Use Apache Friends XAMPP. It will set up Apache HTTP server, PHP 5 and MySQL 5 (as far as I know, there's probably some more than that). You don't need to know how to configure apache (or any of the modules) to use it.
You will have an htdocs directory which Apache will serve (accessible by http://localhost/) and should be able to put your PHP files there. With my installation, it is at C:\xampp\htdocs.