PHP learning projects

This may be an odd request, but I'll try to explain.

Well I have looked through quite a few tutorials. And I pretty much cover the basics (variables, arrays, if tags etcetera) But theory is one thing, the other thing is actually using it. But my brain is quite un-inspirational at the moment. So I'm asking if anyone knows a small project I could make to enhance and test my php skills?

Thanks in advance.

A forum. Or an imageboard.

(I'd rather you wait until something does arise, instead of trying to make a contrived example of it.)