has_action( string $tag, callable|bool $function_to_check = false )
Check if any action has been registered for a hook.
Description
See also
has_filter(): has_action() is an alias of has_filter().
Parameters
- $tag
-
(Required) The name of the action hook.
- $function_to_check
-
(Optional) The callback to check for.
Default value: false
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 $function_to_check argument, this function may return a non-boolean value that evaluates to false (e.g.) 0, so use the === operator for testing the return value.
Source
File: wp-includes/plugin.php
function has_action($tag, $function_to_check = false) {
return has_filter($tag, $function_to_check);
}
Changelog
| Version | Description |
|---|---|
| WP-2.5.0 | Introduced. |