FM / wp-includes

/home/altere25/public_html/wp-includes

Name	Size	Mode	Actions
abilities-api/	-	0755	rm
ai-client/	-	0755	rm
assets/	-	0755	rm
block-bindings/	-	0755	rm
block-patterns/	-	0755	rm
block-supports/	-	0755	rm
blocks/	-	0755	rm
build/	-	0755	rm
certificates/	-	0755	rm
css/	-	0755	rm
customize/	-	0755	rm
fonts/	-	0755	rm
html-api/	-	0755	rm
ID3/	-	0755	rm
images/	-	0755	rm
interactivity-api/	-	0755	rm
IXR/	-	0755	rm
js/	-	0755	rm
l10n/	-	0755	rm
php-ai-client/	-	0755	rm
php-compat/	-	0755	rm
PHPMailer/	-	0755	rm
pomo/	-	0755	rm
Requests/	-	0755	rm
rest-api/	-	0755	rm
SimplePie/	-	0755	rm
sitemaps/	-	0755	rm
sodium_compat/	-	0755	rm
style-engine/	-	0755	rm
Text/	-	0755	rm
theme-compat/	-	0755	rm
widgets/	-	0755	rm
abilities-api.php	32800	0644	edit dl rm
abilities.php	11797	0644	edit dl rm
admin-bar.php	40067	0644	edit dl rm
ai-client.php	2549	0644	edit dl rm
atomlib.php	12181	0644	edit dl rm
author-template.php	19844	0644	edit dl rm
block-bindings.php	7632	0644	edit dl rm
block-editor.php	28724	0644	edit dl rm
block-i18n.json	316	0644	edit dl rm
block-patterns.php	15606	0644	edit dl rm
block-template-utils.php	63168	0644	edit dl rm
block-template.php	18257	0644	edit dl rm
blocks.php	124205	0644	edit dl rm
bookmark-template.php	12768	0644	edit dl rm
bookmark.php	15427	0644	edit dl rm
cache-compat.php	11021	0644	edit dl rm
cache.php	13486	0644	edit dl rm
canonical.php	34786	0644	edit dl rm
capabilities.php	43584	0644	edit dl rm
category-template.php	56990	0644	edit dl rm
category.php	12834	0644	edit dl rm
class-avif-info.php	30008	0644	edit dl rm
class-feed.php	539	0644	edit dl rm
class-http.php	367	0644	edit dl rm
class-IXR.php	2609	0644	edit dl rm
class-json.php	43676	0644	edit dl rm
class-oembed.php	401	0644	edit dl rm
class-phpass.php	6771	0644	edit dl rm
class-phpmailer.php	664	0644	edit dl rm
class-pop3.php	21100	0644	edit dl rm
class-requests.php	2237	0644	edit dl rm
class-simplepie.php	453	0644	edit dl rm
class-smtp.php	457	0644	edit dl rm
class-snoopy.php	37715	0644	edit dl rm
class-walker-category-dropdown.php	2469	0644	edit dl rm
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class-walker-comment.php	14221	0644	edit dl rm
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class-walker-page-dropdown.php	2710	0644	edit dl rm
class-walker-page.php	7612	0644	edit dl rm
class-wp-admin-bar.php	18002	0644	edit dl rm
class-wp-ajax-response.php	5288	0644	edit dl rm
class-wp-application-passwords.php	17099	0644	edit dl rm
class-wp-block-bindings-registry.php	8263	0644	edit dl rm
class-wp-block-bindings-source.php	2992	0644	edit dl rm
class-wp-block-editor-context.php	1350	0644	edit dl rm
class-wp-block-list.php	4713	0644	edit dl rm
class-wp-block-metadata-registry.php	11846	0644	edit dl rm
class-wp-block-parser-block.php	2555	0644	edit dl rm
class-wp-block-parser-frame.php	1994	0644	edit dl rm
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class-wp-block-pattern-categories-registry.php	4383	0644	edit dl rm
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class-wp-block-processor.php	69914	0644	edit dl rm
class-wp-block-styles-registry.php	6419	0644	edit dl rm
class-wp-block-supports.php	7578	0644	edit dl rm
class-wp-block-template.php	2111	0644	edit dl rm
class-wp-block-templates-registry.php	7080	0644	edit dl rm
class-wp-block-type-registry.php	5305	0644	edit dl rm
class-wp-block-type.php	17222	0644	edit dl rm
class-wp-block.php	28236	0644	edit dl rm
class-wp-classic-to-block-menu-converter.php	4026	0644	edit dl rm
class-wp-comment-query.php	49040	0644	edit dl rm
class-wp-comment.php	17249	0644	edit dl rm
class-wp-connector-registry.php	15181	0644	edit dl rm
class-wp-customize-control.php	26112	0644	edit dl rm
class-wp-customize-manager.php	202908	0644	edit dl rm
class-wp-customize-nav-menus.php	58034	0644	edit dl rm
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class-wp-date-query.php	35970	0644	edit dl rm
class-wp-dependencies.php	17089	0644	edit dl rm
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class-wp-editor.php	72228	0644	edit dl rm
class-wp-embed.php	15908	0644	edit dl rm
class-wp-error.php	7514	0644	edit dl rm
class-wp-exception.php	253	0644	edit dl rm
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class-wp-feed-cache-transient.php	3304	0644	edit dl rm
class-wp-feed-cache.php	969	0644	edit dl rm
class-wp-filter-sentinel.php	760	0644	edit dl rm
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class-wp-icon-collections-registry.php	5805	0644	edit dl rm
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class-wp-image-editor.php	17456	0644	edit dl rm
class-wp-list-util.php	7443	0644	edit dl rm
class-wp-locale-switcher.php	6776	0644	edit dl rm
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class-wp-matchesmapregex.php	1828	0644	edit dl rm
class-wp-meta-query.php	30507	0644	edit dl rm
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class-wp-navigation-fallback.php	9193	0644	edit dl rm
