Hello, I'm beginning to learn about PHP Scripts. I saw the term "callback" on Google on a couple of websites, but there weren't any good info on what it is. I think I should clarify on link callbacks If I am understanding correct, callbacks are just links that link back to the original developer? Can they be automatic or does the user have to request it (i.e. pushing a link button). Can the callback be encrypted or are they only a few codes that will allow callbacks? Thanks!