note 41717 added to function.preg-match
| From: | dev at popfactory dot com | Date: | Tue, 20 Apr 2004 21:49:21 +0000 |
| Subject: | note 41717 added to function.preg-match | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-68389@lists.php.net to get a copy of this message | ||
As Brion noticed in a previous note, preg_match function may CRASH php apache module (it
doesn't seem to happen in CLI version) if you use this function with a null pattern :
<?php
if( some conditions ) {
$pattern = 'something';
...
}
...
preg_match($pattern,$subject,$matches);
// THIS MAY CRASH !
php?>
To avoid crashes, be sure that $pattern has been defined before using preg_match :
<?php
if( some conditions ) {
$pattern = 'something';
...
}
...
if($pattern) { // $pattern is not null or empty
preg_match($pattern,$subject,$matches);
}
...
php?>
----
Manual Page -- http://www.php.net/manual/en/function.preg-match.php
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