class-wp-network-query.php	19989	0644	edit dl rm
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class-wp-object-cache.php	17524	0644	edit dl rm
class-wp-oembed-controller.php	6905	0644	edit dl rm
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class-wp-paused-extensions-storage.php	5067	0644	edit dl rm
class-wp-phpmailer.php	4348	0644	edit dl rm
class-wp-plugin-dependencies.php	25209	0644	edit dl rm
class-wp-post-type.php	30672	0644	edit dl rm
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class-wp-query.php	164148	0644	edit dl rm
class-wp-recovery-mode-cookie-service.php	6877	0644	edit dl rm
class-wp-recovery-mode-email-service.php	11162	0644	edit dl rm
class-wp-recovery-mode-key-service.php	4914	0644	edit dl rm
class-wp-recovery-mode-link-service.php	3523	0644	edit dl rm
class-wp-recovery-mode.php	11460	0644	edit dl rm
class-wp-rewrite.php	63693	0644	edit dl rm
class-wp-role.php	2523	0644	edit dl rm
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class-wp-script-modules.php	40743	0644	edit dl rm
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class-wp-session-tokens.php	7319	0644	edit dl rm
class-wp-simplepie-file.php	3552	0644	edit dl rm
class-wp-simplepie-sanitize-kses.php	1903	0644	edit dl rm
class-wp-site-query.php	31482	0644	edit dl rm
class-wp-site.php	7836	0644	edit dl rm
class-wp-speculation-rules.php	7884	0644	edit dl rm
class-wp-styles.php	13316	0644	edit dl rm
class-wp-tax-query.php	19577	0644	edit dl rm
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class-wp-text-diff-renderer-inline.php	979	0644	edit dl rm
class-wp-text-diff-renderer-table.php	18925	0644	edit dl rm
class-wp-textdomain-registry.php	10481	0644	edit dl rm
class-wp-theme-json-data.php	1805	0644	edit dl rm
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class-wp-token-map.php	29032	0644	edit dl rm
class-wp-url-pattern-prefixer.php	4802	0644	edit dl rm
class-wp-user-meta-session-tokens.php	2954	0644	edit dl rm
class-wp-user-query.php	44102	0644	edit dl rm
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class-wp-walker.php	13292	0644	edit dl rm
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class-wp-widget.php	18452	0644	edit dl rm
class-wp-xmlrpc-server.php	216272	0644	edit dl rm
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class-wpdb.php	121437	0644	edit dl rm
class.wp-dependencies.php	373	0644	edit dl rm
class.wp-scripts.php	343	0644	edit dl rm
class.wp-styles.php	338	0644	edit dl rm
comment-template.php	103211	0644	edit dl rm
comment.php	150630	0644	edit dl rm
compat-utf8.php	19386	0644	edit dl rm
compat.php	22479	0644	edit dl rm
connectors.php	32922	0644	edit dl rm
cron.php	46266	0644	edit dl rm
date.php	400	0644	edit dl rm
default-constants.php	11365	0644	edit dl rm
default-filters.php	39500	0644	edit dl rm
default-widgets.php	2288	0644	edit dl rm
deprecated.php	193977	0644	edit dl rm
embed-template.php	338	0644	edit dl rm
embed.php	39215	0644	edit dl rm
error-protection.php	4092	0644	edit dl rm
feed-atom-comments.php	5504	0644	edit dl rm
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feed-rdf.php	2668	0644	edit dl rm
feed-rss.php	1189	0644	edit dl rm
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feed.php	25189	0644	edit dl rm
fonts.php	9789	0644	edit dl rm
formatting.php	357652	0644	edit dl rm
functions.php	295481	0644	edit dl rm
functions.wp-scripts.php	20492	0644	edit dl rm
functions.wp-styles.php	8654	0644	edit dl rm
general-template.php	183472	0644	edit dl rm
global-styles-and-settings.php	20780	0644	edit dl rm
http.php	28961	0644	edit dl rm
https-detection.php	5857	0644	edit dl rm
https-migration.php	4741	0644	edit dl rm
icons.php	6334	0644	edit dl rm
json-schema.php	7802	0644	edit dl rm
kses.php	88497	0644	edit dl rm
l10n.php	71415	0644	edit dl rm
link-template.php	160143	0644	edit dl rm
load.php	56475	0644	edit dl rm
locale.php	162	0644	edit dl rm
media-template.php	65759	0644	edit dl rm
media.php	236804	0644	edit dl rm
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plugin.php	36669	0644	edit dl rm
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registration.php	200	0644	edit dl rm
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robots-template.php	5185	0644	edit dl rm
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sitemaps.php	3238	0644	edit dl rm
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style-engine.php	8045	0644	edit dl rm
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template-canvas.php	544	0644	edit dl rm
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template.php	36824	0644	edit dl rm
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theme.json	9480	0644	edit dl rm
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version.php	1101	0644	edit dl rm
view-config.php	19087	0644	edit dl rm
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Edit: /home/altere25/public_html/wp-includes/plugin.php (36669B)

