Re[2]: [PHP] if(isset($a)) vs if($a)
| From: | Andrew Perevodchik | Date: | Sat, 15 Sep 2001 06:00:00 +0000 |
| Subject: | Re[2]: [PHP] if(isset($a)) vs if($a) | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-67428@lists.php.net to get a copy of this message | ||
JD> isset checks to see if the $a variable has
JD> been set, ie, if it exists. if($a) checks for
JD> the truthood of $a, meaning, if it has a
JD> non-zero, non-null/empty-string value, then
JD> its true, else, false.
... and if it's not set at all it returns a
warning unless you use "@" :(
--
Andrew Perevodchik
ok@naverex.kiev.ua