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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.

1 time — 0.000016 sec (very fast) | 50000 times — 0.03 sec (speed of light)

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

Changelog

Since 2.5.0 Introduced.

Code of has_action() WP 5.8.1

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

Actions (hooks)

Hooks (actions, filters)

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