Your script possibly relies on a session side-effect < Am getting this error?

[c_shelswell]

Hi i've started getting a strange error which is:

 

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

 

I've done a bit of searching but am still unsure as to what's causing it. Could it be this part of my code is the issue:

 

$_SESSION['order'] = $_GET['od'];
        $_SESSION['mid'] = $_GET['mid'];
        $_SESSION['qty'] = $_GET['qty'];
        $_SESSION['thisuser'] = $_GET['user'];

 

Cheers for any help