php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #29253 array_diff with $GLOBALS argument fails apache.(zend optimizer running)
Submitted: 2004-07-19 09:58 UTC Modified: 2005-08-10 09:45 UTC
From: camka at email dot ee Assigned:
Status: Closed Package: Arrays related
PHP Version: 5CVS, 4CVS (2004-08-01) OS: *
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: camka at email dot ee
New email:
PHP Version: OS:

 

 [2004-07-19 09:58 UTC] camka at email dot ee 
Description:
------------
when using array_diff with one of the parameters is $GLOBALS seems like the whole variable scope is messed up. 


Reproduce code:
---------------
<?php
$zz = $GLOBALS;
$gg = 'afad';
var_dump(array_diff_assoc($GLOBALS, $zz));
echo $gg; // strange behavour. $gg is like an array!!!
// var_dump($gg); // this call fails apache
?>

Expected result:
----------------
expect seeing 'afad' and empty array;

Actual result:
--------------
array(0) { } Arra

the length of "Arra" string depends on the length of $gg length;

if uncomment the last line - apache child fails
[Mon Jul 19 10:26:00 2004] [notice] child pid 10946 exit signal Segmentation fault (11

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2004-07-20 14:40 UTC] camka at email dot ee 
last win snapshot
<?php
error_reporting(E_ALL);
$zz = $GLOBALS;
$ff = 'ff';
array_diff_assoc($GLOBALS, $zz);
var_dump($zz); // this line crashes apache when optimizer is running
?>

when optimizer is disabled gives the following notice message and doesn't crash

Notice: Undefined variable: zz in c:\wwwww\test\crashme.php on line 7
NULL 

seems like array_diff parameters are being unset inside the function
 [2004-08-07 13:42 UTC] andrey@php.net 
To my knowledge array_diff* do not unset anything. I confirm the behaviour under 5.1.0-dev (of 7.Aug.2004) as well as with 4.2.3 (so this problem exists also in the old implementation of the function). The problem appears when only $GLOBALS is used, and the latter is a variable (array) with specific behaviour. Unfortunately I wasn't able to reproduce similar problem with one of the other array functions.
 [2005-08-10 09:44 UTC] dmitry@php.net 
Fixed in CVS HEAD (6.0), PHP_5_1, PHP_5_0 and PHP_4_4.
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Thu Nov 21 12:01:29 2024 UTC