As for any PHP4-Specific behaviour, not sure. I think all of the code is ambiguous. No PHP OO activity or anything. No usage of $_SESSION...I think it's all cross-compat with 4 and 5
Somebody actually wanted a solution over at DevShed. They wanted links for days 1 - n of the current month. This was a joke-solution (although a functional one) for their problem. I thought it was funny
I was mostly curious if anybody here had every done anything similar as a joke.