<?php
/**
 * The plugin API is located in this file, which allows for creating actions
 * and filters and hooking functions, and methods. The functions or methods will
 * then be run when the action or filter is called.
 *
 * The API callback examples reference functions, but can be methods of classes.
 * To hook methods, you'll need to pass an array one of two ways.
 *
 * Any of the syntaxes explained in the PHP documentation for the
 * {@link https://www.php.net/manual/en/language.pseudo-types.php#language.types.callback 'callback'}
 * type are valid.
 *
 * Also see the {@link https://developer.wordpress.org/plugins/ Plugin API} for
 * more information and examples on how to use a lot of these functions.
 *
 * This file should have no external dependencies.
 *
 * @package WordPress
 * @subpackage Plugin
 * @since 1.5.0
 */

// Initialize the filter globals.
require __DIR__ . '/class-wp-hook.php';
require __DIR__ . '/class-wp-filter-sentinel.php';

/** @var WP_Hook[] $wp_filter */
global $wp_filter;

/** @var int[] $wp_actions */
global $wp_actions;

/** @var int[] $wp_filters */
global $wp_filters;

/** @var string[] $wp_current_filter */
global $wp_current_filter;

if ( $wp_filter ) {
	$wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
} else {
	$wp_filter = array();
}

if ( ! isset( $wp_actions ) ) {
	$wp_actions = array();
}

if ( ! isset( $wp_filters ) ) {
	$wp_filters = array();
}

if ( ! isset( $wp_current_filter ) ) {
	$wp_current_filter = array();
}

/**
 * Adds a callback function to a filter hook.
 *
 * WordPress offers filter hooks to allow plugins to modify
 * various types of internal data at runtime.
 *
 * A plugin can modify data by binding a callback to a filter hook. When the filter
 * is later applied, each bound callback is run in order of priority, and given
 * the opportunity to modify a value by returning a new value.
 *
 * The following example shows how a callback function is bound to a filter hook.
 *
 * Note that `$example` is passed to the callback, (maybe) modified, then returned:
 *
 *     function example_callback( $example ) {
 *         // Maybe modify $example in some way.
 *         return $example;
 *     }
 *     add_filter( 'example_filter', 'example_callback' );
 *
 * Bound callbacks can accept from none to the total number of arguments passed as parameters
 * in the corresponding apply_filters() call.
 *
 * In other words, if an apply_filters() call passes four total arguments, callbacks bound to
 * it can accept none (the same as 1) of the arguments or up to four. The important part is that
 * the `$accepted_args` value must reflect the number of arguments the bound callback *actually*
 * opted to accept. If no arguments were accepted by the callback that is considered to be the
 * same as accepting 1 argument. For example:
 *
 *     // Filter call.
 *     $value = apply_filters( 'hook', $value, $arg2, $arg3 );
 *
 *     // Accepting zero/one arguments.
 *     function example_callback() {
 *         ...
 *         return 'some value';
 *     }
 *     add_filter( 'hook', 'example_callback' ); // Where $priority is default 10, $accepted_args is default 1.
 *
 *     // Accepting two arguments (three possible).
 *     function example_callback( $value, $arg2 ) {
 *         ...
 *         return $maybe_modified_value;
 *     }
 *     add_filter( 'hook', 'example_callback', 10, 2 ); // Where $priority is 10, $accepted_args is 2.
 *
 * *Note:* The function will return true whether or not the callback is valid.
 * It is up to you to take care. This is done for optimization purposes, so
 * everything is as quick as possible.
 *
 * @since 0.71
 *
 * @global WP_Hook[] $wp_filter A multidimensional array of all hooks and the callbacks hooked to them.
 *
 * @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      Optional. Used to specify 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. Default 10.
 * @param int      $accepted_args Optional. The number of arguments the function accepts. Default 1.
 * @return true Always returns true.
 */
function add_filter( $hook_name, $callback, $priority = 10, $accepted_args = 1 ) {
	global $wp_filter;

if ( ! isset( $wp_filter[ $hook_name ] ) ) {
		$wp_filter[ $hook_name ] = new WP_Hook();
	}

$wp_filter[ $hook_name ]->add_filter( $hook_name, $callback, $priority, $accepted_args );

return true;
}

/**
 * Calls the callback functions that have been added to a filter hook.
 *
 * This function invokes all functions attached to filter hook `$hook_name`.
 * It is possible to create new filter hooks by simply calling this function,
 * specifying the name of the new hook using the `$hook_name` parameter.
 *
 * The function also allows for multiple additional arguments to be passed to hooks.
 *
 * Example usage:
 *
 *     // The filter callback function.
 *     function example_callback( $string, $arg1, $arg2 ) {
 *         // (maybe) modify $string.
 *         return $string;
 *     }
 *     add_filter( 'example_filter', 'example_callback', 10, 3 );
 *
 *     /*
 *      * Apply the filters by calling the 'example_callback()' function
 *      * that's hooked onto `example_filter` above.
 *      *
 *      * - 'example_filter' is the filter hook.
 *      * - 'filter me' is the value being filtered.
 *      * - $arg1 and $arg2 are the additional arguments passed to the callback.
 *     $value = apply_filters( 'example_filter', 'filter me', $arg1, $arg2 );
 *
 * @since 0.71
 * @since 6.0.0 Formalized the existing and already documented `...$args` parameter
 *              by adding it to the function signature.
 *
 * @global WP_Hook[] $wp_filter         Stores all of the filters and actions.
 * @global int[]     $wp_filters        Stores the number of times each filter was triggered.
 * @global string[]  $wp_current_filter Stores the list of current filters with the current one last.
 *
 * @param string $hook_name The name of the filter hook.
 * @param mixed  $value     The value to filter.
 * @param mixed  ...$args   Optional. Additional parameters to pass to the callback functions.
 * @return mixed The filtered value after all hooked functions are applied to it.
 */
function apply_filters( $hook_name, $value, ...$args ) {
	global $wp_filter, $wp_filters, $wp_current_filter;

