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<?php
/**
* The plugin API is located in this file, which allows for creating actions
* and filters and hooking functions, and methods. The functions or methods will
* then be run when the action or filter is called.
*
* The API callback examples reference functions, but can be methods of classes.
* To hook methods, you'll need to pass an array one of two ways.
*
* Any of the syntaxes explained in the PHP documentation for the
* {@link https://www.php.net/manual/en/language.pseudo-types.php#language.types.callback 'callback'}
* type are valid.
*
* Also see the {@link https://developer.wordpress.org/plugins/ Plugin API} for
* more information and examples on how to use a lot of these functions.
*
* This file should have no external dependencies.
*
* @package WordPress
* @subpackage Plugin
* @since 1.5.0
*/
// Initialize the filter globals.
require __DIR__ . '/class-wp-hook.php';
/** @var WP_Hook[] $wp_filter */
global $wp_filter;
/** @var int[] $wp_actions */
global $wp_actions;
/** @var int[] $wp_filters */
global $wp_filters;
/** @var string[] $wp_current_filter */
global $wp_current_filter;
if ( $wp_filter ) {
$wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
} else {
$wp_filter = array();
}
if ( ! isset( $wp_actions ) ) {
$wp_actions = array();
}
if ( ! isset( $wp_filters ) ) {
$wp_filters = array();
}
if ( ! isset( $wp_current_filter ) ) {
$wp_current_filter = array();
}
/**
* Adds a callback function to a filter hook.
*
* WordPress offers filter hooks to allow plugins to modify
* various types of internal data at runtime.
*
* A plugin can modify data by binding a callback to a filter hook. When the filter
* is later applied, each bound callback is run in order of priority, and given
* the opportunity to modify a value by returning a new value.
*
* The following example shows how a callback function is bound to a filter hook.
*
* Note that `$example` is passed to the callback, (maybe) modified, then returned:
*
* function example_callback( $example ) {
* // Maybe modify $example in some way.
* return $example;
* }
* add_filter( 'example_filter', 'example_callback' );
*
* Bound callbacks can accept from none to the total number of arguments passed as parameters
* in the corresponding apply_filters() call.
*
* In other words, if an apply_filters() call passes four total arguments, callbacks bound to
* it can accept none (the same as 1) of the arguments or up to four. The important part is that
* the `$accepted_args` value must reflect the number of arguments the bound callback *actually*
* opted to accept. If no arguments were accepted by the callback that is considered to be the
* same as accepting 1 argument. For example:
*
* // Filter call.
* $value = apply_filters( 'hook', $value, $arg2, $arg3 );
*
* // Accepting zero/one arguments.
* function example_callback() {
* ...
* return 'some value';
* }
* add_filter( 'hook', 'example_callback' ); // Where $priority is default 10, $accepted_args is default 1.
*
* // Accepting two arguments (three possible).
* function example_callback( $value, $arg2 ) {
* ...
* return $maybe_modified_value;
* }
* add_filter( 'hook', 'example_callback', 10, 2 ); // Where $priority is 10, $accepted_args is 2.
*
* *Note:* The function will return true whether or not the callback is valid.
* It is up to you to take care. This is done for optimization purposes, so
* everything is as quick as possible.
*
* @since 0.71
*
* @global WP_Hook[] $wp_filter A multidimensional array of all hooks and the callbacks hooked to them.
*
* @param string $hook_name The name of the filter to add the callback to.
* @param callable $callback The callback to be run when the filter is applied.
* @param int $priority Optional. Used to specify the order in which the functions
* associated with a particular filter are executed.
* Lower numbers correspond with earlier execution,
* and functions with the same priority are executed
* in the order in which they were added to the filter. Default 10.
* @param int $accepted_args Optional. The number of arguments the function accepts. Default 1.
* @return true Always returns true.
*/
function add_filter( $hook_name, $callback, $priority = 10, $accepted_args = 1 ) {
global $wp_filter;
if ( ! isset( $wp_filter[ $hook_name ] ) ) {
$wp_filter[ $hook_name ] = new WP_Hook();
}
$wp_filter[ $hook_name ]->add_filter( $hook_name, $callback, $priority, $accepted_args );
return true;
}
/**
* Calls the callback functions that have been added to a filter hook.
