The Zend Developer Zone has posted a sample chapter from a new book Packt Publishing has put out called "Pro PHP, Patterns, Frameworks, Testing and more by Kevin McArthur.
So today you get a double bonus. You get to check out Pro PHP, Patterns, Frameworks, Testing and more by Kevin McArthur. You also get a great tutorial on SPL!
The sample chapter looks (obviously) at the SPL, the Standard PHP Library - functions included with PHP5 releases to accomplish some pretty cool things.