Dear Dai,
Wiley purchased Beginning PHP 4. The book is in our current catalog at wrox.com but we are unable to make direct sales at this time at wrox.com. We are also looking to revise this book soon for PHP 5. Also, our open source editor Debra Williams Cauley is looking into several PHP and MySQL topics to publish now into Wrox Press.

Thanks for your interest!
Jennifer Bergman
Marketing Manager
Wiley Publishing/Wrox Press