It's a nice article, short and simple.

However, I would have liked if you specified one of the main problems I've seen with beginners (including me) which is that the file must be on a location available to the server. Most of us have been bitten by this problem using a local address instead of the address the server needs (or putting the file on the server).

Another improvement would have been to include some references for more information such as how to make it dynamic or how to use format files.