Question

Occassionaly I run accross this error in PHP, how can I fix this or what cause it?

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

Answer 1

If your variable names are the same as the session parameters then this version of PHP will incorrectly recognize this as the programmer incorrectly relying on register_globals for session variables. Rename your variables and the warning should go away.

$mySessionVar = $_session["sessionVar"]; 

and not

$sessionVar = $_session["sessionVar"];