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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 Optional. 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() This function 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.* @return mixed The filtered value after all hooked functions are applied to it.*/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 ( str_starts_with( $file, $realdir ) ) {$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( $args );}/*** Builds a unique string ID for a hook callback function.** Functions and static method callbacks are just returned as strings and* shouldn't have any speed penalty.** @link https://core.trac.wordpress.org/ticket/3875** @since 2.2.3* @since 5.3.0 Removed workarounds for spl_object_hash().* `$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];}}