That is standard I expect when I see the "The Good Parts" label on a book published by O'Reilly. Much to my disappointment, I did not experience anything approaching that same level of quality or discussion in PHP The Good Parts. This book is written only for a novice programmer, and I might even argue an individual who has never written code. It does not promote the best practices of our industry, nor discourage the bad. For example, the use "define" is encouraged within the first few chapters. Although, listed as the first item of the bad parts, "goto" is listed among the good parts! How can "goto" ever be considered a good part of a modern language that offers classes and other complex flow structures???
I would not recommend this book to any developer I want working on my team. I would not recommend this book to someone looking to learn how to program.
I propose the book either be taken off the market or renamed to "PHP, Parts."