932 lines
31 KiB
PHP
932 lines
31 KiB
PHP
<?php
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/**
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* The plugin API is located in this file, which allows for creating actions
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* and filters and hooking functions, and methods. The functions or methods will
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* then be run when the action or filter is called.
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*
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* The API callback examples reference functions, but can be methods of classes.
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* To hook methods, you'll need to pass an array one of two ways.
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*
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* Any of the syntaxes explained in the PHP documentation for the
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* {@link https://secure.php.net/manual/en/language.pseudo-types.php#language.types.callback 'callback'}
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* type are valid.
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*
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* Also see the {@link https://developer.wordpress.org/plugins/ Plugin API} for
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* more information and examples on how to use a lot of these functions.
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*
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* This file should have no external dependencies.
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*
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* @package WordPress
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* @subpackage Plugin
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* @since 1.5.0
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*/
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// Initialize the filter globals.
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require( dirname( __FILE__ ) . '/class-wp-hook.php' );
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/** @var WP_Hook[] $wp_filter */
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global $wp_filter, $wp_actions, $wp_current_filter;
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if ( $wp_filter ) {
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$wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
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} else {
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$wp_filter = array();
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}
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if ( ! isset( $wp_actions ) ) {
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$wp_actions = array();
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}
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if ( ! isset( $wp_current_filter ) ) {
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$wp_current_filter = array();
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}
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/**
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* Hook a function or method to a specific filter action.
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*
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* WordPress offers filter hooks to allow plugins to modify
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* various types of internal data at runtime.
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*
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* A plugin can modify data by binding a callback to a filter hook. When the filter
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* is later applied, each bound callback is run in order of priority, and given
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* the opportunity to modify a value by returning a new value.
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*
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* The following example shows how a callback function is bound to a filter hook.
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*
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* Note that `$example` is passed to the callback, (maybe) modified, then returned:
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*
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* function example_callback( $example ) {
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* // Maybe modify $example in some way.
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* return $example;
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* }
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* add_filter( 'example_filter', 'example_callback' );
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*
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* Bound callbacks can accept from none to the total number of arguments passed as parameters
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* in the corresponding apply_filters() call.
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*
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* In other words, if an apply_filters() call passes four total arguments, callbacks bound to
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* it can accept none (the same as 1) of the arguments or up to four. The important part is that
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* the `$accepted_args` value must reflect the number of arguments the bound callback *actually*
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* opted to accept. If no arguments were accepted by the callback that is considered to be the
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* same as accepting 1 argument. For example:
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*
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* // Filter call.
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* $value = apply_filters( 'hook', $value, $arg2, $arg3 );
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*
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* // Accepting zero/one arguments.
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* function example_callback() {
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* ...
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* return 'some value';
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* }
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* add_filter( 'hook', 'example_callback' ); // Where $priority is default 10, $accepted_args is default 1.
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*
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* // Accepting two arguments (three possible).
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* function example_callback( $value, $arg2 ) {
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* ...
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* return $maybe_modified_value;
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* }
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* add_filter( 'hook', 'example_callback', 10, 2 ); // Where $priority is 10, $accepted_args is 2.
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*
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* *Note:* The function will return true whether or not the callback is valid.
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* It is up to you to take care. This is done for optimization purposes, so
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* everything is as quick as possible.
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*
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* @since 0.71
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*
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* @global array $wp_filter A multidimensional array of all hooks and the callbacks hooked to them.
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*
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* @param string $tag The name of the filter to hook the $function_to_add callback to.
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* @param callable $function_to_add The callback to be run when the filter is applied.
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* @param int $priority Optional. Used to specify the order in which the functions
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* associated with a particular action are executed. Default 10.
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* Lower numbers correspond with earlier execution,
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* and functions with the same priority are executed
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* in the order in which they were added to the action.
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* @param int $accepted_args Optional. The number of arguments the function accepts. Default 1.
