Quite a nice book. I wouldn't say it's a "must have", because some topics were only given a brief outline. I wonder why the authors included those paragraphs where they didn't give the topic a full coverage, but presented a short summary and said "You should already know this". Why did they include those paragraphs at all? It concerns mostly chapters devoted to MySQL. But as for PHP, everything's more than OK. General conclusion - "Above average". But so far not that perfect as I expected.