Our Scripts Vault contains many game scripts that you can use to create your own game!
I found the old Exofusion/SilentStalk game code that I've had for years now. Its very poorly coded and doesn't work with register globals off. I was going to go though the code and first make it functional. Then was thinking that we could do like a community project. Whoever wanted could download the base functional program, then we could make updates and post them here in the forums. That would be a way for those who wanted to learn some php a sort of hands on refernce and you would also have a small game for yourself as well. Anyone interesed in something like that?
You can setup a dev server on your home pc. In fact you will need one in order to do any php coding.
I don't know how much help I could be, as I don't currently know any php, but I might enjoy it for the learning experience