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Hooks: Add the new class `WP_Hook`, and modify hook handling to make use of it. 

Filters and actions have been the basis of WordPress' plugin functionality since time immemorial, they've always been a reliable method for acting upon the current state of WordPress, and will continue to be so.

Over the years, however, edge cases have cropped up. Particularly when it comes to recursively executing hooks, or a hook adding and removing itself, the existing implementation struggled to keep up with more complex use cases.

And so, we introduce `WP_Hook`. By changing `$wp_filter` from an array of arrays, to an array of objects, we reduce the complexity of the hook handling code, as the processing code (see `::apply_filters()`) only needs to be aware of itself, rather than the state of all hooks. At the same time, we're able te handle more complex use cases, as the object can more easily keep track of its own state than an array ever could.

Props jbrinley for the original architecture and design of this patch.
Props SergeyBiryukov, cheeserolls, Denis-de-Bernardy, leewillis77, wonderboymusic, nacin, jorbin, DrewAPicture, ocean90, dougwollison, khag7, pento, noplanman and aaroncampbell for their testing, suggestions, contributions, patch maintenance, cajoling and patience as we got through this.
Fixes #17817.


Built from https://develop.svn.wordpress.org/trunk@38571


git-svn-id: http://core.svn.wordpress.org/trunk@38514 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Gary Pendergast 2016-09-08 03:55:31 +00:00
parent 8bec516c18
commit 5a632be944
3 changed files with 557 additions and 136 deletions
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516
wp-includes/class-wp-hook.php Normal file
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@ -0,0 +1,516 @@
<?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
* @access public
* @var array
*/
public $callbacks = array();
/**
* The priority keys of actively running iterations of a hook.
*
* @since 4.7.0
* @access private
* @var array
*/
private $iterations = array();
/**
* The current priority of actively running iterations of a hook.
*
* @since 4.7.0
* @access private
* @var array
*/
private $current_priority = array();
/**
* Number of levels this hook can be recursively called.
*
* @since 4.7.0
* @access private
* @var int
*/
private $nesting_level = 0;
/**
* Flag for if we're current doing an action, rather than a filter.
*
* @since 4.7.0
* @access private
* @var boolean
*/
private $doing_action = false;
/**
* Hooks a function or method to a specific filter action.
*
* @since 4.7.0
* @access public
*
* @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
* @access private
*
* @param bool|int $new_priority The priority of the new filter being added. Default false, for no priority being added.
* @param bool $priority_existed Flag for whether the priority already existed before the new filter was added.
*/
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
* @access public
*
* @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
* @access public
*
* @param callable|bool $function_to_check Optional. The callback to check for. Default false.
* @param string $tag Optional. The name of the filter hook. Default empty.
* Used for building the callback ID when SPL is not available.
* @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
* @access public
*
* @return bool True if callbacks have been registered for the current hook, false otherwise.
*/
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
* @access public
*
* @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
* @access public
*
* @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
* @access public
*
* @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
* @access public
*
* @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--;
}
/**
* Normalizes filters setup before WordPress has initialized to WP_Hook objects.
*
* @since 4.7.0
* @access public
* @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
* @access public
*
* @link http://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
* @access public
*
* @link http://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
* @access public
*
* @link http://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
* @access public
*
* @link http://php.net/manual/en/arrayaccess.offsetunset.php
*
* @param mixed $offset The offset to unset.
*/
public function offsetUnset( $offset ) {
unset( $this->callbacks[ $offset ] );
}
/**
* Return the current element
*
* @since 4.7.0
* @access public
*
* @link http://php.net/manual/en/iterator.current.php
*
* @return array Of callbacks at current priority.
*/
public function current() {
return current( $this->callbacks );
}
/**
* Move forward to the next element
*
* @since 4.7.0
* @access public
*
* @link http://php.net/manual/en/iterator.next.php
*
* @return array Of callbacks at next priority.
*/
public function next() {
return next( $this->callbacks );
}
/**
* Return the key of the current element
*
* @since 4.7.0
* @access public
*
* @link http://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
* @access public
*
* @link http://php.net/manual/en/iterator.valid.php
*
* @return boolean
*/
public function valid() {
return key( $this->callbacks ) !== null;
}
/**
* Rewind the Iterator to the first element
*
* @since 4.7.0
* @access public
*
* @link http://php.net/manual/en/iterator.rewind.php
*/
public function rewind() {
reset( $this->callbacks );
}
}

