Gecko [ ifk.uw.edu.pl ]

Name	Size	Permission
ID3	[ DIR ]	drwxr-xr-x
IXR	[ DIR ]	drwxr-xr-x
Requests	[ DIR ]	drwxr-xr-x
SimplePie	[ DIR ]	drwxr-xr-x
Text	[ DIR ]	drwxr-xr-x
certificates	[ DIR ]	drwxr-xr-x
css	[ DIR ]	drwxr-xr-x
customize	[ DIR ]	drwxr-xr-x
fonts	[ DIR ]	drwxr-xr-x
images	[ DIR ]	drwxr-xr-x
js	[ DIR ]	drwxr-xr-x
pomo	[ DIR ]	drwxr-xr-x
random_compat	[ DIR ]	drwxr-xr-x
rest-api	[ DIR ]	drwxr-xr-x
theme-compat	[ DIR ]	drwxr-xr-x
widgets	[ DIR ]	drwxr-xr-x
admin-bar.php	27.98 KB	-rw-r--r--
atomlib.php	11.56 KB	-rw-r--r--
author-template.php	15.75 KB	-rw-r--r--
bookmark-template.php	11.42 KB	-rw-r--r--
bookmark.php	13.35 KB	-rw-r--r--
cache.php	21.09 KB	-rw-r--r--
canonical.php	26.94 KB	-rw-r--r--
capabilities.php	27.55 KB	-rw-r--r--
category-template.php	50.12 KB	-rw-r--r--
category.php	11.7 KB	-rw-r--r--
class-IXR.php	2.51 KB	-rw-r--r--
class-feed.php	522 B	-rw-r--r--
class-http.php	35.32 KB	-rw-r--r--
class-json.php	39.52 KB	-rw-r--r--
class-oembed.php	32.34 KB	-rw-r--r--
class-phpass.php	7.15 KB	-rw-r--r--
class-phpmailer.php	143.34 KB	-rw-r--r--
class-pop3.php	20.43 KB	-rw-r--r--
class-requests.php	29.09 KB	-rw-r--r--
class-simplepie.php	87.17 KB	-rw-r--r--
class-smtp.php	38.55 KB	-rw-r--r--
class-snoopy.php	36.9 KB	-rw-r--r--
class-walker-category-dropdown...	2.05 KB	-rw-r--r--
class-walker-category.php	6.49 KB	-rw-r--r--
class-walker-comment.php	10.91 KB	-rw-r--r--
class-walker-nav-menu.php	8.2 KB	-rw-r--r--
class-walker-page-dropdown.php	2.23 KB	-rw-r--r--
class-walker-page.php	6.56 KB	-rw-r--r--
class-wp-admin-bar.php	16.57 KB	-rw-r--r--
class-wp-ajax-response.php	4.91 KB	-rw-r--r--
class-wp-comment-query.php	40.76 KB	-rw-r--r--
class-wp-comment.php	8.73 KB	-rw-r--r--
class-wp-customize-control.php	24.4 KB	-rw-r--r--
class-wp-customize-manager.php	192.6 KB	-rw-r--r--
class-wp-customize-nav-menus.p...	52.31 KB	-rw-r--r--
class-wp-customize-panel.php	9.35 KB	-rw-r--r--
class-wp-customize-section.php	9.96 KB	-rw-r--r--
class-wp-customize-setting.php	27.47 KB	-rw-r--r--
class-wp-customize-widgets.php	64.2 KB	-rw-r--r--
class-wp-dependency.php	1.51 KB	-rw-r--r--
class-wp-editor.php	59.28 KB	-rw-r--r--
class-wp-embed.php	14.17 KB	-rw-r--r--
class-wp-error.php	4.48 KB	-rw-r--r--
class-wp-feed-cache-transient....	2.48 KB	-rw-r--r--
class-wp-feed-cache.php	745 B	-rw-r--r--
class-wp-hook.php	13.72 KB	-rw-r--r--
class-wp-http-cookie.php	6.3 KB	-rw-r--r--
class-wp-http-curl.php	11.41 KB	-rw-r--r--
class-wp-http-encoding.php	6.29 KB	-rw-r--r--
class-wp-http-ixr-client.php	3.17 KB	-rw-r--r--
class-wp-http-proxy.php	5.82 KB	-rw-r--r--
class-wp-http-requests-hooks.p...	1.83 KB	-rw-r--r--
class-wp-http-requests-respons...	4.17 KB	-rw-r--r--
