Checks if any action has been registered for a hook.

Description

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.

See also

• has_filter(): This function is an alias of has_filter() .

Parameters

$hook_namestringrequired

The name of the action hook.

$callbackcallable|string|array|falseoptional

The callback to check for.
This function can be called unconditionally to speculatively check a callback that may or may not exist.

Default:false

Return

More Information

Since this action is an alias of has_filter() , it also uses the global array $wp_filter that stores all of the filters / actions.

Source

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

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