Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Zend Certified Engineer (ZCE) certification is an internationally-recognized PHP certification established by Zend Technologies. An exam must be passed in order to be awarded the certification. It is intended to prove that a person is fully qualified to develop PHP web applications. To help Zend Certified Engineers gain exposure to potential employers, Zend lists all Zend Certified Engineers in its directory, Yellow Pages for PHP Professionals and allows ZCEs to join its exclusive LinkedIn group. They also allow Zend Certified Engineers to place a ZCE logo on their personal web site and resume.