note 9690 modified in isset by zak
| From: | zak@php.net | Date: | Thu, 23 Nov 2000 03:07:35 +0000 |
| Subject: | note 9690 modified in isset by zak | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-8015@lists.php.net to get a copy of this message | ||
isset() will return false if testing a variable that has been set to NULL.
For Example:
$foo = NULL;
print isset ($foo); // Returns FALSE
Also note that a null byte ("\0") is not equivalent to the PHP NULL constant.
http://www.php.net/manual/function.isset.php