PHP: includig global.php outside of forum

[Swedie]

Okay, including the global.php file isn't all that hard, but what I've noticed is a problem is that ANYTHING put in a $string before I include the global.php is removed / dumped and ... NULL... this messes up my scripts. I need to figure out a way of keeping the value of a $string I set before the inclusion..

please help me with this.

Okay, to detail the issue a little, here is my header.php file:

$currentdir = $_SERVER['DOCUMENT_ROOT'];

chdir("/home/sporthoj.com/www/www.sporthoj.com/forum");
require("./global.php");
if($currentdir) {
chdir("$currentdir");
}
else
{
chdir("/home/sporthoj.com/www/www.sporthoj.com");
}

You might see what I am trying to do. I am including the global.php file from other directories and need to return back to the original directory. but it just don't work because the value of $currentdir is set to NULL after the global.php file has been loaded.

How I know:
Because if I echo $currentdir before requre() there is a value inside it. But when I echo AFTER require, the value of $currentdir is no longer present.