Homebrew TrackBack Tutorial
by Volker Weber
What is TrackBack? Basically, it's a way of recording who has linked to your posts and notifying others that you've linked to them (invented by the folks from Moveable Type).
Because I haven't seen any documentation or tutorials about how TrackBack works, I'm going to summarize what I've managed to observe about TrackBack behavior and how I added it to my homebrew PHP/MySQL CMS.
