Tasks::checkEngineVersion

protected Tasks::checkEngineVersion()

protected function checkEngineVersion() {
  parent::checkEngineVersion();

  // Ensure that the MySQL driver supports utf8mb4 encoding.
  $version = Database::getConnection()->clientVersion();
  if (FALSE !== strpos($version, 'mysqlnd')) {
    // The mysqlnd driver supports utf8mb4 starting at version 5.0.9.
    $version = preg_replace('/^\D+([\d.]+).*/', '$1', $version);
    if (version_compare($version, self::MYSQLND_MINIMUM_VERSION, '<')) {
      $this->fail(t("The MySQLnd driver version %version is less than the minimum required version. Upgrade to MySQLnd version %mysqlnd_minimum_version or up, or alternatively switch mysql drivers to libmysqlclient version %libmysqlclient_minimum_version or up.", array('%version' => $version, '%mysqlnd_minimum_version' => self::MYSQLND_MINIMUM_VERSION, '%libmysqlclient_minimum_version' => self::LIBMYSQLCLIENT_MINIMUM_VERSION)));
    }
  }
  else {
    // The libmysqlclient driver supports utf8mb4 starting at version 5.5.3.
    if (version_compare($version, self::LIBMYSQLCLIENT_MINIMUM_VERSION, '<')) {
      $this->fail(t("The libmysqlclient driver version %version is less than the minimum required version. Upgrade to libmysqlclient version %libmysqlclient_minimum_version or up, or alternatively switch mysql drivers to MySQLnd version %mysqlnd_minimum_version or up.", array('%version' => $version, '%libmysqlclient_minimum_version' => self::LIBMYSQLCLIENT_MINIMUM_VERSION, '%mysqlnd_minimum_version' => self::MYSQLND_MINIMUM_VERSION)));
    }
  }
}