"It's the latest move by Zend to ramp up PHP's profile in the enterprise. In 2005, the company started a multiyear effort to add new tools and technologies to the PHP ecosystem as part of Gutmans' vision of expanding PHP adoption.
"Two technologies that have already emerged from that effort are the Zend Framework, which provides an application deployment framework for PHP, and the PDT (PHP Development Tools) IDE project at Eclipse. The new Zend Server effort includes Zend Framework and can benefit from PHP applications built using PDT."