add_action

函数


      add_action ( $hook_name, $callback, $priority = 10, $accepted_args = 1 )

参数

(string) $hook_name The name of the action to add the callback to.

Required: 是
(callable) $callback The callback to be run when the action is called.

Required: 是
(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.

Required: 否

Default: 10
(int) $accepted_args Optional. The number of arguments the function accepts. Default 1.

Required: 否

Default: 1

返回值

(true) Always returns true.

定义位置

wp-includes/plugin.php , line 441

相关方法: did_action do_action has_action add_option doing_action

引入: 1.2.0

弃用: -

add_action: 这个函数用来向WordPress添加一个新的动作钩。它被插件和主题开发者用来在WordPress执行流程的特定点上执行自定义代码。

为动作钩子添加回调函数。

动作是WordPress核心在执行过程中的特定点，或在特定事件发生时启动的钩子。插件可以指定在这些点上执行它的一个或多个PHP函数，使用行动API。

function add_action( $hook_name, $callback, $priority = 10, $accepted_args = 1 ) {
	return add_filter( $hook_name, $callback, $priority, $accepted_args );
}

add_action

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