*
* This function invokes all functions attached to filter hook `$hook_name`.
* It is possible to create new filter hooks by simply calling this function,
* specifying the name of the new hook using the `$hook_name` 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, $arg2 );
*
* @since 0.71
* @since 6.0.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @global WP_Hook[] $wp_filter Stores all of the filters and actions.
* @global int[] $wp_filters Stores the number of times each filter was triggered.
* @global string[] $wp_current_filter Stores the list of current filters with the current one last.
*
* @param string $hook_name 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( $hook_name, $value, ...$args ) {
global $wp_filter, $wp_filters, $wp_current_filter;
if ( ! isset( $wp_filters[ $hook_name ] ) ) {
$wp_filters[ $hook_name ] = 1;
} else {
++$wp_filters[ $hook_name ];
}
// Do 'all' actions first.
if ( isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
$all_args = func_get_args(); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection
_wp_call_all_hook( $all_args );
}
if ( ! isset( $wp_filter[ $hook_name ] ) ) {
if ( isset( $wp_filter['all'] ) ) {
array_pop( $wp_current_filter );
}
return $value;
}
if ( ! isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
}
// Pass the value to WP_Hook.
array_unshift( $args, $value );
$filtered = $wp_filter[ $hook_name ]->apply_filters( $value, $args );
array_pop( $wp_current_filter );
return $filtered;
}
/**
* Calls the callback functions that have been added to a filter hook, specifying arguments in an array.
*
* @since 3.0.0
*
* @see apply_filters() This function is identical, but the arguments passed to the
* functions hooked to `$hook_name` are supplied using an array.
*
* @global WP_Hook[] $wp_filter Stores all of the filters and actions.
* @global int[] $wp_filters Stores the number of times each filter was triggered.
* @global string[] $wp_current_filter Stores the list of current filters with the current one last.
*
* @param string $hook_name The name of the filter hook.
* @param array $args The arguments supplied to the functions hooked to `$hook_name`.
* @return mixed The filtered value after all hooked functions are applied to it.
*/
function apply_filters_ref_array( $hook_name, $args ) {
global $wp_filter, $wp_filters, $wp_current_filter;
if ( ! isset( $wp_filters[ $hook_name ] ) ) {
$wp_filters[ $hook_name ] = 1;
} else {
++$wp_filters[ $hook_name ];
}
// Do 'all' actions first.
if ( isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
$all_args = func_get_args(); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection
_wp_call_all_hook( $all_args );
}
if ( ! isset( $wp_filter[ $hook_name ] ) ) {
if ( isset( $wp_filter['all'] ) ) {
array_pop( $wp_current_filter );
}
return $args[0];
}
if ( ! isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
}
$filtered = $wp_filter[ $hook_name ]->apply_filters( $args[0], $args );
array_pop( $wp_current_filter );
return $filtered;
}
/**
* Checks if any filter has been registered for a hook.
*
* When using the `$callback` 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.
*
* @since 2.5.0
*
* @global WP_Hook[] $wp_filter Stores all of the filters and actions.
*
* @param string $hook_name The name of the filter hook.
* @param callable|string|array|false $callback Optional. The callback to check for.
* This function can be called unconditionally to speculatively check
* a callback that may or may not exist. Default false.
* @return bool|int If `$callback` 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.
*/
function has_filter( $hook_name, $callback = false ) {
global $wp_filter;
if ( ! isset( $wp_filter[ $hook_name ] ) ) {
return false;
}
return $wp_filter[ $hook_name ]->has_filter( $hook_name, $callback );
}
/**
* Removes a callback function from a filter hook.
*
* This can be used to remove default functions attached to a specific filter
* hook and possibly replace them with a substitute.
*
* To remove a hook, the `$callback` 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 WP_Hook[] $wp_filter Stores all of the filters and actions.
*
* @param string $hook_name The filter hook to which the function to be removed is hooked.
* @param callable|string|array $callback The callback to be removed from running when the filter is applied.
* This function can be called unconditionally to speculatively remove
* a callback that may or may not exist.
