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() has action WP 5.7.1
function has_action( $tag, $function_to_check = false ) {
return has_filter( $tag, $function_to_check );
}