<?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 http://us2.php.net/manual/en/language.pseudo-types.php#language.types.callback 'callback'}
+ * type are valid.
+ *
+ * Also see the {@link http://codex.wordpress.org/Plugin_API Plugin API} for
+ * more information and examples on how to use a lot of these functions.
+ *
+ * @package WordPress
+ * @subpackage Plugin
+ * @since 1.5.0
+ */
+
+// Initialize the filter globals.
+global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
+
+if ( ! isset( $wp_filter ) )
+ $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();
/**
- * Hooks a function to a specific filter action.
- *
- * Filters are the hooks that WordPress launches to modify text of various types
- * before adding it to the database or sending it to the browser screen. Plugins
- * can specify that one or more of its PHP functions is executed to
- * modify specific types of text at these times, using the Filter API.
- * See the [Plugin API] for a list of filter hooks.
- *
- * @param string $tag The name of the filter to hook the <tt>$function_to_add</tt> to.
- * @param callback $function_to_add The name of the function to be called when the filter is applied.
- * @param int $priority optional. Used to specify the order in which the functions associated with a particular action are executed (default: 10). 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 $accepted_args optional. The number of arguments the function accept (default 1). In WordPress 1.5.1+, hooked functions can take extra arguments that are set when the matching do_action() or apply_filters() call is run.
- * @return boolean true if the <tt>$function_to_add</tt> is added succesfully to filter <tt>$tag</tt>. How many arguments your function takes. In WordPress 1.5.1+, hooked functions can take extra arguments that are set when the matching <tt>do_action()</tt> or <tt>apply_filters()</tt> call is run. For example, the action <tt>comment_id_not_found</tt> will pass any functions that hook onto it the ID of the requested comment.
+ * Hook a function or method to a specific filter action.
+ *
+ * WordPress offers filter hooks to allow plugins to modify
+ * various types of internal data at runtime.
+ *
+ * A plugin can modify data by binding a callback to a filter hook. When the filter
+ * is later applied, each bound callback is run in order of priority, and given
+ * the opportunity to modify a value by returning a new value.
+ *
+ * The following example shows how a callback function is bound to a filter hook.
+ *
+ * Note that `$example` is passed to the callback, (maybe) modified, then returned:
+ *
+ * function example_callback( $example ) {
+ * // Maybe modify $example in some way.
+ * return $example;
+ * }
+ * add_filter( 'example_filter', 'example_callback' );
+ *
+ * Since WordPress 1.5.1, bound callbacks can take as many arguments as are
+ * passed as parameters in the corresponding apply_filters() call. The `$accepted_args`
+ * parameter allows for calling functions only when the number of args match.
+ *
+ * *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 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 callback $function_to_add 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 action are executed. Default 10.
+ * 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 $accepted_args Optional. The number of arguments the function accepts. Default 1.
+ * @return boolean true
*/
-function add_filter($tag, $function_to_add, $priority = 10, $accepted_args = 1) {
+function add_filter( $tag, $function_to_add, $priority = 10, $accepted_args = 1 ) {
global $wp_filter, $merged_filters;
- // So the format is wp_filter['tag']['array of priorities']['array of functions serialized']['array of ['array (functions, accepted_args)]']
$idx = _wp_filter_build_unique_id($tag, $function_to_add, $priority);
- $wp_filter[$tag][$priority][$idx] = array('function' => $function_to_add, 'accepted_args' => $accepted_args);
- //$wp_filter[$tag][$priority][serialize($function_to_add)] = array('function' => $function_to_add, 'accepted_args' => $accepted_args);
+ $wp_filter[$tag][$priority][$idx] = array('function' => $function_to_add, 'accepted_args' => $accepted_args);
unset( $merged_filters[ $tag ] );
return true;
}
+/**
+ * Check if any filter has been registered for a hook.
+ *
+ * @since 2.5.0
+ *
+ * @global array $wp_filter Stores all of the filters.
+ *
+ * @param string $tag The name of the filter hook.
+ * @param callback|bool $function_to_check Optional. The callback to check for. Default false.