if ( ! isset( $wp_filters[ $hook_name ] ) ) {
		$wp_filters[ $hook_name ] = 1;
	} else {
		++$wp_filters[ $hook_name ];
	}

// Do 'all' actions first.
	if ( isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;

$all_args = func_get_args(); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection
		_wp_call_all_hook( $all_args );
	}

if ( ! isset( $wp_filter[ $hook_name ] ) ) {
		if ( isset( $wp_filter['all'] ) ) {
			array_pop( $wp_current_filter );
		}

return $value;
	}

if ( ! isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;
	}

// Pass the value to WP_Hook.
	array_unshift( $args, $value );

$filtered = $wp_filter[ $hook_name ]->apply_filters( $value, $args );

array_pop( $wp_current_filter );

return $filtered;
}

/**
 * Calls the callback functions that have been added to a filter hook, specifying arguments in an array.
 *
 * @since 3.0.0
 *
 * @see apply_filters() This function is identical, but the arguments passed to the
 *                      functions hooked to `$hook_name` are supplied using an array.
 *
 * @global WP_Hook[] $wp_filter         Stores all of the filters and actions.
 * @global int[]     $wp_filters        Stores the number of times each filter was triggered.
 * @global string[]  $wp_current_filter Stores the list of current filters with the current one last.
 *
 * @param string $hook_name The name of the filter hook.
 * @param array  $args      The arguments supplied to the functions hooked to `$hook_name`.
 * @return mixed The filtered value after all hooked functions are applied to it.
 */
function apply_filters_ref_array( $hook_name, $args ) {
	global $wp_filter, $wp_filters, $wp_current_filter;

if ( ! isset( $wp_filters[ $hook_name ] ) ) {
		$wp_filters[ $hook_name ] = 1;
	} else {
		++$wp_filters[ $hook_name ];
	}

// Do 'all' actions first.
	if ( isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;
		$all_args            = func_get_args(); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection
		_wp_call_all_hook( $all_args );
	}

if ( ! isset( $wp_filter[ $hook_name ] ) ) {
		if ( isset( $wp_filter['all'] ) ) {
			array_pop( $wp_current_filter );
		}

return $args[0];
	}

if ( ! isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;
	}

$filtered = $wp_filter[ $hook_name ]->apply_filters( $args[0], $args );

array_pop( $wp_current_filter );

return $filtered;
}

/**
 * Checks if any filter has been registered for a hook.
 *
 * When using the `$callback` argument, this function may return a non-boolean value
 * that evaluates to false (e.g. 0), so use the `===` operator for testing the return value.
 *
 * @since 2.5.0
 * @since 6.9.0 Added the `$priority` parameter.
 *
 * @global WP_Hook[] $wp_filter Stores all of the filters and actions.
 *
 * @param string                      $hook_name The name of the filter hook.
 * @param callable|string|array|false $callback  Optional. The callback to check for.
 *                                               This function 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.
 */
function has_filter( $hook_name, $callback = false, $priority = false ) {
	global $wp_filter;

if ( ! isset( $wp_filter[ $hook_name ] ) ) {
		return false;
	}

return $wp_filter[ $hook_name ]->has_filter( $hook_name, $callback, $priority );
}

/**
 * Removes a callback function from a filter hook.
 *
 * This can be used to remove default functions attached to a specific filter
 * hook and possibly replace them with a substitute.
 *
 * To remove a hook, the `$callback` and `$priority` arguments must match
 * when the hook was added. This goes for both filters and actions. No warning
 * will be given on removal failure.
 *
 * @since 1.2.0
 *
 * @global WP_Hook[] $wp_filter Stores all of the filters and actions.
 *
 * @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 function can be called unconditionally to speculatively remove
 *                                         a callback that may or may not exist.
 * @param int                   $priority  Optional. The exact priority used when adding the original
 *                                         filter callback. Default 10.
 * @return bool Whether the function existed before it was removed.
 */
function remove_filter( $hook_name, $callback, $priority = 10 ) {
	global $wp_filter;

$r = false;

if ( isset( $wp_filter[ $hook_name ] ) ) {
		$r = $wp_filter[ $hook_name ]->remove_filter( $hook_name, $callback, $priority );

if ( ! $wp_filter[ $hook_name ]->callbacks ) {
			unset( $wp_filter[ $hook_name ] );
		}
	}

return $r;
}

/**
 * Removes all of the callback functions from a filter hook.
 *
 * @since 2.7.0
 *
 * @global WP_Hook[] $wp_filter Stores all of the filters and actions.
 *
 * @param string    $hook_name The filter to remove callbacks from.
 * @param int|false $priority  Optional. The priority number to remove them from.
 *                             Default false.
 * @return true Always returns true.
 */
function remove_all_filters( $hook_name, $priority = false ) {
	global $wp_filter;

