PHP Manual

Im not sure if I already brought this up. I looked through every page to see and didnt find it so here it goes.

Like WikiPedia has, when someone makes a entry they can use [[word]] and it will create a link to the subject manner inside of it. http://en.wikipedia.org/wiki/Php if you go to the edit page you can see what I mean. [[programming language]]'s link goes to http://en.wikipedia.org/wiki/Programming_language. Something like this might be interesting to use with the programming forum and PHP manual.
http://us3.php.net/function.header takes you to the description of the function header http://us3.php.net/function.mail takes you to the description of the function mail, and so on. If its not there then it submits it to a search that brings up related functions.