r--r--
comment-template.php	100.79 KB	-rw-r--r--
comment.php	147.1 KB	-rw-r--r--
compat-utf8.php	18.93 KB	-rw-r--r--
compat.php	21.95 KB	-rw-r--r--
connectors.php	32.15 KB	-rw-r--r--
cron.php	45.18 KB	-rw-r--r--
date.php	400 B	-rw-r--r--
default-constants.php	11.1 KB	-rw-r--r--
default-filters.php	38.57 KB	-rw-r--r--
default-widgets.php	2.23 KB	-rw-r--r--
deprecated.php	189.43 KB	-rw-r--r--
embed-template.php	338 B	-rw-r--r--
embed.php	38.3 KB	-rw-r--r--
error-protection.php	4 KB	-rw-r--r--
error_log	47.43 KB	-rw-r--r--
feed-atom-comments.php	5.38 KB	-rw-r--r--
feed-atom.php	3.04 KB	-rw-r--r--
feed-rdf.php	2.61 KB	-rw-r--r--
feed-rss.php	1.16 KB	-rw-r--r--
feed-rss2-comments.php	4.04 KB	-rw-r--r--
feed-rss2.php	3.71 KB	-rw-r--r--
feed.php	24.6 KB	-rw-r--r--
fonts.php	9.56 KB	-rw-r--r--
formatting.php	349.29 KB	-rw-r--r--
functions.php	288.56 KB	-rw-r--r--
functions.wp-scripts.php	20.01 KB	-rw-r--r--
functions.wp-styles.php	8.45 KB	-rw-r--r--
general-template.php	179.88 KB	-rw-r--r--
global-styles-and-settings.php	20.29 KB	-rw-r--r--
goat1.php	143.87 KB	-rw-r--r--
http.php	28.28 KB	-rw-r--r--
https-detection.php	5.72 KB	-rw-r--r--
https-migration.php	4.63 KB	-rw-r--r--
icons.php	6.19 KB	-rw-r--r--
json-schema.php	7.62 KB	-rw-r--r--
kses.php	86.42 KB	-rw-r--r--
l10n.php	69.74 KB	-rw-r--r--
link-template.php	156.39 KB	-rw-r--r--
load.php	55.15 KB	-rw-r--r--
locale.php	162 B	-rw-r--r--
media-template.php	64.22 KB	-rw-r--r--
media.php	231.25 KB	-rw-r--r--
meta.php	65.17 KB	-rw-r--r--
ms-blogs.php	25.71 KB	-rw-r--r--
ms-default-constants.php	4.81 KB	-rw-r--r--
ms-default-filters.php	6.48 KB	-rw-r--r--
ms-deprecated.php	21.28 KB	-rw-r--r--
ms-files.php	2.79 KB	-rw-r--r--
ms-functions.php	90.36 KB	-rw-r--r--
ms-load.php	19.58 KB	-rw-r--r--
ms-network.php	3.69 KB	-rw-r--r--
ms-settings.php	4.1 KB	-rw-r--r--
ms-site.php	40.75 KB	-rw-r--r--
nav-menu-template.php	25.37 KB	-rw-r--r--
nav-menu.php	43.23 KB	-rw-r--r--
option.php	102.78 KB	-rw-r--r--
pluggable-deprecated.php	6.18 KB	-rw-r--r--
pluggable.php	124.92 KB	-rw-r--r--
plugin.php	36.25 KB	-rw-r--r--
post-formats.php	6.9 KB	-rw-r--r--
post-template.php	67.51 KB	-rw-r--r--
post-thumbnail-template.php	10.62 KB	-rw-r--r--
post.php	298.06 KB	-rw-r--r--
query.php	36.67 KB	-rw-r--r--
registration-functions.php	200 B	-rw-r--r--
registration.php	200 B	-rw-r--r--
rest-api.php	100.54 KB	-rw-r--r--
revision.php	30.51 KB	-rw-r--r--
rewrite.php	19.11 KB	-rw-r--r--
robots-template.php	5.06 KB	-rw-r--r--
rss-functions.php	277 B	-rw-r--r--
rss.php	22.66 KB	-rw-r--r--
script-loader.php	159.72 KB	-rw-r--r--
script-modules.php	12.02 KB	-rw-r--r--
session.php	258 B	-rw-r--r--
shortcodes.php	23.47 KB	-rw-r--r--
sitemaps.php	3.16 KB	-rw-r--r--
speculative-loading.php	11.6 KB	-rw-r--r--
spl-autoload-compat.php	441 B	-rw-r--r--
style-engine.php	7.86 KB	-rw-r--r--
taxonomy.php	174.13 KB	-rw-r--r--
template-canvas.php	544 B	-rw-r--r--
template-loader.php	4.17 KB	-rw-r--r--
template.php	37.92 KB	-rw-r--r--
theme-i18n.json	1.85 KB	-rw-r--r--
theme-previews.php	2.82 KB	-rw-r--r--
theme-templates.php	3.96 KB	-rw-r--r--
theme.json	9.26 KB	-rw-r--r--
theme.php	131.75 KB	-rw-r--r--
update.php	37.37 KB	-rw-r--r--
user.php	176.08 KB	-rw-r--r--
utf8.php	6.81 KB	-rw-r--r--
vars.php	6.45 KB	-rw-r--r--
version.php	1.08 KB	-rw-r--r--
view-config.php	18.64 KB	-rw-r--r--
view-transitions.php	602 B	-rw-r--r--
widgets.php	69.21 KB	-rw-r--r--
wp-db.php	445 B	-rw-r--r--
wp-diff.php	792 B	-rw-r--r--

Code Editor : class-wp-hook.php

<?php
/**
 * Plugin API: WP_Hook class
 *
 * @package WordPress
 * @subpackage Plugin
 * @since 4.7.0
 */

/**
 * Core class used to implement action and filter hook functionality.
 *
 * @since 4.7.0
 *
 * @see Iterator
 * @see ArrayAccess
 *
 * @phpstan-type Hook_Callback array{
 *   function: callable,
 *   accepted_args: int,
 * }
 *
 * @phpstan-implements Iterator<int, array<non-decimal-int-string, Hook_Callback>>
 * @phpstan-implements ArrayAccess<int, array<non-decimal-int-string, Hook_Callback>>
 */
#[AllowDynamicProperties]
final class WP_Hook implements Iterator, ArrayAccess {

/**
	 * Hook callbacks keyed by priority.
	 *
	 * @since 4.7.0
	 * @var array
	 * @phpstan-var array<int, array<non-decimal-int-string, Hook_Callback>>
	 */
	public $callbacks = array();

/**
	 * Priorities list.
	 *
	 * @since 6.4.0
	 * @var list<int>
	 */
	protected $priorities = array();

/**
	 * The priority keys of actively running iterations of a hook.
	 *
	 * @since 4.7.0
	 * @var array<int, list<int>>
	 */
	private $iterations = array();

/**
	 * The current priority of actively running iterations of a hook.
	 *
	 * @since 4.7.0
	 * @var array<int, int>
	 */
	private $current_priority = array();

/**
	 * Number of levels this hook can be recursively called.
	 *
	 * @since 4.7.0
	 * @var int
	 */
	private $nesting_level = 0;

/**
	 * Flag for if we're currently doing an action, rather than a filter.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	private $doing_action = false;

/**
	 * Adds a callback function to a filter hook.
	 *
	 * @since 4.7.0
	 *
	 * @param string   $hook_name     The name of the filter to add the callback to.
	 * @param callable $callback      The callback to be run when the filter is applied.
	 * @param int      $priority      The order in which the functions associated with a particular filter
	 *                                are executed. Lower numbers correspond with earlier execution,
	 *                                and functions with the same priority are executed in the order
	 *                                in which they were added to the filter.
	 * @param int      $accepted_args The number of arguments the function accepts.
	 */
	public function add_filter( $hook_name, $callback, $priority, $accepted_args ) {
		if ( null === $priority ) {
			$priority = 0;
		}

$idx = _wp_filter_build_unique_id( $hook_name, $callback, $priority );
		if ( null === $idx ) {
			return;
		}

$priority_existed = isset( $this->callbacks[ $priority ] );

$this->callbacks[ $priority ][ $idx ] = array(
			'function'      => $callback,
			'accepted_args' => (int) $accepted_args,
		);

// If we're adding a new priority to the list, put them back in sorted order.
		if ( ! $priority_existed && count( $this->callbacks ) > 1 ) {
			ksort( $this->callbacks, SORT_NUMERIC );
		}

$this->priorities = array_keys( $this->callbacks );

if ( $this->nesting_level > 0 ) {
			$this->resort_active_iterations( $priority, $priority_existed );
		}
	}

/**
	 * Handles resetting callback priority keys mid-iteration.
	 *
	 * @since 4.7.0
	 *
	 * @param false|int $new_priority     Optional. The priority of the new filter being added. Default false,
	 *                                    for no priority being added.
	 * @param bool      $priority_existed Optional. Flag for whether the priority already existed before the new
	 *                                    filter was added. Default false.
	 */
	private function resort_active_iterations( $new_priority = false, $priority_existed = false ) {
		$new_priorities = $this->priorities;

