From:             christian dot cal at gmx dot de
Operating system: Windows XP
PHP version:      5.1.2
PHP Bug Type:     Session related
Bug description:  foreach($_SESSION as $key => $value) unset($_SESSION[$key]) 
crashes apache2

Description:
------------
I am using PHP as an apache2 modul.

When trying to unset all vars that are stored in $_SESSION i use a foreach
loop combined with unset. This method crashes the apache2.


I moved from PHP 4.4.2 to 5.1.2. The unmodified code works for 4.4.2 but
crashes the server when using 5.1.2.

Reproduce code:
---------------
foreach ($_SESSION as $key => $value){
  unset($_SESSION[$key]);
}


Expected result:
----------------
All vars should be removed from $_SESSION

So i tried this:

$helper=&$_SESSION;
foreach ($helper as $key => $value){
  unset($helper[$key]);
}

This code does what I have expected from the code above.

Also this works:

$helper=array_keys($_SESSION);
foreach ($helper as $key){
  unset($_SESSION[$key]);
}



-- 
Edit bug report at http://bugs.php.net/?id=36646&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=36646&r=trysnapshot44
Try a CVS snapshot (PHP 5.1): 
http://bugs.php.net/fix.php?id=36646&r=trysnapshot51
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=36646&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=36646&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=36646&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=36646&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=36646&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=36646&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=36646&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=36646&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=36646&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=36646&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=36646&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=36646&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=36646&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=36646&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=36646&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=36646&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=36646&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=36646&r=mysqlcfg

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