* @param int $priority Optional. The exact priority used when adding the original
* filter callback. Default 10.
* @return bool Whether the function existed before it was removed.
*/
function remove_filter( $hook_name, $callback, $priority = 10 ) {
global $wp_filter;
$r = false;
if ( isset( $wp_filter[ $hook_name ] ) ) {
$r = $wp_filter[ $hook_name ]->remove_filter( $hook_name, $callback, $priority );
if ( ! $wp_filter[ $hook_name ]->callbacks ) {
unset( $wp_filter[ $hook_name ] );
}
}
return $r;
}
/**
* Removes all of the callback functions from a filter hook.
*
* @since 2.7.0
*
* @global WP_Hook[] $wp_filter Stores all of the filters and actions.
*
* @param string $hook_name The filter to remove callbacks from.
* @param int|false $priority Optional. The priority number to remove them from.
* Default false.
* @return true Always returns true.
*/
function remove_all_filters( $hook_name, $priority = false ) {
global $wp_filter;
if ( isset( $wp_filter[ $hook_name ] ) ) {
$wp_filter[ $hook_name ]->remove_all_filters( $priority );
if ( ! $wp_filter[ $hook_name ]->has_filters() ) {
unset( $wp_filter[ $hook_name ] );
}
}
return true;
}
/**
* Retrieves the name of the current filter hook.
*
* @since 2.5.0
*
* @global string[] $wp_current_filter Stores the list of current filters with the current one last
*
* @return string Hook name of the current filter.
*/
function current_filter() {
global $wp_current_filter;
return end( $wp_current_filter );
}
/**
* Returns whether or not a filter hook is currently being processed.
*
* The function current_filter() only returns the most recent filter being executed.
* did_filter() returns the number of times a filter has been applied during
* the current request.
*
* This function allows detection for any filter currently being executed
* (regardless of whether it's 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_filter()
* @global string[] $wp_current_filter Current filter.
*
* @param string|null $hook_name Optional. Filter hook 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( $hook_name = null ) {
global $wp_current_filter;
if ( null === $hook_name ) {
return ! empty( $wp_current_filter );
}
return in_array( $hook_name, $wp_current_filter, true );
}
/**
* Retrieves the number of times a filter has been applied during the current request.
*
* @since 6.1.0
*
* @global int[] $wp_filters Stores the number of times each filter was triggered.
*
* @param string $hook_name The name of the filter hook.
* @return int The number of times the filter hook has been applied.
*/
function did_filter( $hook_name ) {
global $wp_filters;
if ( ! isset( $wp_filters[ $hook_name ] ) ) {
return 0;
}
return $wp_filters[ $hook_name ];
}
/**
* Adds a callback function to an action hook.
*
* 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 $hook_name The name of the action to add the callback to.
* @param callable $callback The callback to be run when the action is called.
* @param int $priority Optional. Used to specify the order in which the functions
* associated with a particular action are executed.
* Lower numbers correspond with earlier execution,
* and functions with the same priority are executed
* in the order in which they were added to the action. Default 10.
* @param int $accepted_args Optional. The number of arguments the function accepts. Default 1.
* @return true Always returns true.
*/
function add_action( $hook_name, $callback, $priority = 10, $accepted_args = 1 ) {
return add_filter( $hook_name, $callback, $priority, $accepted_args );
}
/**
* Calls the callback functions that have been added to an action hook.
*
* This function invokes all functions attached to action hook `$hook_name`.
* It is possible to create new action hooks by simply calling this function,
* specifying the name of the new hook using the `$hook_name` 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.
* 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 WP_Hook[] $wp_filter Stores all of the filters and actions.
* @global int[] $wp_actions Stores the number of times each action was triggered.
* @global string[] $wp_current_filter Stores the list of current filters with the current one last.
*
* @param string $hook_name The name of the action to be executed.
* @param mixed ...$arg Optional. Additional arguments which are passed on to the
* functions hooked to the action. Default empty.