class-wp-http-response.php	2.8 KB	-rw-r--r--
class-wp-http-streams.php	14.64 KB	-rw-r--r--
class-wp-image-editor-gd.php	12.62 KB	-rw-r--r--
class-wp-image-editor-imagick....	21.17 KB	-rw-r--r--
class-wp-image-editor.php	11.43 KB	-rw-r--r--
class-wp-list-util.php	6.22 KB	-rw-r--r--
class-wp-locale-switcher.php	4.94 KB	-rw-r--r--
class-wp-locale.php	14.21 KB	-rw-r--r--
class-wp-matchesmapregex.php	1.75 KB	-rw-r--r--
class-wp-meta-query.php	21.73 KB	-rw-r--r--
class-wp-metadata-lazyloader.p...	5.25 KB	-rw-r--r--
class-wp-network-query.php	16.72 KB	-rw-r--r--
class-wp-network.php	11.84 KB	-rw-r--r--
class-wp-oembed-controller.php	5.46 KB	-rw-r--r--
class-wp-post-type.php	17.81 KB	-rw-r--r--
class-wp-post.php	6.21 KB	-rw-r--r--
class-wp-query.php	121.06 KB	-rw-r--r--
class-wp-rewrite.php	57.53 KB	-rw-r--r--
class-wp-role.php	2.55 KB	-rw-r--r--
class-wp-roles.php	8 KB	-rw-r--r--
class-wp-session-tokens.php	7.17 KB	-rw-r--r--
class-wp-simplepie-file.php	2.22 KB	-rw-r--r--
class-wp-simplepie-sanitize-ks...	1.73 KB	-rw-r--r--
class-wp-site-query.php	22.64 KB	-rw-r--r--
class-wp-site.php	7.15 KB	-rw-r--r--
class-wp-tax-query.php	18.75 KB	-rw-r--r--
class-wp-taxonomy.php	9.76 KB	-rw-r--r--
class-wp-term-query.php	33.36 KB	-rw-r--r--
class-wp-term.php	5.15 KB	-rw-r--r--
class-wp-text-diff-renderer-in...	712 B	-rw-r--r--
class-wp-text-diff-renderer-ta...	14.84 KB	-rw-r--r--
class-wp-theme.php	46.76 KB	-rw-r--r--
class-wp-user-meta-session-tok...	2.85 KB	-rw-r--r--
class-wp-user-query.php	28.83 KB	-rw-r--r--
class-wp-user.php	20.19 KB	-rw-r--r--
class-wp-walker.php	12.09 KB	-rw-r--r--
class-wp-widget-factory.php	3.66 KB	-rw-r--r--
class-wp-widget.php	17.24 KB	-rw-r--r--
class-wp-xmlrpc-server.php	196.66 KB	-rw-r--r--
class-wp.php	23.2 KB	-rw-r--r--
class-wpglobus-plus-acf.php	1.57 KB	-rw-r--r--
class-wpglobus-plus-menu.php	2.48 KB	-rw-r--r--
class-wpglobus-plus-publish.ph...	15.03 KB	-rw-r--r--
class-wpglobus-plus-slug-acf.p...	1.14 KB	-rw-r--r--
class-wpglobus-plus-slug.php	22.27 KB	-rw-r--r--
class-wpglobus-plus-tablepress...	2.97 KB	-rw-r--r--
class-wpglobus-plus-wpglobedit...	7.36 KB	-rw-r--r--
class-wpglobus-plus-wpseo23.ph...	17.62 KB	-rw-r--r--
class-wpglobus-plus-yoastseo30...	1.25 KB	-rw-r--r--
class.wp-dependencies.php	10.92 KB	-rw-r--r--
class.wp-scripts.php	13.83 KB	-rw-r--r--
class.wp-styles.php	9.56 KB	-rw-r--r--
comment-template.php	86.15 KB	-rw-r--r--
comment.php	108.76 KB	-rw-r--r--
compat.php	15.85 KB	-rw-r--r--
cron.php	16.08 KB	-rw-r--r--
date.php	34.18 KB	-rw-r--r--
default-constants.php	9.34 KB	-rw-r--r--
default-filters.php	26.61 KB	-rw-r--r--
default-widgets.php	2.13 KB	-rw-r--r--
deprecated.php	110.57 KB	-rw-r--r--
embed-template.php	344 B	-rw-r--r--
