WordPress at a glance

has_action() WP 1.0

Check if any action has been registered for a hook.

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.

Works based on: has_filter()
1 time — 0.000016 sec (very fast) | 50000 times — 0.03 sec (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.

Usage

has_action( $tag, $function_to_check );
$tag(string) (required)
The name of the action hook.
$function_to_check(callable|false)
The callback to check for.
Default: false

Notes

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

Changelog

Since 2.5.0 Introduced.

Code of has_action() WP 5.7.1

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

From tag: Actions (hooks)

More from category: Hooks (actions, filters)

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