Time servers not only offer the time itself, but also additional information. You can
get this information with the getInfo() method.
<?php
$server = new Zend_TimeSync(array('generic' => 'ntp:\\0.pool.ntp.org',
'fallback' => 'ntp:\\1.pool.ntp.org'));
print_r ($server->getInfo());
The returned information differs with the protocol used and can also differ with the server used.