if ( isset( $wp_filter[ $hook_name ] ) ) {
		$wp_filter[ $hook_name ]->remove_all_filters( $priority );

if ( ! $wp_filter[ $hook_name ]->has_filters() ) {
			unset( $wp_filter[ $hook_name ] );
		}
	}

return true;
}

/**
 * Retrieves the name of the current filter hook.
 *
 * @since 2.5.0
 *
 * @global string[] $wp_current_filter Stores the list of current filters with the current one last
 *
 * @return string|false Hook name of the current filter, false if no filter is running.
 */
function current_filter() {
	global $wp_current_filter;

return end( $wp_current_filter );
}

/**
 * Returns whether or not a filter hook is currently being processed.
 *
 * The function current_filter() only returns the most recent filter being executed.
 * did_filter() returns the number of times a filter has been applied during
 * the current request.
 *
 * This function allows detection for any filter currently being executed
 * (regardless of whether it's the most recent filter to fire, in the case of
 * hooks called from hook callbacks) to be verified.
 *
 * @since 3.9.0
 *
 * @see current_filter()
 * @see did_filter()
 * @global string[] $wp_current_filter Current filter.
 *
 * @param string|null $hook_name Optional. Filter hook to check. Defaults to null,
 *                               which checks if any filter is currently being run.
 * @return bool Whether the filter is currently in the stack.
 */
function doing_filter( $hook_name = null ) {
	global $wp_current_filter;

if ( null === $hook_name ) {
		return ! empty( $wp_current_filter );
	}

return in_array( $hook_name, $wp_current_filter, true );
}

/**
 * Retrieves the number of times a filter has been applied during the current request.
 *
 * @since 6.1.0
 *
 * @global int[] $wp_filters Stores the number of times each filter was triggered.
 *
 * @param string $hook_name The name of the filter hook.
 * @return int The number of times the filter hook has been applied.
 */
function did_filter( $hook_name ) {
	global $wp_filters;

if ( ! isset( $wp_filters[ $hook_name ] ) ) {
		return 0;
	}

return $wp_filters[ $hook_name ];
}

/**
 * Adds a callback function to an action hook.
 *
 * Actions are the hooks that the WordPress core launches at specific points
 * during execution, or when specific events occur. Plugins can specify that
 * one or more of its PHP functions are executed at these points, using the
 * Action API.
 *
 * @since 1.2.0
 *
 * @param string   $hook_name       The name of the action to add the callback to.
 * @param callable $callback        The callback to be run when the action is called.
 * @param int      $priority        Optional. Used to specify the order in which the functions
 *                                  associated with a particular action 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 action. Default 10.
 * @param int      $accepted_args   Optional. The number of arguments the function accepts. Default 1.
 * @return true Always returns true.
 */
function add_action( $hook_name, $callback, $priority = 10, $accepted_args = 1 ) {
	return add_filter( $hook_name, $callback, $priority, $accepted_args );
}

/**
 * Calls the callback functions that have been added to an action hook.
 *
 * This function invokes all functions attached to action hook `$hook_name`.
 * It is possible to create new action hooks by simply calling this function,
 * specifying the name of the new hook using the `$hook_name` parameter.
 *
 * You can pass extra arguments to the hooks, much like you can with `apply_filters()`.
 *
 * Example usage:
 *
 *     // The action callback function.
 *     function example_callback( $arg1, $arg2 ) {
 *         // (maybe) do something with the args.
 *     }
 *     add_action( 'example_action', 'example_callback', 10, 2 );
 *
 *     /*
 *      * Trigger the actions by calling the 'example_callback()' function
 *      * that's hooked onto `example_action` above.
 *      *
 *      * - 'example_action' is the action hook.
 *      * - $arg1 and $arg2 are the additional arguments passed to the callback.
 *     do_action( 'example_action', $arg1, $arg2 );
 *
 * @since 1.2.0
 * @since 5.3.0 Formalized the existing and already documented `...$arg` parameter
 *              by adding it to the function signature.
 *
 * @global WP_Hook[] $wp_filter         Stores all of the filters and actions.
 * @global int[]     $wp_actions        Stores the number of times each action was triggered.
 * @global string[]  $wp_current_filter Stores the list of current filters with the current one last.
 *
 * @param string $hook_name The name of the action to be executed.
 * @param mixed  ...$arg    Optional. Additional arguments which are passed on to the
 *                          functions hooked to the action. Default empty.
 */
function do_action( $hook_name, ...$arg ) {
	global $wp_filter, $wp_actions, $wp_current_filter;

if ( ! isset( $wp_actions[ $hook_name ] ) ) {
		$wp_actions[ $hook_name ] = 1;
	} else {
		++$wp_actions[ $hook_name ];
	}

if ( ! isset( $wp_filter[ $hook_name ] ) ) {
		if ( isset( $wp_filter['all'] ) ) {
			array_pop( $wp_current_filter );
		}

return;
	}

if ( ! isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;
	}

if ( empty( $arg ) ) {
		$arg[] = '';
	} elseif ( is_array( $arg[0] ) && 1 === count( $arg[0] ) && isset( $arg[0][0] ) && is_object( $arg[0][0] ) ) {
		// Backward compatibility for PHP4-style passing of `array( &$this )` as action `$arg`.
		$arg[0] = $arg[0][0];
	}