*/
function do_action( $hook_name, ...$arg ) {
global $wp_filter, $wp_actions, $wp_current_filter;
if ( ! isset( $wp_actions[ $hook_name ] ) ) {
$wp_actions[ $hook_name ] = 1;
} else {
++$wp_actions[ $hook_name ];
}
// Do 'all' actions first.
if ( isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
$all_args = func_get_args(); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection
_wp_call_all_hook( $all_args );
}
if ( ! isset( $wp_filter[ $hook_name ] ) ) {
if ( isset( $wp_filter['all'] ) ) {
array_pop( $wp_current_filter );
}
return;
}
if ( ! isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
}
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[ $hook_name ]->do_action( $arg );
array_pop( $wp_current_filter );
}
/**
* Calls the callback functions that have been added to an action hook, specifying arguments in an array.
*
* @since 2.1.0
*
* @see do_action() This function is identical, but the arguments passed to the
* functions hooked to `$hook_name` are supplied using an array.
*
* @global WP_Hook[] $wp_filter Stores all of the filters and actions.
* @global int[] $wp_actions Stores the number of times each action was triggered.
* @global string[] $wp_current_filter Stores the list of current filters with the current one last.
*
* @param string $hook_name The name of the action to be executed.
* @param array $args The arguments supplied to the functions hooked to `$hook_name`.
*/
function do_action_ref_array( $hook_name, $args ) {
global $wp_filter, $wp_actions, $wp_current_filter;
if ( ! isset( $wp_actions[ $hook_name ] ) ) {
$wp_actions[ $hook_name ] = 1;
} else {
++$wp_actions[ $hook_name ];
}
// Do 'all' actions first.
if ( isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
$all_args = func_get_args(); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection
_wp_call_all_hook( $all_args );
}
if ( ! isset( $wp_filter[ $hook_name ] ) ) {
if ( isset( $wp_filter['all'] ) ) {
array_pop( $wp_current_filter );
}
return;
}
if ( ! isset( $wp_filter['all'] ) ) {
$wp_current_filter[] = $hook_name;
}
$wp_filter[ $hook_name ]->do_action( $args );
array_pop( $wp_current_filter );
}
/**
* Checks if any action has been registered for a hook.
*
* When using the `$callback` 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.
*
* @since 2.5.0
*
* @see has_filter() has_action() is an alias of has_filter().
*
* @param string $hook_name The name of the action hook.
* @param callable|string|array|false $callback Optional. The callback to check for.
* This function can be called unconditionally to speculatively check
* a callback that may or may not exist. Default false.
* @return bool|int If `$callback` 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.
*/
function has_action( $hook_name, $callback = false ) {
return has_filter( $hook_name, $callback );
}
/**
* Removes a callback function from an action hook.
*
* This can be used to remove default functions attached to a specific action
* hook and possibly replace them with a substitute.
*
* To remove a hook, the `$callback` 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 $hook_name The action hook to which the function to be removed is hooked.
* @param callable|string|array $callback The name of the function which should be removed.
* This function can be called unconditionally to speculatively remove
* a callback that may or may not exist.
* @param int $priority Optional. The exact priority used when adding the original
* action callback. Default 10.
* @return bool Whether the function is removed.
*/
function remove_action( $hook_name, $callback, $priority = 10 ) {
return remove_filter( $hook_name, $callback, $priority );
}
/**
* Removes all of the callback functions from an action hook.
*
* @since 2.7.0
*
* @param string $hook_name The action to remove callbacks from.
* @param int|false $priority Optional. The priority number to remove them from.
* Default false.
* @return true Always returns true.
*/
function remove_all_actions( $hook_name, $priority = false ) {
return remove_all_filters( $hook_name, $priority );
}
/**
* Retrieves the name of the current action hook.
*
* @since 3.9.0
*
* @return string Hook name of the current action.
*/
function current_action() {
return current_filter();
}
/**
* Returns whether or not an action hook is currently being processed.
*
* The function current_action() only returns the most recent action being executed.
* did_action() returns the number of times an action has been fired during
* the current request.
*
* This function allows detection for any action currently being executed
* (regardless of whether it's the most recent action to fire, in the case of
* hooks called from hook callbacks) to be verified.
