Harry Fuecks's wiki site devoted to design patterns in PHP.

An article from 2003 about 3 tier architecture and MVC.

An excellent reference for learning about the MVC design pattern.

Learn more about the Front Controller design pattern, a pattern that describes a way to centralize processing in a web-based application.

If design patterns aren't exclusive to architecture astronauts, what are they, and why are they useful in PHP applications? This article explains.