foreach (array('Y' => 'Year',  'm' => 'Month', 'd' => 'Day') as $_elementKey => $_elementName) {
                $_variableName = '_' . strtolower($_elementName);
                $$_variableName = isset($params['time'][$prefix . $_elementName])
                    ? $params['time'][$prefix . $_elementName]
                    : date($_elementKey);