*
* @since 3.9.0
*
* @see current_action()
* @see did_action()
*
* @param string|null $hook_name Optional. Action hook 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( $hook_name = null ) {
return doing_filter( $hook_name );
}
/**
* Retrieves the number of times an action has been fired during the current request.
*
* @since 2.1.0
*
* @global int[] $wp_actions Stores the number of times each action was triggered.
*
* @param string $hook_name The name of the action hook.
* @return int The number of times the action hook has been fired.
*/
function did_action( $hook_name ) {
global $wp_actions;
if ( ! isset( $wp_actions[ $hook_name ] ) ) {
return 0;
}
return $wp_actions[ $hook_name ];
}
/**
* Fires functions attached to a deprecated filter hook.
*
* When a filter hook is deprecated, the apply_filters() call is replaced with
* apply_filters_deprecated(), which triggers a deprecation notice and then fires
* the original filter hook.
*
* Note: the value and extra arguments passed to the original apply_filters() call
* must be passed here to `$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 ), '4.9.0', 'wpdocs_new_filter' );
*
* @since 4.6.0
*
* @see _deprecated_hook()
*
* @param string $hook_name 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 empty.
* @param string $message Optional. A message regarding the change. Default empty.
*/
function apply_filters_deprecated( $hook_name, $args, $version, $replacement = '', $message = '' ) {
if ( ! has_filter( $hook_name ) ) {
return $args[0];
}
_deprecated_hook( $hook_name, $version, $replacement, $message );
return apply_filters_ref_array( $hook_name, $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 $hook_name 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. Default empty.
* @param string $message Optional. A message regarding the change. Default empty.
*/
function do_action_deprecated( $hook_name, $args, $version, $replacement = '', $message = '' ) {
if ( ! has_action( $hook_name ) ) {
return;
}
_deprecated_hook( $hook_name, $version, $replacement, $message );
do_action_ref_array( $hook_name, $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 );
// Get relative path from plugins directory.
$file = preg_replace( '#^' . preg_quote( $plugin_dir, '#' ) . '/|^' . preg_quote( $mu_plugin_dir, '#' ) . '/#', '', $file );
$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
*
* @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 $callback The function hooked to the 'activate_PLUGIN' action.
*/
function register_activation_hook( $file, $callback ) {
$file = plugin_basename( $file );
add_action( 'activate_' . $file, $callback );
}
/**
* Sets 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 $callback The function hooked to the 'deactivate_PLUGIN' action.
*/
function register_deactivation_hook( $file, $callback ) {
$file = plugin_basename( $file );
add_action( 'deactivate_' . $file, $callback );
}
/**
* Sets 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 );
}
}
/**
* Calls 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 WP_Hook[] $wp_filter Stores all of the filters and actions.
*
* @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 );
}
/**
* Builds 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 $wp_filter_id
* in your class and set it to "null" or a number to bypass the workaround.
* However this will prevent you from adding new classes and any new classes
* will overwrite the previous hook by the same class.
*
* Functions and static method callbacks are just returned as strings and
* shouldn't have any speed penalty.
*
* @link https://core.trac.wordpress.org/ticket/3875
*
* @since 2.2.3
* @since 5.3.0 Removed workarounds for spl_object_hash().
* `$hook_name` and `$priority` are no longer used,
* and the function always returns a string.
*
* @access private
*
* @param string $hook_name Unused. The name of the filter to build ID for.
* @param callable|string|array $callback The callback to generate ID for. The callback may
* or may not exist.
* @param int $priority Unused. The order in which the functions
* associated with a particular action are executed.
* @return string Unique function ID for usage as array key.
*/
function _wp_filter_build_unique_id( $hook_name, $callback, $priority ) {
if ( is_string( $callback ) ) {
return $callback;
}
if ( is_object( $callback ) ) {
// Closures are currently implemented as objects.
$callback = array( $callback, '' );
} else {
$callback = (array) $callback;
}
if ( is_object( $callback[0] ) ) {
// Object class calling.
return spl_object_hash( $callback[0] ) . $callback[1];
} elseif ( is_string( $callback[0] ) ) {
// Static calling.
return $callback[0] . '::' . $callback[1];
}
}
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