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* @return true
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*/
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function add_filter( $tag, $function_to_add, $priority = 10, $accepted_args = 1 ) {
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global $wp_filter;
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if ( ! isset( $wp_filter[ $tag ] ) ) {
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$wp_filter[ $tag ] = new WP_Hook();
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}
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$wp_filter[ $tag ]->add_filter( $tag, $function_to_add, $priority, $accepted_args );
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return true;
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}
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/**
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* Check if any filter has been registered for a hook.
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*
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* @since 2.5.0
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*
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* @global array $wp_filter Stores all of the filters.
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*
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* @param string $tag The name of the filter hook.
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* @param callable|bool $function_to_check Optional. The callback to check for. Default false.
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* @return false|int If $function_to_check is omitted, returns boolean for whether the hook has
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* anything registered. When checking a specific function, the priority of that
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* hook is returned, or false if the function is not attached. When using the
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* $function_to_check argument, this function may return a non-boolean value
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* that evaluates to false (e.g.) 0, so use the === operator for testing the
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* return value.
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*/
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function has_filter( $tag, $function_to_check = false ) {
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global $wp_filter;
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if ( ! isset( $wp_filter[ $tag ] ) ) {
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return false;
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}
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return $wp_filter[ $tag ]->has_filter( $tag, $function_to_check );
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}
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/**
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* Calls the callback functions that have been added to a filter hook.
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*
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* The callback functions attached to the filter hook are invoked by calling
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* this function. This function can be used to create a new filter hook by
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* simply calling this function with the name of the new hook specified using
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* the `$tag` parameter.
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*
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* The function also allows for multiple additional arguments to be passed to hooks.
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*
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* Example usage:
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*
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* // The filter callback function
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* function example_callback( $string, $arg1, $arg2 ) {
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* // (maybe) modify $string
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* return $string;
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* }
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* add_filter( 'example_filter', 'example_callback', 10, 3 );
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*
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* /*
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* * Apply the filters by calling the 'example_callback()' function that's
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* * hooked onto `example_filter` above.
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* *
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* * - 'example_filter' is the filter hook
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* * - 'filter me' is the value being filtered
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* * - $arg1 and $arg2 are the additional arguments passed to the callback.
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* $value = apply_filters( 'example_filter', 'filter me', $arg1, $arg2 );
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*
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* @since 0.71
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*
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* @global array $wp_filter Stores all of the filters.
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* @global array $wp_current_filter Stores the list of current filters with the current one last.
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*
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* @param string $tag The name of the filter hook.
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* @param mixed $value The value to filter.
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* @param mixed ...$args Additional parameters to pass to the callback functions.
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* @return mixed The filtered value after all hooked functions are applied to it.
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*/
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function apply_filters( $tag, $value ) {
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global $wp_filter, $wp_current_filter;
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$args = func_get_args();
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// Do 'all' actions first.
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if ( isset( $wp_filter['all'] ) ) {
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$wp_current_filter[] = $tag;
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_wp_call_all_hook( $args );
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}
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if ( ! isset( $wp_filter[ $tag ] ) ) {
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if ( isset( $wp_filter['all'] ) ) {
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array_pop( $wp_current_filter );
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}
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return $value;
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}
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if ( ! isset( $wp_filter['all'] ) ) {
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$wp_current_filter[] = $tag;
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}
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// Don't pass the tag name to WP_Hook.
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array_shift( $args );
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$filtered = $wp_filter[ $tag ]->apply_filters( $value, $args );
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array_pop( $wp_current_filter );
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return $filtered;
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}
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/**
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* Calls the callback functions that have been added to a filter hook, specifying arguments in an array.
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*
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* @since 3.0.0
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*
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* @see apply_filters() This function is identical, but the arguments passed to the
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* functions hooked to `$tag` are supplied using an array.
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*
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* @global array $wp_filter Stores all of the filters
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* @global array $wp_current_filter Stores the list of current filters with the current one last
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*
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* @param string $tag The name of the filter hook.
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* @param array $args The arguments supplied to the functions hooked to $tag.
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* @return mixed The filtered value after all hooked functions are applied to it.