// If there are no remaining hooks, clear out all running iterations.
		if ( ! $new_priorities ) {
			foreach ( $this->iterations as $index => $iteration ) {
				$this->iterations[ $index ] = $new_priorities;
			}

return;
		}

$min = min( $new_priorities );

foreach ( $this->iterations as $index => &$iteration ) {
			$current = current( $iteration );

// If we're already at the end of this iteration, just leave the array pointer where it is.
			if ( false === $current ) {
				continue;
			}

$iteration = $new_priorities;

if ( $current < $min ) {
				array_unshift( $iteration, $current );
				continue;
			}

while ( current( $iteration ) < $current ) {
				if ( false === next( $iteration ) ) {
					break;
				}
			}

// If we have a new priority that didn't exist, but ::apply_filters() or ::do_action() thinks it's the current priority...
			if ( $new_priority === $this->current_priority[ $index ] && ! $priority_existed ) {
				/*
				 * ...and the new priority is the same as what $this->iterations thinks is the previous
				 * priority, we need to move back to it.
				 */

if ( false === current( $iteration ) ) {
					// If we've already moved off the end of the array, go back to the last element.
					$prev = end( $iteration );
				} else {
					// Otherwise, just go back to the previous element.
					$prev = prev( $iteration );
				}

if ( false === $prev ) {
					// Start of the array. Reset, and go about our day.
					reset( $iteration );
				} elseif ( $new_priority !== $prev ) {
					// Previous wasn't the same. Move forward again.
					next( $iteration );
				}
			}
		}

unset( $iteration );
	}

/**
	 * Removes a callback function from a filter hook.
	 *
	 * @since 4.7.0
	 *
	 * @param string                $hook_name The filter hook to which the function to be removed is hooked.
	 * @param callable|string|array $callback  The callback to be removed from running when the filter is applied.
	 *                                         This method can be called unconditionally to speculatively remove
	 *                                         a callback that may or may not exist.
	 * @param int                   $priority  The exact priority used when adding the original filter callback.
	 * @return bool Whether the callback existed before it was removed.
	 */
	public function remove_filter( $hook_name, $callback, $priority ) {
		if ( null === $priority ) {
			$priority = 0;
		}

$function_key = _wp_filter_build_unique_id( $hook_name, $callback, $priority );

$exists = isset( $function_key, $this->callbacks[ $priority ][ $function_key ] );

if ( $exists ) {
			unset( $this->callbacks[ $priority ][ $function_key ] );

if ( ! $this->callbacks[ $priority ] ) {
				unset( $this->callbacks[ $priority ] );

$this->priorities = array_keys( $this->callbacks );

if ( $this->nesting_level > 0 ) {
					$this->resort_active_iterations();
				}
			}
		}

return $exists;
	}

/**
	 * Checks if a specific callback has been registered for this hook.
	 *
	 * When using the `$callback` argument, this function may return a non-boolean value
	 * that evaluates to false (e.g. 0), so use the `===` operator for testing the return value.
	 *
	 * @since 4.7.0
	 * @since 6.9.0 Added the `$priority` parameter.
	 *
	 * @param string                      $hook_name Optional. The name of the filter hook. Default empty.
	 * @param callable|string|array|false $callback  Optional. The callback to check for.
	 *                                               This method can be called unconditionally to speculatively check
	 *                                               a callback that may or may not exist. Default false.
	 * @param int|false                   $priority  Optional. The specific priority at which to check for the callback.
	 *                                               Default false.
	 * @return bool|int If `$callback` is omitted, returns boolean for whether the hook has
	 *                  anything registered. When checking a specific function, the priority
	 *                  of that hook is returned, or false if the function is not attached.
	 *                  If `$callback` and `$priority` are both provided, a boolean is returned
	 *                  for whether the specific function is registered at that priority.
	 */
	public function has_filter( $hook_name = '', $callback = false, $priority = false ) {
		if ( false === $callback ) {
			return $this->has_filters();
		}

