Core PHP Programming - Third Edition - Leon Atkinson - 2003.
Core PHP Programming, Third Edition is the authoritative guide to the new PHP 5 for experienced developers. Top PHP developer Leon Atkinson and PHP 5 contributor/Zend Engine 2 co-creator Zeev Suraski cover every facet of real-world PHP 5 development, from basic syntax to advanced object--oriented development-even design patterns!
It's all here: networking, data structures, regular expressions, math, configuration, graphics, MySQL/PostgreSQL support, XML, algorithms, debugging, optimization...and 650 downloadable code examples, with a Foreword by PHP 5 contributor and Zend Engine 2 co-creator Andi Gutmans!