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*/
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function apply_filters_ref_array( $tag, $args ) {
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global $wp_filter, $wp_current_filter;
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// Do 'all' actions first
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if ( isset( $wp_filter['all'] ) ) {
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$wp_current_filter[] = $tag;
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$all_args = func_get_args();
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_wp_call_all_hook( $all_args );
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}
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if ( ! isset( $wp_filter[ $tag ] ) ) {
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if ( isset( $wp_filter['all'] ) ) {
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array_pop( $wp_current_filter );
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}
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return $args[0];
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}
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if ( ! isset( $wp_filter['all'] ) ) {
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$wp_current_filter[] = $tag;
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}
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$filtered = $wp_filter[ $tag ]->apply_filters( $args[0], $args );
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array_pop( $wp_current_filter );
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return $filtered;
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}
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/**
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* Removes a function from a specified filter hook.
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*
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* This function removes a function attached to a specified filter hook. This
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* method can be used to remove default functions attached to a specific filter
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* hook and possibly replace them with a substitute.
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*
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* To remove a hook, the $function_to_remove and $priority arguments must match
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* when the hook was added. This goes for both filters and actions. No warning
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* will be given on removal failure.
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*
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* @since 1.2.0
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*
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* @global array $wp_filter Stores all of the filters
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*
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* @param string $tag The filter hook to which the function to be removed is hooked.
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* @param callable $function_to_remove The name of the function which should be removed.
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* @param int $priority Optional. The priority of the function. Default 10.
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* @return bool Whether the function existed before it was removed.
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*/
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function remove_filter( $tag, $function_to_remove, $priority = 10 ) {
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global $wp_filter;
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$r = false;
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if ( isset( $wp_filter[ $tag ] ) ) {
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$r = $wp_filter[ $tag ]->remove_filter( $tag, $function_to_remove, $priority );
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if ( ! $wp_filter[ $tag ]->callbacks ) {
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unset( $wp_filter[ $tag ] );
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}
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}
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return $r;
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}
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/**
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* Remove all of the hooks from a filter.
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*
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* @since 2.7.0
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*
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* @global array $wp_filter Stores all of the filters
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*
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* @param string $tag The filter to remove hooks from.
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* @param int|bool $priority Optional. The priority number to remove. Default false.
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* @return true True when finished.
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*/
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function remove_all_filters( $tag, $priority = false ) {
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global $wp_filter;
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if ( isset( $wp_filter[ $tag ] ) ) {
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$wp_filter[ $tag ]->remove_all_filters( $priority );
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if ( ! $wp_filter[ $tag ]->has_filters() ) {
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unset( $wp_filter[ $tag ] );
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}
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}
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return true;
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}
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/**
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* Retrieve the name of the current filter or action.
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*
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* @since 2.5.0
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*
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* @global array $wp_current_filter Stores the list of current filters with the current one last
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*
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* @return string Hook name of the current filter or action.
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*/
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function current_filter() {
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global $wp_current_filter;
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return end( $wp_current_filter );
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}
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/**
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* Retrieve the name of the current action.
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*
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* @since 3.9.0
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*
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* @return string Hook name of the current action.
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*/
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function current_action() {
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return current_filter();
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}
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/**
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* Retrieve the name of a filter currently being processed.
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*
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* The function current_filter() only returns the most recent filter or action
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* being executed. did_action() returns true once the action is initially
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* processed.
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*
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* This function allows detection for any filter currently being
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* executed (despite not being the most recent filter to fire, in the case of
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* hooks called from hook callbacks) to be verified.
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*
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* @since 3.9.0
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*
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* @see current_filter()
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* @see did_action()
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* @global array $wp_current_filter Current filter.
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*
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* @param null|string $filter Optional. Filter to check. Defaults to null, which
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* checks if any filter is currently being run.
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* @return bool Whether the filter is currently in the stack.
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*/
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function doing_filter( $filter = null ) {
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global $wp_current_filter;
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if ( null === $filter ) {
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return ! empty( $wp_current_filter );
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}
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return in_array( $filter, $wp_current_filter );
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}
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/**
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* Retrieve the name of an action currently being processed.
