Contao\Database::__construct PHP Метод

    protected function __construct(array $arrConfig)
    {
        // Deprecated since Contao 4.0, to be removed in Contao 5.0
        if (!empty($arrConfig)) {
            @trigger_error('Passing a custom configuration to Database::__construct() has been deprecated and will no longer work in Contao 5.0.', E_USER_DEPRECATED);
            $arrParams = array('driver' => \System::getContainer()->getParameter('database_driver'), 'host' => $arrConfig['dbHost'], 'port' => $arrConfig['dbPort'], 'user' => $arrConfig['dbUser'], 'password' => $arrConfig['dbPass'], 'dbname' => $arrConfig['dbDatabase']);
            $this->resConnection = DriverManager::getConnection($arrParams);
        } else {
            $this->resConnection = \System::getContainer()->get('database_connection');
        }
        if (!is_object($this->resConnection)) {
            throw new \Exception(sprintf('Could not connect to database (%s)', $this->error));
        }
    }