From: mbechler at eenterphace dot org
Operating system: Any?
PHP version: 5.2.0
PHP Bug Type: Session related
Bug description: Unsetting a session var in a foreach loop over $_SESSION
Description:
------------
When 'register_long_arrays' is enabled and a session variable is unset
within a foreach loop over $_SESSION the session is not written out
anymore, causing the changes to the session beeing lost.
(session_unregister works nice btw.)
Reproduced on various (patched and vanilla) 5.* (including 5.2.0) versions
on GNU/Linux
Some debugging showed that actually the internal pointer (in ps_globals'
http_session_vars zval) to the session hashtable are wrecked when doing
this so this seems not to be a ext/session issue but more of a core
issue.
----
Dump in php_session_flush:
gdb> print (*ps_globals.http_session_vars).value
$5 = {lval = 0x5a5a5a5a, dval = 1.7838867517321418e+127, str = {val =
0x5a5a5a5a <Address 0x5a5a5a5a out of bounds>, len = 0x5a5a5a5a}, ht =
0x5a5a5a5a, obj = {handle = 0x5a5a5a5a, handlers = 0x5a5a5a5a}}
Reproduce code:
---------------
<?php
session_start();
var_dump($_SESSION);
$_SESSION['test'] = 'blubb';
$_SESSION['foo'] = 'test';
foreach($_SESSION as $key => $val) {
unset($_SESSION['test']);
}
var_dump($_SESSION);
?>
Expected result:
----------------
On first run:
array(9) {
}
array(1) {
["foo"]=>
string(4) "test"
}
On second run:
array(1) {
["foo"]=>
string(4) "test"
}
array(1) {
["foo"]=>
string(4) "test"
}
Actual result:
--------------
On every run:
array(9) {
}
array(1) {
["foo"]=>
string(4) "test"
}
--
Edit bug report at http://bugs.php.net/?id=40016&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=40016&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=40016&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=40016&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=40016&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=40016&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=40016&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=40016&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=40016&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=40016&r=support
Expected behavior: http://bugs.php.net/fix.php?id=40016&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=40016&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=40016&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=40016&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40016&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=40016&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=40016&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=40016&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=40016&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=40016&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=40016&r=mysqlcfg