+ * @return bool|int If $function_to_check 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. When using the
+ * $function_to_check argument, this function may return a non-boolean value
+ * that evaluates to false (e.g.) 0, so use the === operator for testing the
+ * return value.
+ */
+function has_filter($tag, $function_to_check = false) {
+ // Don't reset the internal array pointer
+ $wp_filter = $GLOBALS['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, $function_to_check, false) )
+ return false;
+
+ foreach ( (array) array_keys($wp_filter[$tag]) as $priority ) {
+ if ( isset($wp_filter[$tag][$priority][$idx]) )
+ return $priority;
+ }
+
+ return false;
+}
+
/**
* Call the functions added to a filter hook.
*
- * The callback functions attached to filter hook <tt>$tag</tt> are invoked by
- * calling this function. This function can be used to create a new filter hook
- * by simply calling this function with the name of the new hook specified using
- * the <tt>$tag</a> parameter.
- * @uses merge_filters Merges the filter hooks using this function.
- * @param string $tag The name of the filter hook.
- * @param string $string The text on which the filters hooked to <tt>$tag</tt> are applied on.
- * @param mixed $var,... Additional variables passed to the functions hooked to <tt>$tag</tt>.
- * @return string The text in <tt>$string</tt> after all hooked functions are applied to it.
+ * The callback functions attached to filter hook $tag are invoked by calling
+ * this function. This function can be used to create a new filter hook by
+ * simply calling this function with the name of the new hook specified using
+ * the $tag parameter.
+ *
+ * The function allows for additional arguments to be added and passed to hooks.
+ *
+ * // Our 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 we
+ * * "hooked" to 'example_filter' using the add_filter() function above.
+ * * - 'example_filter' is the filter hook $tag
+ * * - '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
+ *
+ * @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.
+ * @param mixed $value The value on which the filters hooked to `$tag` are applied on.
+ * @param mixed $var Additional variables passed to the functions hooked to `$tag`.
+ * @return mixed The filtered value after all hooked functions are applied to it.
*/
-function apply_filters($tag, $string) {
- global $wp_filter, $merged_filters;
+function apply_filters( $tag, $value ) {
+ global $wp_filter, $merged_filters, $wp_current_filter;
+
+ $args = array();
- if ( !isset( $merged_filters[ $tag ] ) )
- merge_filters($tag);
+ // Do 'all' actions first.
+ if ( isset($wp_filter['all']) ) {
+ $wp_current_filter[] = $tag;
+ $args = func_get_args();
+ _wp_call_all_hook($args);
+ }
+
+ if ( !isset($wp_filter[$tag]) ) {
+ if ( isset($wp_filter['all']) )
+ array_pop($wp_current_filter);
+ return $value;
+ }
+
+ if ( !isset($wp_filter['all']) )
+ $wp_current_filter[] = $tag;
- if ( !isset($wp_filter[$tag]) )
- return $string;
+ // Sort.
+ if ( !isset( $merged_filters[ $tag ] ) ) {
+ ksort($wp_filter[$tag]);
+ $merged_filters[ $tag ] = true;
+ }
reset( $wp_filter[ $tag ] );
- $args = func_get_args();
+ if ( empty($args) )
+ $args = func_get_args();
- do{
+ do {
foreach( (array) current($wp_filter[$tag]) as $the_ )
if ( !is_null($the_['function']) ){
- $args[1] = $string;
- $string = call_user_func_array($the_['function'], array_slice($args, 1, (int) $the_['accepted_args']));
+ $args[1] = $value;
+ $value = call_user_func_array($the_['function'], array_slice($args, 1, (int) $the_['accepted_args']));
}
} while ( next($wp_filter[$tag]) !== false );
- return $string;
+ array_pop( $wp_current_filter );
+
+ return $value;
}
/**
- * Merge the filter functions of a specific filter hook with generic filter functions.
+ * Execute functions hooked on a specific filter hook, specifying arguments in an array.
+ *
+ * @see 3.0.0
+ *
+ * @see apply_filters() This function is identical, but the arguments passed to the
+ * functions hooked to `$tag` are supplied using an array.
*
- * It is possible to defined generic filter functions using the filter hook
- * <em>all</e>. These functions are called for every filter tag. This function
- * merges the functions attached to the <em>all</em> hook with the functions
- * of a specific hoook defined by <tt>$tag</tt>.