embed.php	43.31 KB	-rw-r--r--
feed-atom-comments.php	5.23 KB	-rw-r--r--
feed-atom.php	3.02 KB	-rw-r--r--
feed-rdf.php	2.61 KB	-rw-r--r--
feed-rss.php	1.22 KB	-rw-r--r--
feed-rss2-comments.php	3.97 KB	-rw-r--r--
feed-rss2.php	3.68 KB	-rw-r--r--
feed.php	19.09 KB	-rw-r--r--
formatting.php	264.84 KB	-rw-r--r--
functions.php	183.38 KB	-rw-r--r--
functions.wp-scripts.php	11.21 KB	-rw-r--r--
functions.wp-styles.php	7.89 KB	-rw-r--r--
general-template.php	135.77 KB	-rw-r--r--
http.php	21.65 KB	-rw-r--r--
kses.php	48.93 KB	-rw-r--r--
l10n.php	42.46 KB	-rw-r--r--
link-template.php	133.25 KB	-rw-r--r--
load.php	33.11 KB	-rw-r--r--
locale.php	141 B	-rw-r--r--
media-template.php	45.03 KB	-rw-r--r--
media.php	137.07 KB	-rw-r--r--
meta.php	41.76 KB	-rw-r--r--
ms-blogs.php	38.26 KB	-rw-r--r--
ms-default-constants.php	4.6 KB	-rw-r--r--
ms-default-filters.php	4.54 KB	-rw-r--r--
ms-deprecated.php	15.32 KB	-rw-r--r--
ms-files.php	2.56 KB	-rw-r--r--
ms-functions.php	89 KB	-rw-r--r--
ms-load.php	18.8 KB	-rw-r--r--
ms-settings.php	3.99 KB	-rw-r--r--
nav-menu-template.php	20.38 KB	-rw-r--r--
nav-menu.php	38.6 KB	-rw-r--r--
option.php	66.16 KB	-rw-r--r--
pluggable-deprecated.php	6.12 KB	-rw-r--r--
pluggable.php	89.97 KB	-rw-r--r--
plugin.php	30.93 KB	-rw-r--r--
post-formats.php	6.81 KB	-rw-r--r--
post-template.php	57.35 KB	-rw-r--r--
post-thumbnail-template.php	8.02 KB	-rw-r--r--
post.php	214.7 KB	-rw-r--r--
query.php	25.02 KB	-rw-r--r--
registration-functions.php	178 B	-rw-r--r--
registration.php	178 B	-rw-r--r--
rest-api.php	37.63 KB	-rw-r--r--
revision.php	20.81 KB	-rw-r--r--
rewrite.php	17.09 KB	-rw-r--r--
rss-functions.php	191 B	-rw-r--r--
rss.php	22.66 KB	-rw-r--r--
script-loader.php	78.28 KB	-rw-r--r--
session.php	242 B	-rw-r--r--
shortcodes.php	19.96 KB	-rw-r--r--
spl-autoload-compat.php	2.51 KB	-rw-r--r--
taxonomy.php	147.09 KB	-rw-r--r--
template-loader.php	2.83 KB	-rw-r--r--
template.php	19.33 KB	-rw-r--r--
theme.php	97.44 KB	-rw-r--r--
update.php	24.11 KB	-rw-r--r--
user.php	118.2 KB	-rw-r--r--
vars.php	5.45 KB	-rw-r--r--
version.php	649 B	-rw-r--r--
widgets.php	54.14 KB	-rw-r--r--
wlwmanifest.xml	1.02 KB	-rw-r--r--
wp-db.php	97.14 KB	-rw-r--r--
wp-diff.php	661 B	-rw-r--r--
wpglobus-plus-acf.php	296 B	-rw-r--r--
wpglobus-plus-main.php	10.57 KB	-rw-r--r--
wpglobus-plus-menu.php	205 B	-rw-r--r--
wpglobus-plus-publish.php	217 B	-rw-r--r--
wpglobus-plus-slug.php	360 B	-rw-r--r--
wpglobus-plus-tablepress-funct...	1.14 KB	-rw-r--r--
wpglobus-plus-tablepress.php	226 B	-rw-r--r--
wpglobus-plus-wpglobeditor.php	2.29 KB	-rw-r--r--
wpglobus-plus-wpseo.php	884 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
 */
final class WP_Hook implements Iterator, ArrayAccess {