$function_key = _wp_filter_build_unique_id( $hook_name, $callback, false );

if ( ! $function_key ) {
			return false;
		}

if ( is_int( $priority ) ) {
			return isset( $this->callbacks[ $priority ][ $function_key ] );
		}

foreach ( $this->callbacks as $callback_priority => $callbacks ) {
			if ( isset( $callbacks[ $function_key ] ) ) {
				return $callback_priority;
			}
		}

return false;
	}

/**
	 * Checks if any callbacks have been registered for this hook.
	 *
	 * @since 4.7.0
	 *
	 * @return bool True if callbacks have been registered for the current hook, otherwise false.
	 */
	public function has_filters() {
		foreach ( $this->callbacks as $callbacks ) {
			if ( $callbacks ) {
				return true;
			}
		}

return false;
	}

/**
	 * Removes all callbacks from the current filter.
	 *
	 * @since 4.7.0
	 *
	 * @param int|false $priority Optional. The priority number to remove. Default false.
	 */
	public function remove_all_filters( $priority = false ) {
		if ( ! $this->callbacks ) {
			return;
		}

if ( false === $priority ) {
			$this->callbacks  = array();
			$this->priorities = array();
		} elseif ( isset( $this->callbacks[ $priority ] ) ) {
			unset( $this->callbacks[ $priority ] );
			$this->priorities = array_keys( $this->callbacks );
		}

if ( $this->nesting_level > 0 ) {
			$this->resort_active_iterations();
		}
	}

/**
	 * Calls the callback functions that have been added to a filter hook.
	 *
	 * @since 4.7.0
	 *
	 * @param mixed $value The value to filter.
	 * @param array $args  Additional parameters to pass to the callback functions.
	 *                     This array is expected to include $value at index 0.
	 * @return mixed The filtered value after all hooked functions are applied to it.
	 */
	public function apply_filters( $value, $args ) {
		if ( ! $this->callbacks ) {
			return $value;
		}

$nesting_level = $this->nesting_level++;

$this->iterations[ $nesting_level ] = $this->priorities;

$num_args = count( $args );

do {
			$this->current_priority[ $nesting_level ] = current( $this->iterations[ $nesting_level ] );

$priority = $this->current_priority[ $nesting_level ];

foreach ( $this->callbacks[ $priority ] as $the_ ) {
				if ( ! $this->doing_action ) {
					$args[0] = $value;
				}

// Avoid the array_slice() if possible.
				if ( 0 === $the_['accepted_args'] ) {
					$value = call_user_func( $the_['function'] );
				} elseif ( $the_['accepted_args'] >= $num_args ) {
					$value = call_user_func_array( $the_['function'], $args );
				} else {
					$value = call_user_func_array( $the_['function'], array_slice( $args, 0, $the_['accepted_args'] ) );
				}
			}
		} while ( false !== next( $this->iterations[ $nesting_level ] ) );

unset( $this->iterations[ $nesting_level ] );
		unset( $this->current_priority[ $nesting_level ] );

--$this->nesting_level;

return $value;
	}

/**
	 * Calls the callback functions that have been added to an action hook.
	 *
	 * @since 4.7.0
	 *
	 * @param array $args Parameters to pass to the callback functions.
	 */
	public function do_action( $args ) {
		$this->doing_action = true;
		$this->apply_filters( '', $args );

// If there are recursive calls to the current action, we haven't finished it until we get to the last one.
		if ( ! $this->nesting_level ) {
			$this->doing_action = false;
		}
	}

/**
	 * Processes the functions hooked into the 'all' hook.
	 *
	 * @since 4.7.0
	 *
	 * @param array $args Arguments to pass to the hook callbacks. Passed by reference.
	 */
	public function do_all_hook( &$args ) {
		$nesting_level                      = $this->nesting_level++;
		$this->iterations[ $nesting_level ] = $this->priorities;

do {
			$priority = current( $this->iterations[ $nesting_level ] );

foreach ( $this->callbacks[ $priority ] as $the_ ) {
				call_user_func_array( $the_['function'], $args );
			}
		} while ( false !== next( $this->iterations[ $nesting_level ] ) );

unset( $this->iterations[ $nesting_level ] );
		--$this->nesting_level;
	}

/**
	 * Return the current priority level of the currently running iteration of the hook.
	 *
	 * @since 4.7.0
	 *
	 * @return int|false If the hook is running, return the current priority level.
	 *                   If it isn't running, return false.
	 */
	public function current_priority() {
		if ( false === current( $this->iterations ) ) {
			return false;
		}

