This review is from: PHP Developer's Dictionary (Paperback)
I'm only giving this four stars because the information is freely available elsewhere. Nonetheless, this book is a wonderful reference to have on hand. It's the only PHP book (and I have plenty) that consistently sits on my desk. I find it to be a valuable reference tool for quick lookups, and for finding functions that I'm not sure how to spell.
It's a dictionary--not a tutorial. It doesn't teach you how to write your code (when was the last time you used a regular dictionary to come up with structure and form for a poem? You don't. You use it to look up words.) If you're looking for tutorials, you'd be better off looking elsewhere. If you use PHP day in day out, you might find having a paper reference on your desk to be helpful. Sometimes you just don't want to have to call up another web browser to search php.net, or wait until your DSL provider decides to spring back to life and allow you to search the net for a bit of syntax that has slipped your mind. The price is right, and it's a good reference book to have in addition to a book of tutorials or other learning material.