/**
	 * Hook callbacks.
	 *
	 * @since 4.7.0
	 * @var array
	 */
	public $callbacks = array();

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

/**
	 * The current priority of actively running iterations of a hook.
	 *
	 * @since 4.7.0
	 * @var array
	 */
	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 current doing an action, rather than a filter.
	 *
	 * @since 4.7.0
	 * @var bool
	 */
	private $doing_action = false;

/**
	 * Hooks a function or method to a specific filter action.
	 *
	 * @since 4.7.0
	 *
	 * @param string   $tag             The name of the filter to hook the $function_to_add callback to.
	 * @param callable $function_to_add The callback to be run when the filter is applied.
	 * @param int      $priority        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.
	 * @param int      $accepted_args   The number of arguments the function accepts.
	 */
	public function add_filter( $tag, $function_to_add, $priority, $accepted_args ) {
		$idx = _wp_filter_build_unique_id( $tag, $function_to_add, $priority );
		$priority_existed = isset( $this->callbacks[ $priority ] );

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

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

/**
	 * Handles reseting callback priority keys mid-iteration.
	 *
	 * @since 4.7.0
	 *
	 * @param bool|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 = array_keys( $this->callbacks );

// 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 );
	}

/**
	 * Unhooks a function or method from a specific filter action.
	 *
	 * @since 4.7.0
	 *
	 * @param string   $tag                The filter hook to which the function to be removed is hooked. Used
	 *                                     for building the callback ID when SPL is not available.
	 * @param callable $function_to_remove The callback to be removed from running when the filter is applied.
	 * @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( $tag, $function_to_remove, $priority ) {
		$function_key = _wp_filter_build_unique_id( $tag, $function_to_remove, $priority );

$exists = isset( $this->callbacks[ $priority ][ $function_key ] );
		if ( $exists ) {
			unset( $this->callbacks[ $priority ][ $function_key ] );
			if ( ! $this->callbacks[ $priority ] ) {
				unset( $this->callbacks[ $priority ] );
				if ( $this->nesting_level > 0 ) {
					$this->resort_active_iterations();
				}
			}
		}
		return $exists;
	}

/**
	 * Checks if a specific action has been registered for this hook.
	 *
	 * @since 4.7.0
	 *
	 * @param string        $tag               Optional. The name of the filter hook. Used for building
	 *                                         the callback ID when SPL is not available. Default empty.
	 * @param callable|bool $function_to_check Optional. The callback to check for. Default false.
	 * @return bool|int The priority of that hook is returned, or false if the function is not attached.
	 */
	public function has_filter( $tag = '', $function_to_check = false ) {
		if ( false === $function_to_check ) {
			return $this->has_filters();
		}