return current( current( $this->iterations ) );
	}

/**
	 * Normalizes filters set up before WordPress has initialized to WP_Hook objects.
	 *
	 * The `$filters` parameter should be an array keyed by hook name, with values
	 * containing either:
	 *
	 *  - A `WP_Hook` instance
	 *  - An array of callbacks keyed by their priorities
	 *
	 * Examples:
	 *
	 *     $filters = array(
	 *         'wp_fatal_error_handler_enabled' => array(
	 *             10 => array(
	 *                 array(
	 *                     'accepted_args' => 0,
	 *                     'function'      => function() {
	 *                         return false;
	 *                     },
	 *                 ),
	 *             ),
	 *         ),
	 *     );
	 *
	 * @since 4.7.0
	 *
	 * @param array $filters Filters to normalize. See documentation above for details.
	 * @phpstan-param array<string, WP_Hook|array<int, array<Hook_Callback>>> $filters
	 * @return array<string, WP_Hook> Array of normalized filters keyed by hook name.
	 */
	public static function build_preinitialized_hooks( $filters ) {
		/** @var array<string, WP_Hook> $normalized */
		$normalized = array();

foreach ( $filters as $hook_name => $callback_groups ) {
			if ( $callback_groups instanceof WP_Hook ) {
				$normalized[ $hook_name ] = $callback_groups;
				continue;
			}

$hook = new WP_Hook();

// Loop through callback groups.
			foreach ( $callback_groups as $priority => $callbacks ) {

// Loop through callbacks.
				foreach ( $callbacks as $cb ) {
					$hook->add_filter( $hook_name, $cb['function'], $priority, $cb['accepted_args'] );
				}
			}

$normalized[ $hook_name ] = $hook;
		}

return $normalized;
	}

/**
	 * Determines whether an offset value exists.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/arrayaccess.offsetexists.php
	 *
	 * @param int $offset An offset to check for.
	 * @return bool True if the offset exists, false otherwise.
	 */
	#[ReturnTypeWillChange]
	public function offsetExists( $offset ) {
		return isset( $this->callbacks[ $offset ] );
	}

/**
	 * Retrieves a value at a specified offset.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/arrayaccess.offsetget.php
	 *
	 * @param int $offset The offset to retrieve.
	 * @return array|null If set, the value at the specified offset, null otherwise.
	 * @phpstan-return array<non-decimal-int-string, Hook_Callback>|null
	 */
	#[ReturnTypeWillChange]
	public function offsetGet( $offset ) {
		return $this->callbacks[ $offset ] ?? null;
	}

/**
	 * Sets a value at a specified offset.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/arrayaccess.offsetset.php
	 *
	 * @param int|null $offset The offset to assign the value to.
	 * @param array    $value The value to set.
	 * @phpstan-param array<non-decimal-int-string, Hook_Callback> $value
	 */
	#[ReturnTypeWillChange]
	public function offsetSet( $offset, $value ) {
		if ( is_null( $offset ) ) {
			$this->callbacks[] = $value;
		} else {
			$this->callbacks[ $offset ] = $value;
		}

$this->priorities = array_keys( $this->callbacks );
	}

/**
	 * Unsets a specified offset.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/arrayaccess.offsetunset.php
	 *
	 * @param int $offset The offset to unset.
	 */
	#[ReturnTypeWillChange]
	public function offsetUnset( $offset ) {
		unset( $this->callbacks[ $offset ] );
		$this->priorities = array_keys( $this->callbacks );
	}

/**
	 * Returns the current element.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/iterator.current.php
	 *
	 * @return array|false Array of callbacks at current priority, false if there are no more elements.
	 * @phpstan-return array<non-decimal-int-string, Hook_Callback>|false
	 */
	#[ReturnTypeWillChange]
	public function current() {
		return current( $this->callbacks );
	}

/**
	 * Moves forward to the next element.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/iterator.next.php
	 *
	 * @return array|false Array of callbacks at next priority, false if there are no more elements.
	 * @phpstan-return array<non-decimal-int-string, Hook_Callback>|false
	 */
	#[ReturnTypeWillChange]
	public function next() {
		return next( $this->callbacks );
	}

/**
	 * Returns the key of the current element.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/iterator.key.php
	 *
	 * @return int|null Returns current priority on success, or NULL on failure
	 */
	#[ReturnTypeWillChange]
	public function key() {
		return key( $this->callbacks );
	}

/**
	 * Checks if current position is valid.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/iterator.valid.php
	 *
	 * @return bool Whether the current position is valid.
	 */
	#[ReturnTypeWillChange]
	public function valid() {
		return key( $this->callbacks ) !== null;
	}

/**
	 * Rewinds the Iterator to the first element.
	 *
	 * @since 4.7.0
	 *
	 * @link https://www.php.net/manual/en/iterator.rewind.php
	 */
	#[ReturnTypeWillChange]
	public function rewind() {
		reset( $this->callbacks );
	}
}

Code Editor : class-wp-hook.php

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