- * @param string $tag The filter hook of which the functions should be merged.
+ * @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.
+ * @param array $args The arguments supplied to the functions hooked to $tag.
+ * @return mixed The filtered value after all hooked functions are applied to it.
*/
-function merge_filters($tag) {
- global $wp_filter, $merged_filters;
+function apply_filters_ref_array($tag, $args) {
+ global $wp_filter, $merged_filters, $wp_current_filter;
+
+ // Do 'all' actions first
+ if ( isset($wp_filter['all']) ) {
+ $wp_current_filter[] = $tag;
+ $all_args = func_get_args();
+ _wp_call_all_hook($all_args);
+ }
- if ( isset($wp_filter['all']) && is_array($wp_filter['all']) )
- $wp_filter[$tag] = array_merge($wp_filter['all'], (array) $wp_filter[$tag]);
+ if ( !isset($wp_filter[$tag]) ) {
+ if ( isset($wp_filter['all']) )
+ array_pop($wp_current_filter);
+ return $args[0];
+ }
- if ( isset($wp_filter[$tag]) ){
- reset($wp_filter[$tag]);
- uksort($wp_filter[$tag], "strnatcasecmp");
+ if ( !isset($wp_filter['all']) )
+ $wp_current_filter[] = $tag;
+
+ // Sort
+ if ( !isset( $merged_filters[ $tag ] ) ) {
+ ksort($wp_filter[$tag]);
+ $merged_filters[ $tag ] = true;
}
- $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 );
+
+ array_pop( $wp_current_filter );
+
+ return $args[0];
}
/**
* This function removes a function attached to a specified filter hook. This
* method can be used to remove default functions attached to a specific filter
* hook and possibly replace them with a substitute.
- * @param string $tag The filter hook to which the function to be removed is hooked.
+ *
+ * To remove a hook, the $function_to_remove 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 $tag The filter hook to which the function to be removed is hooked.
* @param callback $function_to_remove The name of the function which should be removed.
- * @param int $priority optional. The priority of the function (default: 10).
- * @param int $accepted_args optional. The number of arguments the function accpets (default: 1).
- * @return boolean Whether the function is removed.
+ * @param int $priority Optional. The priority of the function. Default 10.
+ * @return boolean 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 );
+
+ $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 ] );
+ }
+ if ( empty( $GLOBALS['wp_filter'][ $tag ] ) ) {
+ $GLOBALS['wp_filter'][ $tag ] = array();
+ }
+ unset( $GLOBALS['merged_filters'][ $tag ] );
+ }
+
+ return $r;
+}
+
+/**
+ * Remove all of the hooks from a filter.
+ *
+ * @since 2.7.0
+ *
+ * @param string $tag The filter to remove hooks from.
+ * @param int|bool $priority Optional. The priority number to remove. Default false.
+ * @return bool True when finished.
*/
-function remove_filter($tag, $function_to_remove, $priority = 10, $accepted_args = 1) {
- $function_to_remove = _wp_filter_build_unique_id($tag, $function_to_remove, $priority);
+function remove_all_filters( $tag, $priority = false ) {
+ global $wp_filter, $merged_filters;
- $r = isset($GLOBALS['wp_filter'][$tag][$priority][$function_to_remove]);
+ if ( isset( $wp_filter[ $tag ]) ) {
+ if ( false !== $priority && isset( $wp_filter[ $tag ][ $priority ] ) ) {
+ $wp_filter[ $tag ][ $priority ] = array();
+ } else {
+ $wp_filter[ $tag ] = array();
+ }
+ }
- unset($GLOBALS['wp_filter'][$tag][$priority][$function_to_remove]);
- unset($GLOBALS['merged_filters'][$tag]);
+ if ( isset( $merged_filters[ $tag ] ) ) {
+ unset( $merged_filters[ $tag ] );
+ }
- return $r;
+ return true;
+}
+
+/**
+ * Retrieve the name of the current filter or action.
+ *
+ * @since 2.5.0
+ *
+ * @return string Hook name of the current filter or action.
