If you're looking for a good PHP resource, check out this list from Top-books.org - a listing of PHP and web-related books ranked by their Amazon ranking.
Included in the list are books like:
- Luke Welling and Laura Thomson's PHP and MySQL Web Development
- Beginning PHP and MySQL 5: From Novice to Professional, Second Edition by Jason Gilmore
- Chris Snyder and Michael Southwell's Pro PHP Security (Pro)