From:             
Operating system: Windows
PHP version:      5.3.6
Package:          Regexps related
Bug Type:         Bug
Bug description:Regexp crashes Apache/PHP

Description:
------------
---

>From manual page: http://www.php.net/function.preg-replace#Description

---

Calling the script below apache crashes on windows installations. After
removing almost any of the lines inside $notworking apache will NOT crash,
no matter which line was removed in most cases.





Here is the system list that causes a crash or not:



Windows 7 SP1 (64bit) | XAMPP | Apache/2.2.17 (Win32) | PHP 5.3.5 | <<<<<<<
CRASH!

Windows XP (32+64bit) | XAMPP | Apache 2.2.17 | PHP 5.3.5 | <<<<<<< CRASH!

WinXP 32Bit / Apache 2.2.17 / PHP 5.2.14 <<<<<<< CRASH!

Fedora 32Bit / Apache 2.2.15 / PHP 5.3.3 --> OK

Ubuntu 10.10 32Bit / Apache2 2.2.16 / PHP 5.3.3 -> OK

Test script:
---------------
<?php

echo 'Is the following crashing apache or whatever?<br />'.PHP_EOL;



// After removing almost any of the lines inside $notworking apache will
NOT crash, no matter which line was removed in most cases.



$notworking = '<?php



//<*IslandStorageBase:start*> DO NOT CHANGE THIS COMMENT!

/**

* Automatically generated BaseObject for IslandStorage. !!DO NOT CHANGE
THIS BASE-CLASS!!

* CHANGES WILL BE OVERWRITTEN WHEN UPDATING!!

* You can change class "IslandStorage" which will extend this base-class.

*/

class IslandStorageBase extends AbstractSimpleStorage {

}

<*IslandStorageBase:end*>

?>';



$content = preg_replace(

  '%//<\*IslandStorageBase:start\*>(.)+<\*IslandStorageBase:end\*>%s',

  'test',

  $notworking

);



echo 'If you can see this everything seems to be working fine.';



?>

Expected result:
----------------
Is the following crashing apache or whatever?

If you can see this everything seems to be working fine.

Actual result:
--------------
Apache crashes with the following log entry:



Parent: child process exited with status xyz -- Restarting.

-- 
Edit bug report at http://bugs.php.net/bug.php?id=54317&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=54317&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=54317&r=trysnapshot53
Try a snapshot (trunk):              
http://bugs.php.net/fix.php?id=54317&r=trysnapshottrunk
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=54317&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=54317&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=54317&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=54317&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=54317&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=54317&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=54317&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=54317&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=54317&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=54317&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=54317&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=54317&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=54317&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=54317&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=54317&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=54317&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=54317&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=54317&r=mysqlcfg

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