From 7086111ad4dd997e12a3220e1ee60c9b9bcf0bb8 Mon Sep 17 00:00:00 2001 From: Charles Date: Tue, 7 Jan 2020 13:06:14 +0100 Subject: Added wordpress --- srcs/wordpress/wp-includes/plugin.php | 936 ++++++++++++++++++++++++++++++++++ 1 file changed, 936 insertions(+) create mode 100644 srcs/wordpress/wp-includes/plugin.php (limited to 'srcs/wordpress/wp-includes/plugin.php') diff --git a/srcs/wordpress/wp-includes/plugin.php b/srcs/wordpress/wp-includes/plugin.php new file mode 100644 index 0000000..6e9de6c --- /dev/null +++ b/srcs/wordpress/wp-includes/plugin.php @@ -0,0 +1,936 @@ +add_filter( $tag, $function_to_add, $priority, $accepted_args ); + 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 callable|bool $function_to_check Optional. The callback to check for. Default false. + * @return false|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 ) { + global $wp_filter; + + if ( ! isset( $wp_filter[ $tag ] ) ) { + return false; + } + + return $wp_filter[ $tag ]->has_filter( $tag, $function_to_check ); +} + +/** + * Calls the callback functions that have been added to a filter hook. + * + * The callback functions attached to the filter hook are invoked by calling + * this function. This function can be used to create a new filter hook by + * simply calling this function with the name of the new hook specified using + * the `$tag` parameter. + * + * The function also allows for multiple additional arguments to be passed to hooks. + * + * Example usage: + * + * // The filter callback function + * function example_callback( $string, $arg1, $arg2 ) { + * // (maybe) modify $string + * return $string; + * } + * add_filter( 'example_filter', 'example_callback', 10, 3 ); + * + * /* + * * Apply the filters by calling the 'example_callback()' function that's + * * hooked onto `example_filter` above. + * * + * * - 'example_filter' is the filter hook + * * - 'filter me' is the value being filtered + * * - $arg1 and $arg2 are the additional arguments passed to the callback. + * $value = apply_filters( 'example_filter', 'filter me', $arg1, $arg2 ); + * + * @since 0.71 + * + * @global array $wp_filter Stores all of the filters. + * @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 $value The value to filter. + * @param mixed ...$args Additional parameters to pass to the callback functions. + * @return mixed The filtered value after all hooked functions are applied to it. + */ +function apply_filters( $tag, $value ) { + global $wp_filter, $wp_current_filter; + + $args = func_get_args(); + + // Do 'all' actions first. + if ( isset( $wp_filter['all'] ) ) { + $wp_current_filter[] = $tag; + _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; + } + + // Don't pass the tag name to WP_Hook. + array_shift( $args ); + + $filtered = $wp_filter[ $tag ]->apply_filters( $value, $args ); + + array_pop( $wp_current_filter ); + + return $filtered; +} + +/** + * Calls the callback functions that have been added to a filter hook, specifying arguments in an array. + * + * @since 3.0.0 + * + * @see apply_filters() This function is identical, but the arguments passed to the + * functions hooked to `$tag` are supplied using an array. + * + * @global array $wp_filter Stores all of the filters + * @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 apply_filters_ref_array( $tag, $args ) { + global $wp_filter, $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[ $tag ] ) ) { + if ( isset( $wp_filter['all'] ) ) { + array_pop( $wp_current_filter ); + } + return $args[0]; + } + + if ( ! isset( $wp_filter['all'] ) ) { + $wp_current_filter[] = $tag; + } + + $filtered = $wp_filter[ $tag ]->apply_filters( $args[0], $args ); + + array_pop( $wp_current_filter ); + + return $filtered; +} + +/** + * 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 + * + * @global array $wp_filter Stores all of the filters + * + * @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. + * @param int $priority Optional. The priority of the function. Default 10. + * @return bool Whether the function existed before it was removed. + */ +function remove_filter( $tag, $function_to_remove, $priority = 10 ) { + global $wp_filter; + + $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 ] ); + } + } + + return $r; +} + +/** + * Remove all of the hooks from a filter. + * + * @since 2.7.0 + * + * @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; + + if ( isset( $wp_filter[ $tag ] ) ) { + $wp_filter[ $tag ]->remove_all_filters( $priority ); + if ( ! $wp_filter[ $tag ]->has_filters() ) { + unset( $wp_filter[ $tag ] ); + } + } + + return true; +} + +/** + * Retrieve the name of the current filter or action. + * + * @since 2.5.0 + * + * @global array $wp_current_filter Stores the list of current filters with the current one last + * + * @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 callable $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 accepts. Default 1. + * @return true 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 `apply_filters()`. + * + * Example usage: + * + * // The action callback function + * function example_callback( $arg1, $arg2 ) { + * // (maybe) do something with the args + * } + * add_action( 'example_action', 'example_callback', 10, 2 ); + * + * /* + * * Trigger the actions by calling the 'example_callback()' function that's + * * hooked onto `example_action` above. + * * + * * - 'example_action' is the action hook + * * - $arg1 and $arg2 are the additional arguments passed to the callback. + * $value = do_action( 'example_action', $arg1, $arg2 ); + * + * @since 1.2.0 + * @since 5.3.0 Formalized the existing and already documented `...