has_filter()

最后更新于：2021-11-27 04:51:57

Checks if any filter has been registered for a hook.

参数

$hook_name

(string) (Required) The name of the filter hook.

$callback

(callable|false) (Optional) The callback to check for.

Default value: false

响应

(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.

源文件

文件: gc-includes/plugin.php

function has_filter( $hook_name, $callback = false ) {
	global $gc_filter;

	if ( ! isset( $gc_filter[ $hook_name ] ) ) {
		return false;
	}

	return $gc_filter[ $hook_name ]->has_filter( $hook_name, $callback );
}