Am Montag gehts wieder auf Schicht. Drum zur Einstimmung schon mal ein paar PHP-Geschichten:

Bei Zend.com findet man eine Einführung in Objekt-orientierte Programmierung mit PHP (5):

If you've been programming for a while, you've probably heard the term OOP before - it stands for Object Oriented Programming, and refers to a technique whereby you create program "objects" and then use these objects to build the functionality you need into your program. PHP 5.x is very big on OOP - it comes with a brand-spanking-new object model which finally brings PHP objects into conformance with standard OOP principles and offers OO programmers a whole bunch of new goodies to play with.

( via The Farm )

PHP Debugging Basics  
If you're new to Web development and are trying out PHP 5, here's a good article to read.

Simplify Business Logic with PHP DataObjects   
DataObjects are based on the Data Access Object and Transfer Object patterns and are classes that represent tables in databases/ They simplify database access and are explained in this OnLAMP.com article.

( auch via The Farm )