has_action ( $tag, $function_to_check = false )

  • (string) tag The name of the action hook.
  • (callable|false) function_to_check Optional. The callback to check for. Default false.
  • (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.
Defined at:


Checks 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.

Related Functions

add_action, do_action, did_action, doing_action, has_category

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