$arg` parameter + * by adding it to the function signature. + * + * @global array $wp_filter Stores all of the filters + * @global array $wp_actions Increments the amount of times action was triggered. + * @global array $wp_current_filter Stores the list of current filters with the current one last + * + * @param string $tag The name of the action to be executed. + * @param mixed ...$arg Optional. Additional arguments which are passed on to the + * functions hooked to the action. Default empty. + */ +function do_action( $tag, ...$arg ) { + global $wp_filter, $wp_actions, $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; + } + + if ( empty( $arg ) ) { + $arg[] = ''; + } elseif ( is_array( $arg[0] ) && 1 === count( $arg[0] ) && isset( $arg[0][0] ) && is_object( $arg[0][0] ) ) { + // Backward compatibility for PHP4-style passing of `array( &$this )` as action `$arg`. + $arg[0] = $arg[0][0]; + } + + $wp_filter[ $tag ]->do_action( $arg ); + + 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[ $tag ]; +} + +/** + * Calls the callback functions that have been added to an action hook, specifying arguments in an array. + * + * @since 2.1.0 + * + * @see do_action() This function is identical, but the arguments passed to the + * functions hooked to `$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 $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, $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; + } + + $wp_filter[ $tag ]->do_action( $args ); + + 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 callable|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 callable $function_to_remove The name of the function which should be removed. + * @param int $priority Optional. The priority of the function. Default 10. + * @return bool 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 true True when finished. + */ +function remove_all_actions( $tag, $priority = false ) { + return remove_all_filters( $tag, $priority ); +} + +/** + * Fires functions attached to a deprecated filter hook. + * + * When a filter hook is deprecated, the apply_filters() call is replaced with + * apply_filters_deprecated(), which triggers a deprecation notice and then fires + * the original filter hook. + * + * Note: the value and extra arguments passed to the original apply_filters() call + * must be passed here to `$args` as an array. For example: + * + * // Old filter. + * return apply_filters( 'wpdocs_filter', $value, $extra_arg ); + * + * // Deprecated. + * return apply_filters_deprecated( 'wpdocs_filter', array( $value, $extra_arg ), '4.9', 'wpdocs_new_filter' ); + * + * @since 4.6.0 + * + * @see _deprecated_hook() + * + * @param string $tag The name of the filter hook. + * @param array $args Array of additional function arguments to be passed to apply_filters(). + * @param string $version The version of WordPress that deprecated the hook. + * @param string $replacement Optional. The hook that should have been used. Default false. + * @param string $message Optional. A message regarding the change. Default null. + */ +function apply_filters_deprecated( $tag, $args, $version, $replacement = false, $message = null ) { + if ( ! has_filter( $tag ) ) { + return $args[0]; + } + + _deprecated_hook( $tag, $version, $replacement, $message ); + + return apply_filters_ref_array( $tag, $args ); +} + +/** + * Fires functions attached to a deprecated action hook. + * + * When an action hook is deprecated, the do_action() call is replaced with + * do_action_deprecated(), which triggers a deprecation notice and then fires + * the original hook. + * + * @since 4.6.0 + * + * @see _deprecated_hook() + * + * @param string $tag The name of the action hook. + * @param array $args Array of additional function arguments to be passed to do_action(). + * @param string $version The version of WordPress that deprecated the hook. + * @param string $replacement Optional. The hook that should have been used. + * @param string $message Optional. A message regarding the change. + */ +function do_action_deprecated( $tag, $args, $version, $replacement = false, $message = null ) { + if ( ! has_action( $tag ) ) { + return; + } + + _deprecated_hook( $tag, $version, $replacement, $message ); + + do_action_ref_array( $tag, $args ); +} + +// +// Functions for handling plugins. +// + +/** + * Gets the basename of a plugin. + * + * This method extracts the name of a plugin from its filename. + * + * @since 1.5.0 + * + * @global array $wp_plugin_paths + * + * @param string $file The filename of plugin. + * @return string The name of a plugin. + */ +function plugin_basename( $file ) { + global $wp_plugin_paths; + + // $wp_plugin_paths contains