The book is solid, well written and covers the most important topics that people need to think about when starting off with PHP. It is one of the few PHP book on the market that you can pass on to your trainees/junior developers without having to "unteach" them half of the taught bad practices afterwards. This is a great achievement in my mind and I’d definitely recommend checking it out and passing it on to your trainees and 'junior developers' ... maybe read it first yourself and rip out a few pages in chapter 4.
His "long version" gets into a more complete list of his thoughts on each of the individual chapters (including "object oriented programming", "APIs", "design patterns" and "security"). Overall, he found the book good, but pointed out a few areas where it was lacking. You can find more detail about the book here (or on Amazon here)