Hey guys just the other day I came across this lifehacker article about how to get a free education online in which you can learn from lectures from top universities with out getting credits nor a degree, but you can still learn.
http://lifehacker.com/5615716/where-to- ... ion-online

This site and coarse here will teach you how to build dynamic websites using php which teaches most of the basics and gets you into very advanced code using xml and ajax. After watching the videos and attempting to build the code you will be able to understand our code and build new addons for the community with ease.
By the way this coarse is from Harvard
http://academicearth.org/courses/buildi ... c-websites