has_action( string $tag, callable|bool $function_to_check = false )

Check if any action has been registered for a hook.


Description Description

See also See also


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Parameters Parameters

$tag

(string) (Required) The name of the action hook.

$function_to_check

(callable|bool) (Optional) The callback to check for.

Default value: false


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Return Return

(bool|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.


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More Information 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.


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Source Source

File: wp-includes/plugin.php

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


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Changelog Changelog

Changelog
Version Description
2.5.0 Introduced.

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