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$the_['accepted_args'])); } while ( next($wp_filter[$tag]) !== false ); array_pop( $wp_current_filter ); return $args[0]; } /** * Removes a function from a specified filter hook. * * 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. * * 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. 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Default false. * @return bool True when finished. */ function remove_all_filters( $tag, $priority = false ) { global $wp_filter, $merged_filters; if ( isset( $wp_filter[ $tag ]) ) { if ( false === $priority ) { $wp_filter[ $tag ] = array(); } elseif ( isset( $wp_filter[ $tag ][ $priority ] ) ) { $wp_filter[ $tag ][ $priority ] = array(); } } if ( isset( $merged_filters[ $tag ] ) ) { unset( $merged_filters[ $tag ] ); } 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 ); } /** * Hooks a function on to a specific action. * * 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 $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, $accepted_args = 1) { return add_filter($tag, $function_to_add, $priority, $accepted_args); } /** * Execute functions hooked on a specific action hook. * * This function invokes all functions attached to action hook `$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. 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, $merged_filters, $wp_current_filter; if ( ! isset($wp_actions[$tag]) ) $wp_actions[$tag] = 1; else ++$wp_actions[$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($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this) $args[] =& $arg[0]; else $args[] = $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[$tag]) !== false ); array_pop($wp_current_filter); } /** * 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 $tag is fired. */ function did_action($tag) { global $wp_actions; if ( ! isset( $wp_actions[ $tag ] ) ) return 0; return $wp_actions[$tag]; } /** * Execute functions hooked on a specific 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 $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, $merged_filters, $wp_current_filter; if ( ! isset($wp_actions[$tag]) ) $wp_actions[$tag] = 1; else ++$wp_actions[$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; // 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[$tag]) !== false ); array_pop($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); } /** * Removes a function from a specified action hook. * * 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. * * @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. * @return boolean Whether the function is removed. */ 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); } // // 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 * * @param string $file The filename of plugin. * @return string The name of a plugin. */ 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; } /** * 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 * 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 callback $function The function hooked to the 'activate_PLUGIN' action. */ function register_activation_hook($file, $function) { $file = plugin_basename($file); add_action('activate_' . $file, $function); } /** * Set 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 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); } /** * 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; 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 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 $function; if ( is_object($function) ) { // Closures are currently implemented as objects $function = array( $function, '' ); } else { $function = (array) $function; } if (is_object($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; } } elseif ( is_string( $function[0] ) ) { // Static Calling return $function[0] . '::' . $function[1]; } }
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