+ */
+function current_filter() {
+ global $wp_current_filter;
+ return end( $wp_current_filter );
+}
+
+/**
+ * Retrieve the name of the current action.
+ *
+ * @since 3.9.0
+ *
+ * @return string Hook name of the current action.
+ */
+function current_action() {
+ return current_filter();
+}
+
+/**
+ * Retrieve the name of a filter currently being processed.
+ *
+ * The function current_filter() only returns the most recent filter or action
+ * being executed. did_action() returns true once the action is initially
+ * processed.
+ *
+ * This function allows detection for any filter currently being
+ * executed (despite not being 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_action()
+ * @global array $wp_current_filter Current filter.
+ *
+ * @param null|string $filter Optional. Filter 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( $filter = null ) {
+ global $wp_current_filter;
+
+ if ( null === $filter ) {
+ return ! empty( $wp_current_filter );
+ }
+
+ return in_array( $filter, $wp_current_filter );
+}
+
+/**
+ * Retrieve the name of an action currently being processed.
+ *
+ * @since 3.9.0
+ *
+ * @param string|null $action Optional. Action 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( $action = null ) {
+ return doing_filter( $action );
}
/**
* one or more of its PHP functions are executed at these points, using the
* Action API.
*
- * @param string $tag The name of the action to which the <tt>$function_to-add</tt> is hooked.
- * @param callback $function_to_add The name of the function you wish to be called. Note: any of the syntaxes explained in the PHP documentation for the 'callback' type (http://us2.php.net/manual/en/language.pseudo-types.php#language.types.callback) are valid.
- * @param int $priority optional. Used to specify the order in which the functions associated with a particular action are executed (default: 10). 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 optional. The number of arguments the function accept (default 1). In WordPress 1.5.1+, hooked functions can take extra arguments that are set when the matching do_action() or apply_filters() call is run.
- * @return boolean Always true.
+ * @since 1.2.0
+ *
+ * @param string $tag The name of the action to which the $function_to_add is hooked.
+ * @param callback $function_to_add The name of the function you wish to be called.
+ * @param int $priority Optional. Used to specify the order in which the functions
+ * associated with a particular action are executed. Default 10.
+ * 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 $accepted_args Optional. The number of arguments the function accept. Default 1.
+ * @return bool Will always return true.
*/
function add_action($tag, $function_to_add, $priority = 10, $accepted_args = 1) {
- add_filter($tag, $function_to_add, $priority, $accepted_args);
+ return add_filter($tag, $function_to_add, $priority, $accepted_args);
}
/**
* Execute functions hooked on a specific action hook.
*
- * This function invokes all functions attached to action hook <tt>$tag</tt>.
- * It is possible to create new action hooks by simply calling this function,
- * specifying the name of the new hook using the <tt>$tag</tt> parameter.
- * @uses merge_filters
+ * This function invokes all functions attached to action hook `$tag`. It is
+ * possible to create new action hooks by simply calling this function,
+ * specifying the name of the new hook using the `$tag` parameter.
+ *
+ * You can pass extra arguments to the hooks, much like you can with
+ * {@see apply_filters()}.
+ *
+ * @since 1.2.0
+ *
+ * @global array $wp_filter Stores all of the filters
+ * @global array $wp_actions Increments the amount of times action was triggered.
+ *
* @param string $tag 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.
+ * @param mixed $arg Optional. Additional arguments which are passed on to the
+ * functions hooked to the action. Default empty.
+ * @return null Will return null if $tag does not exist in $wp_filter array.
