<?php class Airtime_View_Helper_TrialRemaining extends Zend_View_Helper_Abstract { public function trialRemaining() { $ending_date = Application_Model_Preference::GetTrialEndingDate(); if ($ending_date == '') { return ''; } $datetime1 = new DateTime(); $datetime2 = new DateTime($ending_date); $interval = $datetime1->diff($datetime2); if($interval->format('%R') == '-'){ return "Trial expired."; } return $interval->format('%a'); } }