[Sparkz]

First of all, there is no need in bouncing off the walls here. You asked a very general question, and I provided you a link to help. Have you even searched the web to look for something that might help you?
That link I gave you was the first result of my search on google.

You cannot include an xml file directly into your page. It has to be parsed somehow - period.

As for the different PHP-files, of which you have provided no examples, depending on what output they give, you might or might not get away with just including it on your page.