Zend Certified
Recently I received my certificate after passing Zend PHP 5.3 exam. I am glad I passed it, there were some stuff I didn’t know very well about before preparation, like namespaces, late static binding, etc. The study guide that goes with exam purchase is pretty decent. I liked its minimalistic approach, so it just tells you the main points and what topics are covered on exam. All other information and detailed explanations should be looked on php.net. I got many questions about “final”, “static” keywords, object inheritance. There are many questions with code examples, where you should guess the output.
Here is a good article about what is covered on exam: http://devzone.zend.com/article/12647
