Bug #76358 [NEW]: Cannot change session name when session is active

From: Date: Sun, 20 May 2018 17:19:53 +0000
Subject: Bug #76358 [NEW]: Cannot change session name when session is active
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-215305@lists.php.net to get a copy of this message 
From:             tony at marston-home dot demon dot co dot uk
Operating system: Windows 10
PHP version:      7.2.5
Package:          Session related
Bug Type:         Bug
Bug description:Cannot change session name when session is active

Description:
------------
This error was introduced in 7.2 for no good reason. I have been using
this technique since 2003 to enable a user to have multiple sessions on
the same PC, each with its own name and ID. This now fails.

I know that https://bugs.php.net/bug.php?id=75650 has declared
that this
not a bug, but I strongly disagree.

Why was this change made? What was the reasoning? If this usage does not
cause a problem in the engine then why is it now being disallowed? If
this is someone's idea of "purity" then that someone needs a good
talking to as this is overstepping the mark.


Test script:
---------------
session_start();
$old_name = session_name('NEWSESSION');  // with 7.2 this now returns
FALSE
session_regenerate_id();
… do something
session_name($old_name);  // with 7.2 this now fails as $old_name is
FALSE

Expected result:
----------------
I expect session_name() to do what it has been doing for the past 15
years, that is to return the existing session name while assigning a new
one. The documentation clearly states "Get and/or set the current
session name", and the "and/or" indicates that it should be able to do
both at the same time.

Actual result:
--------------
session_name() returns FALSE instead of the current session name.

-- 
Edit bug report at https://bugs.php.net/bug.php?id=76358&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=76358&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=76358&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=76358&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=76358&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=76358&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=76358&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=76358&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=76358&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=76358&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=76358&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=76358&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=76358&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=76358&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76358&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=76358&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=76358&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=76358&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=76358&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=76358&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=76358&r=mysqlcfg

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