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Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of dat

Posted on 2010-11-16
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Last Modified: 2012-06-27
Hi,

Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively in Unknown on line 0

Above is the warning I receive on some on my pages, a common topic on ee, is this regarding the code below? If not how do I find the line it refers to as the warning states line ‘0’

<?php
session_start();

if (!$_SESSION["valid_user"])
{
// User not logged in, redirect to login page
Header("Location: login.php");
}

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Question by:AlexAmbler
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3 Comments
 
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Expert Comment

by:Ray Paseur
ID: 34151983
It's a configuration variable.  Assume you are at PHP 5+, right?  Ask your hosting company to turn this old thing off.
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Accepted Solution

by:
Ray Paseur earned 1000 total points
ID: 34151987
However that said, this is not a good form of code:

if (!$_SESSION["valid_user"])

Maybe you wan to be more at this:

if (!isset($_SESSION["valid_user"]))

The values for FALSE are loosely typed in PHP.  If you tighten up your code, you will almost certainly get better outcomes.
0
 

Author Closing Comment

by:AlexAmbler
ID: 34209855
thank you.
0

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