175
wp-includes/plugin.php
View File

@ -22,17 +22,20 @@
*/
// Initialize the filter globals.
global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
require( ABSPATH . WPINC . '/class-wp-hook.php' );
if ( ! isset( $wp_filter ) )
/** @var WP_Hook[] $wp_filter */
global $wp_filter, $wp_actions, $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( $merged_filters ) )
$merged_filters = array();
if ( ! isset( $wp_current_filter ) )
$wp_current_filter = array();
@ -89,8 +92,6 @@ if ( ! isset( $wp_current_filter ) )
* @since 0.71
*
* @global array $wp_filter A multidimensional array of all hooks and the callbacks hooked to them.
* @global array $merged_filters Tracks the tags that need to be merged for later. If the hook is added,
* it doesn't need to run through that process.
*
* @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.
@ -103,11 +104,11 @@ if ( ! isset( $wp_current_filter ) )
* @return true
*/
function add_filter( $tag, $function_to_add, $priority = 10, $accepted_args = 1 ) {
global $wp_filter, $merged_filters;
$idx = _wp_filter_build_unique_id($tag, $function_to_add, $priority);
$wp_filter[$tag][$priority][$idx] = array('function' => $function_to_add, 'accepted_args' => $accepted_args);
unset( $merged_filters[ $tag ] );
global $wp_filter;
if ( ! isset( $wp_filter[ $tag ] ) ) {
$wp_filter[ $tag ] = new WP_Hook();
}
$wp_filter[ $tag ]->add_filter( $tag, $function_to_add, $priority, $accepted_args );
return true;
}
@ -128,38 +129,13 @@ function add_filter( $tag, $function_to_add, $priority = 10, $accepted_args = 1
* return value.
*/
function has_filter($tag, $function_to_check = false) {
// Don't reset the internal array pointer
$wp_filter = $GLOBALS['wp_filter'];
global $wp_filter;
$has = ! empty( $wp_filter[ $tag ] );
// Make sure at least one priority has a filter callback
if ( $has ) {
$exists = false;
foreach ( $wp_filter[ $tag ] as $callbacks ) {
if ( ! empty( $callbacks ) ) {
$exists = true;
break;
}
}
if ( ! $exists ) {
$has = false;
}
}
if ( false === $function_to_check || false === $has )
return $has;
if ( !$idx = _wp_filter_build_unique_id($tag, $function_to_check, false) )
if ( ! isset( $wp_filter[ $tag ] ) ) {
return false;
foreach ( (array) array_keys($wp_filter[$tag]) as $priority ) {
if ( isset($wp_filter[$tag][$priority][$idx]) )
return $priority;
}
return false;
return $wp_filter[ $tag ]->has_filter( $tag, $function_to_check );
}
/**
@ -190,7 +166,6 @@ function has_filter($tag, $function_to_check = false) {
* @since 0.71
*
* @global array $wp_filter Stores all of the filters.
* @global array $merged_filters Merges the filter hooks using this function.
* @global array $wp_current_filter Stores the list of current filters with the current one last.
*
* @param string $tag The name of the filter hook.
@ -199,7 +174,7 @@ function has_filter($tag, $function_to_check = false) {
* @return mixed The filtered value after all hooked functions are applied to it.
*/
function apply_filters( $tag, $value ) {
global $wp_filter, $merged_filters, $wp_current_filter;
global $wp_filter, $wp_current_filter;
$args = array();
@ -219,29 +194,17 @@ function apply_filters( $tag, $value ) {
if ( !isset($wp_filter['all']) )
$wp_current_filter[] = $tag;
// Sort.
if ( !isset( $merged_filters[ $tag ] ) ) {
ksort($wp_filter[$tag]);
$merged_filters[ $tag ] = true;
}
reset( $wp_filter[ $tag ] );
if ( empty($args) )
$args = func_get_args();
do {
foreach ( (array) current($wp_filter[$tag]) as $the_ )
if ( !is_null($the_['function']) ){
$args[1] = $value;
$value = call_user_func_array($the_['function'], array_slice($args, 1, (int) $the_['accepted_args']));
}
