GUMP::validate_date PHP Method

    protected function validate_date($field, $input, $param = null)
    {
        if (!isset($input[$field]) || empty($input[$field])) {
            return;
        }
        $cdate1 = date('Y-m-d', strtotime($input[$field]));
        $cdate2 = date('Y-m-d H:i:s', strtotime($input[$field]));
        if ($cdate1 != $input[$field] && $cdate2 != $input[$field]) {
            return array('field' => $field, 'value' => $input[$field], 'rule' => __FUNCTION__, 'param' => $param);
        }
    }