PHP (Computer program language)

Learning PHP, MySQL & JavaScript: With jQuery, CSS & HTML5

Robin Nixon, Robin Nixon

PHP cookbook

by David Sklar and Adam Trachtenberg.

PHP pocket reference

Rasmus Lerdorf

PHP and MySQL Web Development (5th Edition) (Developer's Library)

Laura Thomson, Luke Welling

Building Online Communities with phpBB 2

Stoyan Stefanov, Jeremy Rogers, Mike Lothar

Dreamweaver MX: PHP web development

Bruno Mairlot, Gareth Downes-Powell, Tim Green, Tim Green

Programming PHP

Rasmus Lerdorf, Kevin Tatroe, Peter MacIntyre

PHP 5 for dummies

by Janet Valade.

Head First PHP & MySQL

Lynn Beighley

Learning PHP and MySQL

Michele E. Davis and Jon A. Phillips.