include() trashing vars...

[vt_dave]

Hello all, thanks in advance for any help you can lend me!

I have a simple menu that runs off the $_GET vars in the url, if no "mode" is present I default it to main.

After stuffing the session with a lengthy array and a few objects, if I click "home" so no ?mode= is set, my home page defaults my $mode = "main"

Before the set, $mode outputs to be empty, after the set in the same page it says "main" however, after i include my header, the $mode outputs to "\x01"

This is an odd value because nothing has referenced the $mode and the error_log("header mode=".$mode) is the first statement in that file. In adition "x01" is not located in $SESSION, $POST, $REQUEST, $SERVER

After the include and back in my home.php, mode is now empty....odd!

Something is trashing my temp global variable, does anyone have any idea what it could be?

Specs:
Windows XP Home
Apache 1.3.33
PHP 4.3.10
MySQL 4.0.23

PHP.ini
register_globals = Off
session_autostart = 0

Thank you for your time!
-Dave

[vt_dave]

Thanks all who viewed, I think i have figured it out:

After reading about adding
error_reporting(E_ALL);
to get full error reporting i found various stpuid mistakes in my code, but none fixed the problem. What DID fix the problem was ALWAYS ALWAYS unsetting a session variable BEFORE resetting it. It sounds simple, but i thought saying $SESSION['someuser']=userObject; would just re-initalize itself if i overwrote it:
$SESSION['someuser']=userObject2;

this was crapping on various variables and quite a pain to debug, the fix is to always unset your session var before re-assigning it:
$SESSION['someuser']=userObject;
unset($SESSION['someuser']);
$_SESSION['someuser']=userObject2;

This seems to have fixed everything nicely.

Thanks
-Dave