*/
function do_action($tag, $arg = '') {
- global $wp_filter, $wp_actions;
+ global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
- if ( is_array($wp_actions) )
- $wp_actions[] = $tag;
+ if ( ! isset($wp_actions[$tag]) )
+ $wp_actions[$tag] = 1;
else
- $wp_actions = array($tag);
+ ++$wp_actions[$tag];
+
+ // Do 'all' actions first
+ if ( isset($wp_filter['all']) ) {
+ $wp_current_filter[] = $tag;
+ $all_args = func_get_args();
+ _wp_call_all_hook($all_args);
+ }
+
+ if ( !isset($wp_filter[$tag]) ) {
+ if ( isset($wp_filter['all']) )
+ array_pop($wp_current_filter);
+ return;
+ }
+
+ if ( !isset($wp_filter['all']) )
+ $wp_current_filter[] = $tag;
$args = array();
- if ( is_array($arg) && 1 == count($arg) && is_object($arg[0]) ) // array(&$this)
+ if ( is_array($arg) && 1 == count($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this)
$args[] =& $arg[0];
else
$args[] = $arg;
for ( $a = 2; $a < func_num_args(); $a++ )
$args[] = func_get_arg($a);
- merge_filters($tag);
+ // Sort
+ if ( !isset( $merged_filters[ $tag ] ) ) {
+ ksort($wp_filter[$tag]);
+ $merged_filters[ $tag ] = true;
+ }
- if ( !isset($wp_filter[$tag]) )
- return;
+ reset( $wp_filter[ $tag ] );
- do{
- foreach( (array) current($wp_filter[$tag]) as $the_ )
+ do {
+ foreach ( (array) current($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[$tag]) !== false );
+ array_pop($wp_current_filter);
}
/**
- * Return the number times an action is fired.
+ * Retrieve the number of times an action is fired.
+ *
+ * @since 2.1.0
+ *
+ * @global array $wp_actions Increments the amount of times action was triggered.
+ *
* @param string $tag The name of the action hook.
- * @return int The number of times action hook <tt>$tag</tt> is fired
+ * @return int The number of times action hook $tag is fired.
*/
function did_action($tag) {
global $wp_actions;
- if ( empty($wp_actions) )
+ if ( ! isset( $wp_actions[ $tag ] ) )
return 0;
- return count(array_keys($wp_actions, $tag));
+ return $wp_actions[$tag];
}
/**
- * Execute functions hooked on a specific action hook, specifying arguments in a array.
+ * Execute functions hooked on a specific action hook, specifying arguments in an array.
*
- * This function is identical to {@link do_action}, but the argumetns passe to
- * the functions hooked to <tt>$tag</tt> are supplied using an array.
- * @param string $tag The name of the action to be executed.
- * @param array $args The arguments supplied to the functions hooked to <tt>$tag</tt>
+ * @since 2.1.0
+ *
+ * @see do_action() This function is identical, but the arguments passed to the
+ * 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.
+ *
+ * @param string $tag The name of the action to be executed.
+ * @param array $args The arguments supplied to the functions hooked to `$tag`.
+ * @return null Will return null if `$tag` does not exist in `$wp_filter` array.
*/
function do_action_ref_array($tag, $args) {
- global $wp_filter, $wp_actions;
+ global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
- if ( !is_array($wp_actions) )
- $wp_actions = array($tag);
+ if ( ! isset($wp_actions[$tag]) )
+ $wp_actions[$tag] = 1;
else
- $wp_actions[] = $tag;
+ ++$wp_actions[$tag];
- merge_filters($tag);
+ // Do 'all' actions first
+ if ( isset($wp_filter['all']) ) {
+ $wp_current_filter[] = $tag;
+ $all_args = func_get_args();
+ _wp_call_all_hook($all_args);
+ }
- if ( !isset($wp_filter[$tag]) )
+ if ( !isset($wp_filter[$tag]) ) {
+ if ( isset($wp_filter['all']) )
+ array_pop($wp_current_filter);
return;
+ }
+
+ 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[ $tag ] );
- do{
+ do {
foreach( (array) current($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[$tag]) !== false );
+ array_pop($wp_current_filter);
+}
+
+/**
+ * Check if any action has been registered for a hook.
+ *
+ * @since 2.5.0
+ *
+ * @see has_filter() has_action() is an alias of has_filter().
+ *
+ * @param string $tag The name of the action hook.
+ * @param callback|bool $function_to_check Optional. The callback to check for. Default false.
+ * @return bool|int If $function_to_check 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. When using the
+ * $function_to_check argument, this function may return a non-boolean value
+ * that evaluates to false (e.g.) 0, so use the === operator for testing the
+ * return value.
