tricky interview question for experienced php web developer

Question

Possible Duplicate:
What PHP-specific questions would you ask in a job interview?

I need to interview some experienced php web developers, some of them with zend certification. Just asking them some php/mysql questions is not enough so I need to test at least the following abilities:

• abstract thinking
• self initiative
• application design capabilities
• team spirit

It will be great if the question will require php development.

I've already selected 15 php/mysql questions, most of them inspired from the zend certification exam. What I'm looking for is some web architecture questions, something like "Design the application flow for some on-line wines shop".

Answer 1

I am sure you have already looked, but there are a pile of questions which are tagged php + interview-questions - might be a good place to start.