Download and install http://www.wampserver.com/ (open source project, free to use)
Apache 2.2.11
PHP 5.3.0
MySQL 5.1.36
Phpmyadmin
size: 16Mo

– then you have a PHP webserver + mySQL database on your computer.

After installation you need to configure 2 small things:

-install php version 5.2.9-1 (click ‘get more’)

-Activate ‘rewrite module’ in Apache – modules (to have friendly url’s)