message: Fix the PDO contrast group not support the MySQL 8.
diff: @@ -55,6 +55,7 @@ SQL;
  //PDO
  !extension_loaded('PDO') && exit;
  $_map = $map;
  + try {
  $pdo = new PDO(
  "mysql:host=" . MYSQL_SERVER_HOST . ";dbname=" . MYSQL_SERVER_DB . ";charset=utf8",
  MYSQL_SERVER_USER, MYSQL_SERVER_PWD
  @@ -68,6 +69,9 @@ SQL;
  } while ($ret = $stmt->nextRowset());
  assert($stmt->rowCount() === 1, 'get the affected rows failed!');
  assert(empty($_map), 'there are some results lost!');
  + } catch (\PDOException $e) {
  + assert($e->getCode() === 2054); // not support auth plugin
  + }
  }
  });
  ?>
  