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Bug #19429 Using $GLOBALS in the global variable scope causes a segmentation fault
Submitted: 2002-09-16 04:29 UTC Modified: 2002-09-16 06:59 UTC
From: dragon at wastelands dot net Assigned:
Status: Not a bug Package: Reproducible crash
PHP Version: 4.2.2 OS: Slackware Linux 2.4.5
Private report: No CVE-ID: None
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From: dragon at wastelands dot net
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 [2002-09-16 04:29 UTC] dragon at wastelands dot net 
I typically write my code on a local machine running 4.1.2.  The following code works fine on my local machine, but causes a segmentation fault in the apache child sending the page, which is on the server using 4.2.2.

The offending line was:

foreach ($vars as $var) if ($GLOBALS["$var"]) { $prosql = 1; $websql = 1; }

Obviously it is quite stupid trying to access global variables like this from within the global scope, but this line got moved from a function at some stage and obviously I didn't change it.

Anyways -- stupid code shouldn't crash the server.  and it took me long enough to even find the offending line.

changing the middle part to "if ($var)" promptly fixed the problem.

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 [2002-09-16 04:48 UTC] dragon at wastelands dot net 
ok obviously the ($var) isnt actually referencing the global variable, so this wasn't the problem.  im still trying to work out the real problem (seems to be accessing an array from a form submission which has nothing in it) but I will post a separate bug report when I work out exactly what is wrong.
 [2002-09-16 06:59 UTC] sniper@php.net 
In PHP 4.2.0, the 'register_globals' setting default changed to
'off'. See http://www.php.net/release_4_2_0.php for more info.
We are sorry about the inconvenience, but this change was a necessary
part of our efforts to make PHP scripting more secure and portable.


And $GLOBALS["$var"] should be $GLOBALS['var'] (without the $).
 
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