// don't pass the tag name to WP_Hook
array_shift( $args );
} while ( next($wp_filter[$tag]) !== false );
$filtered = $wp_filter[ $tag ]->apply_filters( $value, $args );
array_pop( $wp_current_filter );
return $value;
return $filtered;
}
/**
@ -253,7 +216,6 @@ function apply_filters( $tag, $value ) {
* functions hooked to `$tag` are supplied using an array.
*
* @global array $wp_filter Stores all of the filters
* @global array $merged_filters Merges the filter hooks using this function.
* @global array $wp_current_filter Stores the list of current filters with the current one last
*
* @param string $tag The name of the filter hook.
@ -261,7 +223,7 @@ function apply_filters( $tag, $value ) {
* @return mixed The filtered value after all hooked functions are applied to it.
*/
function apply_filters_ref_array($tag, $args) {
global $wp_filter, $merged_filters, $wp_current_filter;
global $wp_filter, $wp_current_filter;
// Do 'all' actions first
if ( isset($wp_filter['all']) ) {
@ -279,24 +241,11 @@ function apply_filters_ref_array($tag, $args) {
if ( !isset($wp_filter['all']) )
$wp_current_filter[] = $tag;
// Sort
if ( !isset( $merged_filters[ $tag ] ) ) {
ksort($wp_filter[$tag]);
$merged_filters[ $tag ] = true;
}
reset( $wp_filter[ $tag ] );
do {
foreach ( (array) current($wp_filter[$tag]) as $the_ )
if ( !is_null($the_['function']) )
$args[0] = call_user_func_array($the_['function'], array_slice($args, 0, (int) $the_['accepted_args']));
} while ( next($wp_filter[$tag]) !== false );
$filtered = $wp_filter[ $tag ]->apply_filters( $args[0], $args );
array_pop( $wp_current_filter );
return $args[0];
return $filtered;
}
/**
@ -313,7 +262,6 @@ function apply_filters_ref_array($tag, $args) {
* @since 1.2.0
*
* @global array $wp_filter Stores all of the filters
* @global array $merged_filters Merges the filter hooks using this function.
*
* @param string $tag The filter hook to which the function to be removed is hooked.
* @param callable $function_to_remove The name of the function which should be removed.
@ -321,19 +269,14 @@ function apply_filters_ref_array($tag, $args) {
* @return bool Whether the function existed before it was removed.
*/
function remove_filter( $tag, $function_to_remove, $priority = 10 ) {
$function_to_remove = _wp_filter_build_unique_id( $tag, $function_to_remove, $priority );
global $wp_filter;
$r = isset( $GLOBALS['wp_filter'][ $tag ][ $priority ][ $function_to_remove ] );
if ( true === $r ) {
unset( $GLOBALS['wp_filter'][ $tag ][ $priority ][ $function_to_remove ] );
if ( empty( $GLOBALS['wp_filter'][ $tag ][ $priority ] ) ) {
unset( $GLOBALS['wp_filter'][ $tag ][ $priority ] );
$r = false;
if ( isset( $wp_filter[ $tag ] ) ) {
$r = $wp_filter[ $tag ]->remove_filter( $tag, $function_to_remove, $priority );
if ( ! $wp_filter[ $tag ]->callbacks ) {
unset( $wp_filter[ $tag ] );
}
if ( empty( $GLOBALS['wp_filter'][ $tag ] ) ) {
$GLOBALS['wp_filter'][ $tag ] = array();
}
unset( $GLOBALS['merged_filters'][ $tag ] );
}
return $r;
@ -344,26 +287,22 @@ function remove_filter( $tag, $function_to_remove, $priority = 10 ) {
*
* @since 2.7.0
*
* @global array $wp_filter Stores all of the filters
* @global array $merged_filters Merges the filter hooks using this function.
* @global array $wp_filter Stores all of the filters
*
* @param string $tag The filter to remove hooks from.
* @param int|bool $priority Optional. The priority number to remove. Default false.
* @return true True when finished.
*/
function remove_all_filters( $tag, $priority = false ) {
global $wp_filter, $merged_filters;
global $wp_filter;
if ( isset( $wp_filter[ $tag ]) ) {
if ( false === $priority ) {
