has_action() WP 1.0

Check if any action has been registered for a hook.

Notes:

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

Works based on: has_filter()

✈ 1 time = 0.000016s = very fast | 50000 times = 0.03s = speed of light

No Hooks.

Return

true/false/Int. If $function_to_check 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. When using the $function_to_check 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.

Usage

has_action( $tag, $function_to_check );

$tag(string) (required): The name of the action hook.
$function_to_check(callable/true/false): The callback to check for.
Default: false

Code of has_action: `wp-includes/plugin.php` ^{VER 4.9.8}

<?php
function has_action($tag, $function_to_check = false) {
	return has_filter($tag, $function_to_check);
}

Related Functions

From tag: Actions (hooks)

remove_action()