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*
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* @since 3.9.0
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*
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* @param string|null $action Optional. Action to check. Defaults to null, which checks
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* if any action is currently being run.
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* @return bool Whether the action is currently in the stack.
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*/
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function doing_action( $action = null ) {
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return doing_filter( $action );
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}
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/**
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* Hooks a function on to a specific action.
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*
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* Actions are the hooks that the WordPress core launches at specific points
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* during execution, or when specific events occur. Plugins can specify that
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* one or more of its PHP functions are executed at these points, using the
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* Action API.
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*
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* @since 1.2.0
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*
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* @param string $tag The name of the action to which the $function_to_add is hooked.
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* @param callable $function_to_add The name of the function you wish to be called.
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* @param int $priority Optional. Used to specify the order in which the functions
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* associated with a particular action are executed. Default 10.
|
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* Lower numbers correspond with earlier execution,
|
|
* and functions with the same priority are executed
|
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* in the order in which they were added to the action.
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* @param int $accepted_args Optional. The number of arguments the function accepts. Default 1.
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* @return true Will always return true.
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*/
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function add_action( $tag, $function_to_add, $priority = 10, $accepted_args = 1 ) {
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return add_filter( $tag, $function_to_add, $priority, $accepted_args );
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}
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/**
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* Execute functions hooked on a specific action hook.
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*
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* This function invokes all functions attached to action hook `$tag`. It is
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* possible to create new action hooks by simply calling this function,
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* specifying the name of the new hook using the `$tag` parameter.
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*
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* You can pass extra arguments to the hooks, much like you can with `apply_filters()`.
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*
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* Example usage:
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*
|
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* // The action callback function
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* function example_callback( $arg1, $arg2 ) {
|
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* // (maybe) do something with the args
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* }
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* add_action( 'example_action', 'example_callback', 10, 2 );
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*
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* /*
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* * Trigger the actions by calling the 'example_callback()' function that's
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* * hooked onto `example_action` above.
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* *
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* * - 'example_action' is the action hook
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* * - $arg1 and $arg2 are the additional arguments passed to the callback.
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* $value = do_action( 'example_action', $arg1, $arg2 );
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*
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* @since 1.2.0
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*
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* @global array $wp_filter Stores all of the filters
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* @global array $wp_actions Increments the amount of times action was triggered.
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* @global array $wp_current_filter Stores the list of current filters with the current one last
|
|
*
|
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* @param string $tag The name of the action to be executed.
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* @param mixed ...$arg Optional. Additional arguments which are passed on to the
|
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* functions hooked to the action. Default empty.
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*/
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function do_action( $tag, ...$arg ) {
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global $wp_filter, $wp_actions, $wp_current_filter;
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if ( ! isset( $wp_actions[ $tag ] ) ) {
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$wp_actions[ $tag ] = 1;
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} else {
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++$wp_actions[ $tag ];
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}
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// Do 'all' actions first
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if ( isset( $wp_filter['all'] ) ) {
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$wp_current_filter[] = $tag;
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$all_args = func_get_args();
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_wp_call_all_hook( $all_args );
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}
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|
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if ( ! isset( $wp_filter[ $tag ] ) ) {
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if ( isset( $wp_filter['all'] ) ) {
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array_pop( $wp_current_filter );
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}
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return;
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}
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if ( ! isset( $wp_filter['all'] ) ) {
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$wp_current_filter[] = $tag;
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}
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if ( empty( $arg ) ) {
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$arg[] = '';
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}
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$wp_filter[ $tag ]->do_action( $arg );
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array_pop( $wp_current_filter );
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}
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|
|
/**
|
|
* 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 ) {
|
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global $wp_actions;
|
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if ( ! isset( $wp_actions[ $tag ] ) ) {
|
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return 0;
|
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}
|
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return $wp_actions[ $tag ];
|
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}
|
|
|
|
/**
|
|
* Calls the callback functions that have been added to an action hook, specifying arguments in an array.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @see do_action() This function is identical, but the arguments passed to the
|
|
* functions hooked to `$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];
|
|
}
|
|
}
|