As of PHP 4.20, register_globals defaults to off. While this was done 
for valid security reasons, I've never experienced any problem in 3 
years of running PHP with register_globals turned on, so I'm leaving it
that way (on my servers) and not rewriting my scripts just yet.

In the meantime, the following acts as a workaround. It will ensure 
that the scripts work properly, even if you're running with PHP 4.20+ 
and register_globals off:

<?
if(phpversion() >= "4.2.0"){
   extract($_POST);
   extract($_SERVER);
   extract($_ENV);
}
?>

I've already added this hack to most of my scripts. If you see one I 
forgot, feel free to add it in yourself.