public function actionAddHalfYear() { $start = null; $interval = null; $end = null; if (!empty($_POST['start_dt'])) { $start = $_POST['start_dt']; } if (!empty($_POST['interval'])) { $interval = $_POST['interval']; } if (!empty($_POST['end_dt'])) { $end = $_POST['end_dt']; } echo UserFunctions::addFalfYear($start, $interval, $end); }