$wp_filter[ $hook_name ]->do_action( $arg );

array_pop( $wp_current_filter );
}

/**
 * Calls the callback functions that have been added to an action hook, specifying arguments in an array.
 *
 * @since 2.1.0
 *
 * @see do_action() This function is identical, but the arguments passed to the
 *                  functions hooked to `$hook_name` are supplied using an array.
 *
 * @global WP_Hook[] $wp_filter         Stores all of the filters and actions.
 * @global int[]     $wp_actions        Stores the number of times each action was triggered.
 * @global string[]  $wp_current_filter Stores the list of current filters with the current one last.
 *
 * @param string $hook_name The name of the action to be executed.
 * @param array  $args      The arguments supplied to the functions hooked to `$hook_name`.
 */
function do_action_ref_array( $hook_name, $args ) {
	global $wp_filter, $wp_actions, $wp_current_filter;

if ( ! isset( $wp_actions[ $hook_name ] ) ) {
		$wp_actions[ $hook_name ] = 1;
	} else {
		++$wp_actions[ $hook_name ];
	}

if ( ! isset( $wp_filter[ $hook_name ] ) ) {
		if ( isset( $wp_filter['all'] ) ) {
			array_pop( $wp_current_filter );
		}

return;
	}

if ( ! isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;
	}

$wp_filter[ $hook_name ]->do_action( $args );

array_pop( $wp_current_filter );
}

/**
 * Checks if any action has been registered for a hook.
 *
 * When using the `$callback` argument, this function may return a non-boolean value
 * that evaluates to false (e.g. 0), so use the `===` operator for testing the return value.
 *
 * @since 2.5.0
 * @since 6.9.0 Added the `$priority` parameter.
 *
 * @see has_filter() This function is an alias of has_filter().
 *
 * @param string                      $hook_name The name of the action hook.
 * @param callable|string|array|false $callback  Optional. The callback to check for.
 *                                               This function 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.
 */
function has_action( $hook_name, $callback = false, $priority = false ) {
	return has_filter( $hook_name, $callback, $priority );
}

/**
 * Removes a callback function from an action hook.
 *
 * This can be used to remove default functions attached to a specific action
 * hook and possibly replace them with a substitute.
 *
 * To remove a hook, the `$callback` and `$priority` arguments must match
 * when the hook was added. This goes for both filters and actions. No warning
 * will be given on removal failure.
 *
 * @since 1.2.0
 *
 * @param string                $hook_name The action hook to which the function to be removed is hooked.
 * @param callable|string|array $callback  The name of the function which should be removed.
 *                                         This function can be called unconditionally to speculatively remove
 *                                         a callback that may or may not exist.
 * @param int                   $priority  Optional. The exact priority used when adding the original
 *                                         action callback. Default 10.
 * @return bool Whether the function is removed.
 */
function remove_action( $hook_name, $callback, $priority = 10 ) {
	return remove_filter( $hook_name, $callback, $priority );
}

/**
 * Removes all of the callback functions from an action hook.
 *
 * @since 2.7.0
 *
 * @param string    $hook_name The action to remove callbacks from.
 * @param int|false $priority  Optional. The priority number to remove them from.
 *                             Default false.
 * @return true Always returns true.
 */
function remove_all_actions( $hook_name, $priority = false ) {
	return remove_all_filters( $hook_name, $priority );
}

/**
 * Retrieves the name of the current action hook.
 *
 * @since 3.9.0
 *
 * @return string|false Hook name of the current action, false if no action is running.
 */
function current_action() {
	return current_filter();
}

/**
 * Returns whether or not an action hook is currently being processed.
 *
 * The function current_action() only returns the most recent action being executed.
 * did_action() returns the number of times an action has been fired during
 * the current request.
 *
 * This function allows detection for any action currently being executed
 * (regardless of whether it's the most recent action to fire, in the case of
 * hooks called from hook callbacks) to be verified.
 *
 * @since 3.9.0
 *
 * @see current_action()
 * @see did_action()
 *
 * @param string|null $hook_name Optional. Action hook to check. Defaults to null,
 *                               which checks if any action is currently being run.
 * @return bool Whether the action is currently in the stack.
 */
function doing_action( $hook_name = null ) {
	return doing_filter( $hook_name );
}

/**
 * Retrieves the number of times an action has been fired during the current request.
 *
 * @since 2.1.0
 *
 * @global int[] $wp_actions Stores the number of times each action was triggered.
 *
 * @param string $hook_name The name of the action hook.
 * @return int The number of times the action hook has been fired.
 */
function did_action( $hook_name ) {
	global $wp_actions;

if ( ! isset( $wp_actions[ $hook_name ] ) ) {
		return 0;
	}

return $wp_actions[ $hook_name ];
}

/**
 * Fires functions attached to a deprecated filter hook.
 *
 * When a filter hook is deprecated, the apply_filters() call is replaced with
 * apply_filters_deprecated(), which triggers a deprecation notice and then fires
 * the original filter hook.
 *
 * Note: the value and extra arguments passed to the original apply_filters() call
 * must be passed here to `$args` as an array. For example:
 *
 *     // Old filter.
 *     return apply_filters( 'wpdocs_filter', $value, $extra_arg );
 *
 *     // Deprecated.
 *     return apply_filters_deprecated( 'wpdocs_filter', array( $value, $extra_arg ), '4.9.0', 'wpdocs_new_filter' );
 *
 * @since 4.6.0
 *
 * @see _deprecated_hook()
 *
 * @param string $hook_name   The name of the filter hook.
 * @param array  $args        Array of additional function arguments to be passed to apply_filters().
 * @param string $version     The version of WordPress that deprecated the hook.
 * @param string $replacement Optional. The hook that should have been used. Default empty.
 * @param string $message     Optional. A message regarding the change. Default empty.
 * @return mixed The filtered value after all hooked functions are applied to it.
 */
function apply_filters_deprecated( $hook_name, $args, $version, $replacement = '', $message = '' ) {
	if ( ! has_filter( $hook_name ) ) {
		return $args[0];
	}