$wp_filter[ $tag ] = array();
} elseif ( isset( $wp_filter[ $tag ][ $priority ] ) ) {
$wp_filter[ $tag ][ $priority ] = array();
$wp_filter[ $tag ]->remove_all_filters( $priority );
if ( ! $wp_filter[ $tag ]->has_filters() ) {
unset( $wp_filter[ $tag ] );
}
}
unset( $merged_filters[ $tag ] );
return true;
}
@ -473,7 +412,6 @@ function add_action($tag, $function_to_add, $priority = 10, $accepted_args = 1)
*
* @global array $wp_filter Stores all of the filters
* @global array $wp_actions Increments the amount of times action was triggered.
* @global array $merged_filters Merges the filter hooks using this function.
* @global array $wp_current_filter Stores the list of current filters with the current one last
*
* @param string $tag The name of the action to be executed.
@ -481,7 +419,7 @@ function add_action($tag, $function_to_add, $priority = 10, $accepted_args = 1)
* functions hooked to the action. Default empty.
*/
function do_action($tag, $arg = '') {
global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
global $wp_filter, $wp_actions, $wp_current_filter;
if ( ! isset($wp_actions[$tag]) )
$wp_actions[$tag] = 1;
@ -512,20 +450,7 @@ function do_action($tag, $arg = '') {
for ( $a = 2, $num = func_num_args(); $a < $num; $a++ )
$args[] = func_get_arg($a);
// Sort
if ( !isset( $merged_filters[ $tag ] ) ) {
ksort($wp_filter[$tag]);
$merged_filters[ $tag ] = true;
}
reset( $wp_filter[ $tag ] );
do {
foreach ( (array) current($wp_filter[$tag]) as $the_ )
if ( !is_null($the_['function']) )
call_user_func_array($the_['function'], array_slice($args, 0, (int) $the_['accepted_args']));
} while ( next($wp_filter[$tag]) !== false );
$wp_filter[ $tag ]->do_action( $args );
array_pop($wp_current_filter);
}
@ -558,14 +483,13 @@ function did_action($tag) {
* functions hooked to $tag< are supplied using an array.
* @global array $wp_filter Stores all of the filters
* @global array $wp_actions Increments the amount of times action was triggered.
* @global array $merged_filters Merges the filter hooks using this function.
* @global array $wp_current_filter Stores the list of current filters with the current one last
*
* @param string $tag The name of the action to be executed.
* @param array $args The arguments supplied to the functions hooked to `$tag`.
*/
function do_action_ref_array($tag, $args) {
global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
global $wp_filter, $wp_actions, $wp_current_filter;
if ( ! isset($wp_actions[$tag]) )
$wp_actions[$tag] = 1;
@ -588,20 +512,7 @@ function do_action_ref_array($tag, $args) {
if ( !isset($wp_filter['all']) )
$wp_current_filter[] = $tag;
// Sort
if ( !isset( $merged_filters[ $tag ] ) ) {
ksort($wp_filter[$tag]);
$merged_filters[ $tag ] = true;
}
reset( $wp_filter[ $tag ] );
do {
foreach ( (array) current($wp_filter[$tag]) as $the_ )
if ( !is_null($the_['function']) )
call_user_func_array($the_['function'], array_slice($args, 0, (int) $the_['accepted_args']));
} while ( next($wp_filter[$tag]) !== false );
$wp_filter[ $tag ]->do_action( $args );
array_pop($wp_current_filter);
}
@ -923,13 +834,7 @@ function register_uninstall_hook( $file, $callback ) {
function _wp_call_all_hook($args) {
global $wp_filter;
reset( $wp_filter['all'] );
do {
foreach ( (array) current($wp_filter['all']) as $the_ )
if ( !is_null($the_['function']) )
call_user_func_array($the_['function'], $args);
} while ( next($wp_filter['all']) !== false );
$wp_filter['all']->do_all_hook( $args );
}
/**

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.7-alpha-38559';
$wp_version = '4.7-alpha-38571';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.