Screaming Penguin - Source Does Matter

devshed has a nice tutorial series (1,2,3,4, and the one this article pertains to 5) going on PHP. The latest installment deals with the file system functions of PHP (which are very extensive and powerful, I have actually written a few database-less apps that use the directory structure and arrays of files, lines and characters to emulate a database.) PHP is good stuff, checkit (these are fairly intro tutorials, but they are worth a look to the uninitiated.)

on intro PHP   PHP file system functions tutorial: devshed