_deprecated_hook( $hook_name, $version, $replacement, $message );

return apply_filters_ref_array( $hook_name, $args );
}

/**
 * Fires functions attached to a deprecated action hook.
 *
 * When an action hook is deprecated, the do_action() call is replaced with
 * do_action_deprecated(), which triggers a deprecation notice and then fires
 * the original hook.
 *
 * @since 4.6.0
 *
 * @see _deprecated_hook()
 *
 * @param string $hook_name   The name of the action hook.
 * @param array  $args        Array of additional function arguments to be passed to do_action().
 * @param string $version     The version of WordPress that deprecated the hook.
 * @param string $replacement Optional. The hook that should have been used. Default empty.
 * @param string $message     Optional. A message regarding the change. Default empty.
 */
function do_action_deprecated( $hook_name, $args, $version, $replacement = '', $message = '' ) {
	if ( ! has_action( $hook_name ) ) {
		return;
	}

_deprecated_hook( $hook_name, $version, $replacement, $message );

do_action_ref_array( $hook_name, $args );
}

//
// Functions for handling plugins.
//

/**
 * Gets the basename of a plugin.
 *
 * This method extracts the name of a plugin from its filename.
 *
 * @since 1.5.0
 *
 * @global array $wp_plugin_paths
 *
 * @param string $file The filename of plugin.
 * @return string The name of a plugin.
 */
function plugin_basename( $file ) {
	global $wp_plugin_paths;

// $wp_plugin_paths contains normalized paths.
	$file = wp_normalize_path( $file );

arsort( $wp_plugin_paths );

foreach ( $wp_plugin_paths as $dir => $realdir ) {
		if ( str_starts_with( $file, $realdir ) ) {
			$file = $dir . substr( $file, strlen( $realdir ) );
		}
	}

$plugin_dir    = wp_normalize_path( WP_PLUGIN_DIR );
	$mu_plugin_dir = wp_normalize_path( WPMU_PLUGIN_DIR );

// Get relative path from plugins directory.
	$file = preg_replace( '#^' . preg_quote( $plugin_dir, '#' ) . '/|^' . preg_quote( $mu_plugin_dir, '#' ) . '/#', '', $file );
	$file = trim( $file, '/' );
	return $file;
}

/**
 * Register a plugin's real path.
 *
 * This is used in plugin_basename() to resolve symlinked paths.
 *
 * @since 3.9.0
 *
 * @see wp_normalize_path()
 *
 * @global array $wp_plugin_paths
 *
 * @param string $file Known path to the file.
 * @return bool Whether the path was able to be registered.
 */
function wp_register_plugin_realpath( $file ) {
	global $wp_plugin_paths;

// Normalize, but store as static to avoid recalculation of a constant value.
	static $wp_plugin_path = null, $wpmu_plugin_path = null;

if ( ! isset( $wp_plugin_path ) ) {
		$wp_plugin_path   = wp_normalize_path( WP_PLUGIN_DIR );
		$wpmu_plugin_path = wp_normalize_path( WPMU_PLUGIN_DIR );
	}

$plugin_path     = wp_normalize_path( dirname( $file ) );
	$plugin_realpath = wp_normalize_path( dirname( realpath( $file ) ) );

if ( $plugin_path === $wp_plugin_path || $plugin_path === $wpmu_plugin_path ) {
		return false;
	}

if ( $plugin_path !== $plugin_realpath ) {
		$wp_plugin_paths[ $plugin_path ] = $plugin_realpath;
	}

return true;
}

/**
 * Get the filesystem directory path (with trailing slash) for the plugin __FILE__ passed in.
 *
 * @since 2.8.0
 *
 * @param string $file The filename of the plugin (__FILE__).
 * @return string the filesystem path of the directory that contains the plugin.
 */
function plugin_dir_path( $file ) {
	return trailingslashit( dirname( $file ) );
}

/**
 * Get the URL directory path (with trailing slash) for the plugin __FILE__ passed in.
 *
 * @since 2.8.0
 *
 * @param string $file The filename of the plugin (__FILE__).
 * @return string the URL path of the directory that contains the plugin.
 */
function plugin_dir_url( $file ) {
	return trailingslashit( plugins_url( '', $file ) );
}

/**
 * Set the activation hook for a plugin.
 *
 * When a plugin is activated, the action 'activate_PLUGINNAME' hook is
 * called. In the name of this hook, PLUGINNAME is replaced with the name
 * of the plugin, including the optional subdirectory. For example, when the
 * plugin is located in wp-content/plugins/sampleplugin/sample.php, then
 * the name of this hook will become 'activate_sampleplugin/sample.php'.
 *
 * When the plugin consists of only one file and is (as by default) located at
 * wp-content/plugins/sample.php the name of this hook will be
 * 'activate_sample.php'.
 *
 * @since 2.0.0
 *
 * @param string   $file     The filename of the plugin including the path.
 * @param callable $callback The function hooked to the 'activate_PLUGIN' action.
 */
function register_activation_hook( $file, $callback ) {
	$file = plugin_basename( $file );
	add_action( 'activate_' . $file, $callback );
}