$function_key = _wp_filter_build_unique_id( $tag, $function_to_check, false );
		if ( ! $function_key ) {
			return false;
		}

foreach ( $this->callbacks as $priority => $callbacks ) {
			if ( isset( $callbacks[ $function_key ] ) ) {
				return $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|bool $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();
		} else if ( isset( $this->callbacks[ $priority ] ) ) {
			unset( $this->callbacks[ $priority ] );
		}

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

/**
	 * Calls the callback functions added to a filter hook.
	 *
	 * @since 4.7.0
	 *
	 * @param mixed $value The value to filter.
	 * @param array $args  Arguments to pass to callbacks.
	 * @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 ] = array_keys( $this->callbacks );
		$num_args = count( $args );

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

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

// Avoid the array_slice if possible.
				if ( $the_['accepted_args'] == 0 ) {
					$value = call_user_func_array( $the_['function'], array() );
				} elseif ( $the_['accepted_args'] >= $num_args ) {
					$value = call_user_func_array( $the_['function'], $args );
				} else {
					$value = call_user_func_array( $the_['function'], array_slice( $args, 0, (int)$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;
	}

/**
	 * Executes the callback functions hooked on a specific action hook.
	 *
	 * @since 4.7.0
	 *
	 * @param mixed $args Arguments to pass to the hook callbacks.
	 */
	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 ] = array_keys( $this->callbacks );

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.
	 *
	 * @since 4.7.0
	 * @static
	 *
	 * @param array $filters Filters to normalize.
	 * @return WP_Hook[] Array of normalized filters.
	 */
	public static function build_preinitialized_hooks( $filters ) {
		/** @var WP_Hook[] $normalized */
		$normalized = array();

foreach ( $filters as $tag => $callback_groups ) {
			if ( is_object( $callback_groups ) && $callback_groups instanceof WP_Hook ) {
				$normalized[ $tag ] = $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( $tag, $cb['function'], $priority, $cb['accepted_args'] );
				}
			}
			$normalized[ $tag ] = $hook;
		}
		return $normalized;
	}

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

/**
	 * Retrieves a value at a specified offset.
	 *
	 * @since 4.7.0
	 *
	 * @link https://secure.php.net/manual/en/arrayaccess.offsetget.php
	 *
	 * @param mixed $offset The offset to retrieve.
	 * @return mixed If set, the value at the specified offset, null otherwise.
	 */
	public function offsetGet( $offset ) {
		return isset( $this->callbacks[ $offset ] ) ? $this->callbacks[ $offset ] : null;
	}

/**
	 * Sets a value at a specified offset.
	 *
	 * @since 4.7.0
	 *
	 * @link https://secure.php.net/manual/en/arrayaccess.offsetset.php
	 *
	 * @param mixed $offset The offset to assign the value to.
	 * @param mixed $value The value to set.
	 */
	public function offsetSet( $offset, $value ) {
		if ( is_null( $offset ) ) {
			$this->callbacks[] = $value;
		} else {
			$this->callbacks[ $offset ] = $value;
		}
	}

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

/**
	 * Returns the current element.
	 *
	 * @since 4.7.0
	 *
	 * @link https://secure.php.net/manual/en/iterator.current.php
	 *
	 * @return array Of callbacks at current priority.
	 */
	public function current() {
		return current( $this->callbacks );
	}

/**
	 * Moves forward to the next element.
	 *
	 * @since 4.7.0
	 *
	 * @link https://secure.php.net/manual/en/iterator.next.php
	 *
	 * @return array Of callbacks at next priority.
	 */
	public function next() {
		return next( $this->callbacks );
	}

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

/**
	 * Checks if current position is valid.
	 *
	 * @since 4.7.0
	 *
	 * @link https://secure.php.net/manual/en/iterator.valid.php
	 *
	 * @return boolean
	 */
	public function valid() {
		return key( $this->callbacks ) !== null;
	}

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

}

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