I've just finished reading this book 'cover to cover' and I can say it was one of the better 'learning PHP' books.
David Powers has a nice writing style which is clear, informative and engaging.
The book, alike most, introduces concepts by slowly walking you through examples stage by stage, so that you can make sense of it when you are presented with the 'full code' at the end of the chapter. Only problem here is that he says the full code is available online, at a certain address, which I couldn't find, so I typed up the examples myself to read through them, which I didn't mind really as I think that was more 'hands on' style learning.
Only little downside 'for me' is that I read this book hoping it would prime me to walk straight into learning a framework, however, after searching round, I've realized, 1) there are too many to choose from 2) there doesn't seem to be any 'quality' books on here that can 'easily' teach you about them 3) if honest, I've only been learning PHP (and programming for that matter) since January through avidly reading books bought on here, so I think I'm being a little too ambitious really.
Toodles.