Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent PHP Book

Professional PHP4 Programming is the newer version after "Professional PHP" by Wrox. A lot of information regarding sessions and some on security. I would have liked more case examples, such as this book's previous version used. Granted, most examples are not adequate as full-blown applications, but they give you a good idea on how to structure your programs. NOT for the beginning PHP programmer; if you're unfamiliar with PHP, look for "PHP Fast & Easy Web Development" by J. Meloni, as it has a lot of simple applications to get you started.In all, this is an excellent book; it's also very useful as a reference on the subject. I'm giving it four stars instead of five because, as stated, some example apps. would have been helpful.