My first book was published in May, 1999. A second edition followed in August, 2000. The third edition was published in August 2003. You may wish to download the Core PHP Listings (e.g. Examples, Source Code). You may also wish to review the 3/E Errata page. Errata for previous editions is still available: Core PHP Programming 1/E Errata, Core PHP Programming 2/E Errata.
There were two nice reviews of previous editions.