+ */
+function has_action($tag, $function_to_check = false) {
+ return has_filter($tag, $function_to_check);
}
/**
* This function removes a function attached to a specified action hook. This
* method can be used to remove default functions attached to a specific filter
* hook and possibly replace them with a substitute.
- * @param string $tag The action hook to which the function to be removed is hooked.
+ *
+ * @since 1.2.0
+ *
+ * @param string $tag The action hook to which the function to be removed is hooked.
* @param callback $function_to_remove The name of the function which should be removed.
- * @param int $priority optional The priority of the function (default: 10).
- * @param int $accepted_args optional. The number of arguments the function accpets (default: 1).
+ * @param int $priority Optional. The priority of the function. Default 10.
* @return boolean Whether the function is removed.
*/
-function remove_action($tag, $function_to_remove, $priority = 10, $accepted_args = 1) {
- return remove_filter($tag, $function_to_remove, $priority, $accepted_args);
+function remove_action( $tag, $function_to_remove, $priority = 10 ) {
+ return remove_filter( $tag, $function_to_remove, $priority );
+}
+
+/**
+ * Remove all of the hooks from an action.
+ *
+ * @since 2.7.0
+ *
+ * @param string $tag The action to remove hooks from.
+ * @param int|bool $priority The priority number to remove them from. Default false.
+ * @return bool True when finished.
+ */
+function remove_all_actions($tag, $priority = false) {
+ return remove_all_filters($tag, $priority);
}
//
/**
* Gets the basename of a plugin.
*
- * This method extract the name of a plugin from its filename.
+ * This method extracts the name of a plugin from its filename.
+ *
+ * @since 1.5.0
+ *
* @param string $file The filename of plugin.
* @return string The name of a plugin.
*/
-function plugin_basename($file) {
- $file = str_replace('\\','/',$file); // sanitize for Win32 installs
- $file = preg_replace('|/+|','/', $file); // remove any duplicate slash
- $file = preg_replace('|^.*/wp-content/plugins/|','',$file); // get relative path from plugins dir
+function plugin_basename( $file ) {
+ global $wp_plugin_paths;
+
+ foreach ( $wp_plugin_paths as $dir => $realdir ) {
+ if ( strpos( $file, $realdir ) === 0 ) {
+ $file = $dir . substr( $file, strlen( $realdir ) );
+ }
+ }
+
+ $file = wp_normalize_path( $file );
+ $plugin_dir = wp_normalize_path( WP_PLUGIN_DIR );
+ $mu_plugin_dir = wp_normalize_path( WPMU_PLUGIN_DIR );
+
+ $file = preg_replace('#^' . preg_quote($plugin_dir, '#') . '/|^' . preg_quote($mu_plugin_dir, '#') . '/#','',$file); // get relative path from plugins dir
+ $file = trim($file, '/');
return $file;
}
/**
- * Hook a function on a plugin activation action hook.
+ * Register a plugin's real path.
+ *
+ * This is used in plugin_basename() to resolve symlinked paths.
+ *
+ * @since 3.9.0
+ *
+ * @see plugin_basename()
+ *
+ * @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, $wpmu_plugin_path;
+ 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
- * activated. 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 <tt>wp-content/plugin/sampleplugin/sample.php</tt>, then the
- * name of this hook will become 'activate_sampleplugin/sample.php'.
+ * 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
- * <tt>wp-content/plugin/sample.php</tt> the name of this hook will be
+ * wp-content/plugins/sample.php the name of this hook will be
* 'activate_sample.php'.
- * @param string $file The filename of the plugin including the path.
- * @param string $function the function hooked to the 'activate_PLUGIN' action.
+ *
+ * @since 2.0.0
+ *
+ * @param string $file The filename of the plugin including the path.
+ * @param callback $function The function hooked to the 'activate_PLUGIN' action.
*/
function register_activation_hook($file, $function) {
$file = plugin_basename($file);
}
/**
- * Hook a function on a plugin deactivation action hook.
+ * Set the deactivation hook for a plugin.
*
* When a plugin is deactivated, the action 'deactivate_PLUGINNAME' hook is
- * deactivated. 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 <tt>wp-content/plugin/sampleplugin/sample.php</tt>, then the
- * name of this hook will become 'activate_sampleplugin/sample.php'.
