Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Why is O'Reilly still offering this?

I just bought this and I guess I should have been more diligent at looking at the description. Seeing 2nd edition I was thinking this covered PHP 5, but it was last released in 2002 and it now covers PHP 4. Book is somewhat useful I guess but why are they still asking $10 for such an out dated book, especially a tech book whose active shelf lives rarely last more than three or four years.Publisher really needs to get this updated to at least cover PHP 5. Of course by the time they release it PHP 6 will probably be the norm.