From: antonio04 at gmail dot com
Operating system: FreeBSD 7.2
PHP version: 5.3.1
PHP Bug Type: Session related
Bug description: If session var is NULL, value will be overwritten by global
with same name
Description:
------------
When you have a session variable whose whose session array key is
defined but with a NULL value, this variable acts as if register_globals
were enabled, i.e. any value set to a global variable of the same name
is stored in the session as this key's value.
Once the session variable's value has been changed to something not
null, this behavior ceases.
A cursory search in the archives shows that this issue was categorized
as a bogus bug report six years ago (#28482), but the reason given does
not make sense, as the session variable key certainly does exist and
acts unexpectedly when initialized to NULL.
Thanks!
Reproduce code:
---------------
<?php
/* Script 1 */
session_start();
init_set('register_globals', 0);
$_SESSION['foo'] = NULL;
$foo = 'bar';
?>
<?php
/* Script 2 */
session_start();
var_dump($_SESSION['foo']);
?>
Expected result:
----------------
Script 1:
Script 2:
Notice: Undefined index: foo in /home/www/interpals/test.php on line 3
NULL
Actual result:
--------------
Script 1:
Script 2:
string(3) "bar"
--
Edit bug report at http://bugs.php.net/?id=51120&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=51120&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=51120&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=51120&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=51120&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=51120&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=51120&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=51120&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=51120&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=51120&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=51120&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=51120&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=51120&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=51120&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=51120&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=51120&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=51120&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=51120&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=51120&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=51120&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=51120&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=51120&r=mysqlcfg
