has_action() WP 1.0

Check 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.

No Hooks.

Return

true|false|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.

Usage

has_action( $hook_name, $callback );

$hook_name(string) (required)

The name of the action hook.

$callback(callable|false)

The callback to check for.
Default: false

Notes

• See: has_filter() has_action() is an alias of has_filter().

Changelog

Code of has_action() has action ^{WP 5.8.1}

function has_action( $hook_name, $callback = false ) {
	return has_filter( $hook_name, $callback );
}

Related Functions

Actions (hooks)

Hooks (actions, filters)