+ * 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
- * <tt>wp-content/plugin/sample.php</tt> the name of this hook will be
- * 'activate_sample.php'.
- * @param string $file The filename of the plugin including the path.
- * @param string $function the function hooked to the 'activate_PLUGIN' action.
+ * 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 callback $function The function hooked to the 'deactivate_PLUGIN' action.
*/
function register_deactivation_hook($file, $function) {
$file = plugin_basename($file);
add_action('deactivate_' . $file, $function);
}
-function _wp_filter_build_unique_id($tag, $function, $priority = 10)
-{
+/**
+ * Set 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 uninstall process. The plugin should not
+ * hinder the uninstall 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 uninstall 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 callback $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' );
+ 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');
+ $uninstallable_plugins[plugin_basename($file)] = $callback;
+
+ update_option('uninstall_plugins', $uninstallable_plugins);
+}
+
+/**
+ * Call 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
+ *
+ * @param array $args The collected parameters from the hook that was called.
+ */
+function _wp_call_all_hook($args) {
global $wp_filter;
- // If function then just skip all of the tests and not overwrite the following.
- // Static Calling
- if( is_string($function) )
+ 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 );
+}
+
+/**
+ * Build Unique ID for storage and retrieval.
+ *
+ * The old way to serialize the callback caused issues and this function is the
+ * solution. It works by checking for objects and creating an a new property in
+ * the class to keep track of the object and new objects of the same class that
+ * need to be added.
+ *
+ * It also allows for the removal of actions and filters for objects after they
+ * change class properties. It is possible to include the property $wp_filter_id
+ * in your class and set it to "null" or a number to bypass the workaround.
+ * However this will prevent you from adding new classes and any new classes
+ * will overwrite the previous hook by the same class.
+ *
+ * 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
+ * @access private
+ *
+ * @global array $wp_filter Storage for all of the filters and actions.
+ *
+ * @param string $tag Used in counting how many hooks were applied
+ * @param callback $function Used for creating unique id
+ * @param int|bool $priority Used in counting how many hooks were applied. If === false
+ * and $function is an object reference, we return the unique
+ * id only if it already has one, false otherwise.
+ * @return string|bool Unique ID for usage as array key or false if $priority === false
+ * and $function is an object reference, and it does not already have
+ * a unique id.
+ */
+function _wp_filter_build_unique_id($tag, $function, $priority) {
+ global $wp_filter;
+ static $filter_id_count = 0;
+
+ if ( is_string($function) )
return $function;
- // Object Class Calling
- else if(is_object($function[0]) )
- {
- $obj_idx = get_class($function[0]).$function[1];
- if( is_null($function[0]->wp_filter_id) ) {
- $count = count((array)$wp_filter[$tag][$priority]);
- $function[0]->wp_filter_id = $count;
- $obj_idx .= $count;
- unset($count);
- } else
- $obj_idx .= $function[0]->wp_filter_id;
- return $obj_idx;
+
+ if ( is_object($function) ) {
+ // Closures are currently implemented as objects
+ $function = array( $function, '' );
+ } else {
+ $function = (array) $function;
}
- else if( is_string($function[0]) )
- return $function[0].$function[1];
-}
-?>
+ if (is_object($function[0]) ) {
+ // Object Class Calling
+ if ( function_exists('spl_object_hash') ) {
+ return spl_object_hash($function[0]) . $function[1];
+ } else {
+ $obj_idx = get_class($function[0]).$function[1];
+ if ( !isset($function[0]->wp_filter_id) ) {
+ if ( false === $priority )
+ return false;
+ $obj_idx .= isset($wp_filter[$tag][$priority]) ? count((array)$wp_filter[$tag][$priority]) : $filter_id_count;
+ $function[0]->wp_filter_id = $filter_id_count;
+ ++$filter_id_count;
+ } else {
+ $obj_idx .= $function[0]->wp_filter_id;
+ }
+
+ return $obj_idx;
+ }
+ } else if ( is_string($function[0]) ) {
+ // Static Calling
+ return $function[0] . '::' . $function[1];
+ }
+}
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff