Once PDT is installed, all its features will be available for a 30 day trial. At the end of the 30 day trial, the professional features will be disabled. These include refactoring, getter and setter generation, Zend Framework integration, profiling, PHPUnit testing, Zend Platform integration, debugging through tunneling, advanced code formatting, code galleries, organizing include statements, PHP/HTML WYSIWYG, and more.
To enjoy the full range of PDT functionality, you should register a valid license.
To register a valid license and activate all Zend Studio for Eclipse features, go to Help | Register and enter your username and license key.
You can purchase a Zend Studio for Eclipse license from the Zend Store at http://www.zend.com/store/software/studio.
Note:
If you are currently under maintenance for Zend Studio 5.5, you can receive a free Zend Studio for Eclipse upgrade license. Go to the Zend Support Center for more information.