PHP And Inventory

I am wondering if anyone knows of a inventory control system that is built on a PHP/MYSQL platform. I am undergoing building one for my company although I can write HTML code this new project has forced the task of learning PHP so far I have understood it and seems fairly simple. I am going to continue on and master the language but I have always had the point-of-view of why reinvent the wheel so that is where my questions comes in does anyone know of any good sites for PHP/MYSQL proggies. I have browsed HOTSCRIPTS and can't seem to find anything worth while in that aspect.
- a*user

For php.. there is only one site php.net

It has all the info you want (and more).. And loads of examples.

You might also want to look at this project http://sourceforge.net/projects/phpwims/
Allthough their own site gives php errors (click Home Page) so it might well not be any good..