if your server does not support PHP, you must install PHP.
Here is a link to a good tutorial from qualitypoint on how to install PHP5: http://qualitypoint.blogspot.com/2009/09/steps-for-php-installation.html
Download PHP for free here: http://www.php.net/downloads.php
Download MySQL Database
Download MySQL for free here: http://www.mysql.com/downloads/
Download Apache Server
Download Apache for free here: http://httpd.apache.org/download.cgi