Perhaps if you're nice enough, the PHP staff here will give you a SQL dump of their DB and you can perform your own SQL queries on it.
Maybe not. 🙂
The best thing I'd do is do research on Google for different PHP user groups. For example, I live one county north of Broward county (close to Miami-Dade) and there is a Broward PHP user's group which I've joined. Perhaps a search for "php +philadelphia" might be in order.