@phpdeveloper.org
According to this new post on Daniel Krook's blog today, a Redbook that he coauthored with a group of fellow "IBMers" has been published today - Developing PHP Applications for IBM Data Servers.
The book had three goals; to demonstrate best practices for developing PHP applications with IBM database servers, to provide detailed instructions for administrators to set up all the required software, and to help users migrate from MySQL to DB2.
You can check out the online version of the book here as a PDF file. There's also some additional materials to suppliment it.