System independence?

Hi ! the last 5 minutes I sat on my toilette in my green-blue-white-colored bathroom an thought about the following: is PHP-GTK (or more precisely PHP) System-independent? I've read a few mails and other things in the web, where explicitely was said, it would be, and this would be the bit advantage of it. But: I don't think so, because it is not System-independend it only runs on different Systems. Point 1: You have to know what system PHP runs on, to include the php-gtk-module (.so or .dll). Now lets say theres a third OS, where the module ends on .xyz - this is a little big problem, because I have to know that - but perhaps I don't. It would be better, if you have to load "php-gtk" - and PHP itself adds the correct .dll or .so or .xyz or whatever. Point 2: The bigger problem are the differences between Linux and Windows, if you use PHP on your Desktop: Home-Directory under Linux, Desktop-Directories under Linux (Gnome, KDE,...) and Windows and so on. Perhaps it would be good to implement functions/methonds for the different OSes in a way PEAR does for example for the different types of databases. I think it is very important to think and discuss about that, if PHP and PHP-GTK shall have big success. Some of the Problems are more PHP-general-related, some more PEAR (there's a System-Class), but its all also gtk-related in some way... Christoph