Making friends is fun
So that's really all there is to it. You can take it much farther and code an entire site like using this method and not just part of a site (such as articles). There are lots of different methods you can use to pass and parse data out of the REQUEST_URI. I have done this two different ways and here are examples of that:
If you use what you read here for a website then I'd love to know about it. Send me an email with urls and whatever other personal information you want to supply me with.