#21756 [Opn->Fbk]: Accessing $_SERVER['PATH_INFO '] causes intermittent segfault in Apache

ID: 21756 Updated by: sniper@php.net Reported By: php@lost.co.nz -Status: Open +Status: Feedback Bug Type: Reproducible crash Operating System: Linux/Apache (Debian 3.0r1) PHP Version: 4.3.0 New Comment: Sounds pretty unlikely for the crash being caused by unset variable/array index. And btw. If you conditionally include() files, then you MUST use { } with the clauses: http://www.php.net/manual/en/function.include.php (Example 12-6) Maybe this caused the crashes? Previous Comments: ------------------------------------------------------------------------ [2003-01-19 14:34:35] php@lost.co.nz If the special global $_SERVER['PATH_INFO'] is accessed in scripts on either my test or production server when it is not set (on load of home page usually) it causes Apache to segfault intermittently (like 1/100 page views...). eg, this is what caused me grief: if( $_SERVER['PATH_INFO'] == 'whatever') include( 'whatever_else'); Wrapping in call to 'isset' stopped crashes: if( isset($_SERVER['PATH_INFO']) ) if( $_SERVER['PATH_INFO'] == 'whatever') include( 'whatever_else'); Was really hard to reproduce. In the end I sat at a split screen comparing the error to the access log, second by second. The error log was reporting ~100-300 segfaults a day untill I used the call to isset, when that dropped to zero. (After a fun 6 hours trying to catch it with gdb...) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=21756&edit=1