I don't understand this :
Once you have downloaded and extracted the framework, you should add the /library folder in the distribution to the beginning of your include path. You may also want to move the library folder to another – possibly shared – location on your file system.
What to do with this?
This tutorial assumes that you are running PHP 5.3.3 with the Apache web server and MySQL, accessible via the PDO extension. Your Apache installation must have the mod_rewrite extension installed and configured.
Obviously you need to have PHP installed and configured if you are going to try programming with it. There are packages like WAMP and XAMPP that include Apache, PHP, and MySQL as a bundle.
Is PHP working? You can create a phpinfo page and run it, and it will tell you where the php.ini is that it is using. It might be in your windows directory also. Create a file with this and run it in your browser: