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

引入: 1.2.0

弃用: –

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.

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

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