/**
 * Sets the deactivation hook for a plugin.
 *
 * When a plugin is deactivated, the action 'deactivate_PLUGINNAME' hook is
 * called. In the name of this hook, PLUGINNAME is replaced with the name
 * of the plugin, including the optional subdirectory. For example, when the
 * plugin is located in wp-content/plugins/sampleplugin/sample.php, then
 * the name of this hook will become 'deactivate_sampleplugin/sample.php'.
 *
 * When the plugin consists of only one file and is (as by default) located at
 * wp-content/plugins/sample.php the name of this hook will be
 * 'deactivate_sample.php'.
 *
 * @since 2.0.0
 *
 * @param string   $file     The filename of the plugin including the path.
 * @param callable $callback The function hooked to the 'deactivate_PLUGIN' action.
 */
function register_deactivation_hook( $file, $callback ) {
	$file = plugin_basename( $file );
	add_action( 'deactivate_' . $file, $callback );
}

/**
 * Sets the uninstallation hook for a plugin.
 *
 * Registers the uninstall hook that will be called when the user clicks on the
 * uninstall link that calls for the plugin to uninstall itself. The link won't
 * be active unless the plugin hooks into the action.
 *
 * The plugin should not run arbitrary code outside of functions, when
 * registering the uninstall hook. In order to run using the hook, the plugin
 * will have to be included, which means that any code laying outside of a
 * function will be run during the uninstallation process. The plugin should not
 * hinder the uninstallation process.
 *
 * If the plugin can not be written without running code within the plugin, then
 * the plugin should create a file named 'uninstall.php' in the base plugin
 * folder. This file will be called, if it exists, during the uninstallation process
 * bypassing the uninstall hook. The plugin, when using the 'uninstall.php'
 * should always check for the 'WP_UNINSTALL_PLUGIN' constant, before
 * executing.
 *
 * @since 2.7.0
 *
 * @param string   $file     Plugin file.
 * @param callable $callback The callback to run when the hook is called. Must be
 *                           a static method or function.
 */
function register_uninstall_hook( $file, $callback ) {
	if ( is_array( $callback ) && is_object( $callback[0] ) ) {
		_doing_it_wrong( __FUNCTION__, __( 'Only a static class method or function can be used in an uninstall hook.' ), '3.1.0' );
		return;
	}

/*
	 * The option should not be autoloaded, because it is not needed in most
	 * cases. Emphasis should be put on using the 'uninstall.php' way of
	 * uninstalling the plugin.
	 */
	$uninstallable_plugins = (array) get_option( 'uninstall_plugins' );
	$plugin_basename       = plugin_basename( $file );

if ( ! isset( $uninstallable_plugins[ $plugin_basename ] ) || $uninstallable_plugins[ $plugin_basename ] !== $callback ) {
		$uninstallable_plugins[ $plugin_basename ] = $callback;
		update_option( 'uninstall_plugins', $uninstallable_plugins );
	}
}

/**
 * Calls the 'all' hook, which will process the functions hooked into it.
 *
 * The 'all' hook passes all of the arguments or parameters that were used for
 * the hook, which this function was called for.
 *
 * This function is used internally for apply_filters(), do_action(), and
 * do_action_ref_array() and is not meant to be used from outside those
 * functions. This function does not check for the existence of the all hook, so
 * it will fail unless the all hook exists prior to this function call.
 *
 * @since 2.5.0
 * @access private
 *
 * @global WP_Hook[] $wp_filter Stores all of the filters and actions.
 *
 * @param array $args The collected parameters from the hook that was called.
 */
function _wp_call_all_hook( $args ) {
	global $wp_filter;

$wp_filter['all']->do_all_hook( $args );
}

/**
 * Builds a unique string ID for a hook callback function.
 *
 * Functions and static method callbacks are just returned as strings and
 * shouldn't have any speed penalty.
 *
 * @link https://core.trac.wordpress.org/ticket/3875
 *
 * @since 2.2.3
 * @since 5.3.0 Removed workarounds for spl_object_hash().
 *              `$hook_name` and `$priority` are no longer used,
 *              and no longer returns false, but can still return void for invalid callbacks.
 * @since 6.9.0 Returns explicit null if an invalid callback is supplied.
 * @since 7.1.0 Uses spl_object_id() instead of spl_object_hash() for performance.
 *
 * @access private
 *
 * @param string   $hook_name Unused. The name of the filter to build ID for.
 * @param callable $callback  The callback to generate ID for. The callback may
 *                            or may not exist.
 * @param int      $priority  Unused. The order in which the functions
 *                            associated with a particular action are executed.
 * @return string|null Unique function ID for usage as array key, or null if it couldn't be determined.
 */
function _wp_filter_build_unique_id( $hook_name, $callback, $priority ): ?string {
	if ( is_string( $callback ) ) {
		return $callback;
	}

if ( is_object( $callback ) ) {
		return (string) spl_object_id( $callback );
	}

if ( ! isset( $callback[1] ) || ! is_string( $callback[1] ) ) {
		return null;
	}

if ( is_object( $callback[0] ) ) {
		// Object class calling.
		return ( (string) spl_object_id( $callback[0] ) ) . $callback[1];
	} elseif ( is_string( $callback[0] ) ) {
		// Static calling.
		return $callback[0] . '::' . $callback[1];
	}

return null;
}

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