How can i display PHP version, Zend Server Version and apache version?

I would like to print PHP, Apache and Zend server version by running a PHP script. What all commands or functions are there to display these result? Am not looking for phpinfo();

How can I print specific values in phpinfo like php version ? Am using Zend framework and Zend server.

I would like to display the version of Zend server and Zend framework. How can I do it?

http://php.net/manual/en/function.phpversion.php

http://www.php.net/manual/en/function.zend-version.php

http://php.net/manual/en/function.apache-get-version.php