How you prepare will depend on your experience. I’ve been using PHP for 8 years so most of my time was spent filling in the gaps. For example, they could ask a question on any array function so I needed to learn the ones I rarely use. To help prepare I used -

1. The php|architect’s Zend PHP 5 Certification Study Guide which provided a great overview of the topics included in the exam.
2. The php|acrhitect’s mock tests to help get into the mindset of the types of questions they ask, how they ask them and how they expect them to be answered.
3. The PHP manual so I had at least seen all of the functions in the areas the exam covers.

Good luck.

Could you advise on how you prepared for the exam. Did you get any study material? Where did you take the exam? Online?

cheers,
Jeffery