← All built-ins / is_null()
is_null()
is_null(mixed $number): bool
Parameters
| Name | Type | Description |
|---|---|---|
| $v | mixed | value to test |
Return value
true when the value is null.
Example
$x = null; var_dump(is_null($x)); var_dump(is_null(0));
bool(true) bool(false)