The status of the classic reaches the book is not alone by his verbosity. On The Contrary. Four years after the release there are some minor omissions in the content, and a new, revised edition would be very desirable.
In direct comparison to a recently published book, in which a chapter also describes the development of PHP extensions, the class of the book catches your eye. It is accurate and it is logically organized, as you'd expect from a classic.
And it's been proven in practice, as I can tell from my own experience.
5/5 stars: where is the revised version?