The third edition of the popular "Zend PHP 5 Certification Study Guide," edited and produced by php architect], provides the most comprehensive and thorough preparation tool for developers who wish to take the exam. Zend Certification is an industry-recognized benchmark used to validate PHP expertise while indicating a developer's commitment to mastering the craft and being a professional programmer. This edition adds three new chapters and over 80 pages of new content, and covers new features added in PHP 5.3, 5.4, 5.5, and 5.6, including namespaces, traits, variadics, generators, closures, and callbacks. The book is updated to provide a discussion of modern best practices when dealing with PHP variables and types, arrays, strings, databases, object-oriented programming and patterns, web security, XML, web services, and more. Revised by PHP professional and Zend Certified PHP 5 Engineer Davey Shafik, this edition is sure to be both a useful study guide and a go-to reference for PHP programmers everywhere.