normalized paths. + $file = wp_normalize_path( $file ); + + arsort( $wp_plugin_paths ); + foreach ( $wp_plugin_paths as $dir => $realdir ) { + if ( strpos( $file, $realdir ) === 0 ) { + $file = $dir . substr( $file, strlen( $realdir ) ); + } + } + + $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 wp_normalize_path() + * + * @global array $wp_plugin_paths + * + * @staticvar string $wp_plugin_path + * @staticvar string $wpmu_plugin_path + * + * @param string $file Known path to the file. + * @return bool Whether the path was able to be registered. + */ +function wp_register_plugin_realpath( $file ) { + global $wp_plugin_paths; + + // Normalize, but store as static to avoid recalculation of a constant value + static $wp_plugin_path = null, $wpmu_plugin_path = null; + if ( ! isset( $wp_plugin_path ) ) { + $wp_plugin_path = wp_normalize_path( WP_PLUGIN_DIR ); + $wpmu_plugin_path = wp_normalize_path( WPMU_PLUGIN_DIR ); + } + + $plugin_path = wp_normalize_path( dirname( $file ) ); + $plugin_realpath = wp_normalize_path( dirname( realpath( $file ) ) ); + + if ( $plugin_path === $wp_plugin_path || $plugin_path === $wpmu_plugin_path ) { + return false; + } + + if ( $plugin_path !== $plugin_realpath ) { + $wp_plugin_paths[ $plugin_path ] = $plugin_realpath; + } + + return true; +} + +/** + * Get the filesystem directory path (with trailing slash) for the plugin __FILE__ passed in. + * + * @since 2.8.0 + * + * @param string $file The filename of the plugin (__FILE__). + * @return string the filesystem path of the directory that contains the plugin. + */ +function plugin_dir_path( $file ) { + return trailingslashit( dirname( $file ) ); +} + +/** + * Get the URL directory path (with trailing slash) for the plugin __FILE__ passed in. + * + * @since 2.8.0 + * + * @param string $file The filename of the plugin (__FILE__). + * @return string the URL path of the directory that contains the plugin. + */ +function plugin_dir_url( $file ) { + return trailingslashit( plugins_url( '', $file ) ); +} + +/** + * Set the activation hook for a plugin. + * + * When a plugin is activated, the action 'activate_PLUGINNAME' hook is + * called. In the name of this hook, PLUGINNAME is replaced with the name + * of the plugin, including the optional subdirectory. For example, when the + * plugin is located in wp-content/plugins/sampleplugin/sample.php, then + * the name of this hook will become 'activate_sampleplugin/sample.php'. + * + * When the plugin consists of only one file and is (as by default) located at + * wp-content/plugins/sample.php the name of this hook will be + * 'activate_sample.php'. + * + * @since 2.0.0 + * + * @param string $file The filename of the plugin including the path. + * @param callable $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 callable $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 uninstallation process. The plugin should not + * hinder the uninstallation process. + * + * If the plugin can not be written without running code within the plugin, then + * the plugin should create a file named 'uninstall.php' in the base plugin + * folder. This file will be called, if it exists, during the uninstallation process + * bypassing the uninstall hook. The plugin, when using the 'uninstall.php' + * should always check for the 'WP_UNINSTALL_PLUGIN' constant, before + * executing. + * + * @since 2.7.0 + * + * @param string $file Plugin file. + * @param callable $callback The callback to run when the hook is called. Must be + * a static method or function. + */ +function register_uninstall_hook( $file, $callback ) { + if ( is_array( $callback ) && is_object( $callback[0] ) ) { + _doing_it_wrong( __FUNCTION__, __( 'Only a static class method or function can be used in an uninstall hook.' ), '3.1.0' ); + return; + } + + /* + * The option should not be autoloaded, because it is not needed in most + * cases. Emphasis should be put on using the 'uninstall.php' way of + * uninstalling the plugin. + */ + $uninstallable_plugins = (array) get_option( 'uninstall_plugins' ); + $plugin_basename = plugin_basename( $file ); + if ( ! isset( $uninstallable_plugins[ $plugin_basename ] ) || $uninstallable_plugins[ $plugin_basename ] !== $callback ) { + $uninstallable_plugins[ $plugin_basename ] = $callback; + update_option( 'uninstall_plugins', $uninstallable_plugins ); + } +} + +/** + * 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 + * + * @global array $wp_filter Stores all of the filters + * + * @param array $args The collected parameters from the hook that was called. + */ +function _wp_call_all_hook( $args ) { + global $wp_filter; + + $wp_filter['all']->do_all_hook( $args ); +} + +/** + * 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. + * @staticvar int $filter_id_count + * + * @param string $tag Used in counting how many hooks were applied + * @param callable $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|false 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 + return spl_object_hash( $function[0] ) . $function[1]; + } elseif ( is_string( $function[0] ) ) { + // Static Calling + return $function[0] . '::' . $function[1]; + } +} -- cgit