(please move if this is in the wrong place)
I need to know how to make a wiki. Can anyone explain how to? Or direct me to a page with a tutorial. I don't want a service that will provide we with a wiki I want to make my own.

What scripting languages do you have access to? PHP would be my weapon of choice, but there are things such as ASP and perl which would be just as good.

I'm not sure about tutorials on how to create a new wiki from scratch. As they say theres no point re-inventing the wheel, why not base it on an existing one?

A good place to start is www.opensourcecms.com where they have several wikis installed for you to play around with. When you've found the one with the sort of features you'd like. You can then download it and look through the source to get a feel for how its constructed.