Most of this book (98 pages out of 132) simply lists 1404 of the 2750 functions that ship with PHP 4.3. It gives the version where each was introduced together with a one-sentence summary. I think the author would have been better advised to go for broke an even with the higher page count have covered all 2750 functions.

Because PHP is something that consultants sometimes have to fix on site this book could be useful, but could have been more so, even in this format.