There's a new article posted over on the IBM Developerworks site today from a sumbission by solrac at IBM - Advanced PHP V5 objects - Create reusable, extensible, and scalable PHP code.

In this new installment, the follow-up to their getting started article, they talk about some of the more powerful aspects of PHP5's objects and how to use them to create "reusable, extensible, and scalable code".

They start off with type hinting, moving futher on to method overriding, to abstract classes/methods, and creation of some of the interfaces that are now possible...