Elgg\Database::connect PHP Метод

    public function connect($type = "readwrite")
    {
        $conf = $this->config->getConnectionConfig($type);
        $params = ['dbname' => $conf['database'], 'user' => $conf['user'], 'password' => $conf['password'], 'host' => $conf['host'], 'charset' => 'utf8', 'driver' => 'pdo_mysql'];
        try {
            $this->connections[$type] = DriverManager::getConnection($params);
            $this->connections[$type]->setFetchMode(\PDO::FETCH_OBJ);
            // https://github.com/Elgg/Elgg/issues/8121
            $sub_query = "SELECT REPLACE(@@SESSION.sql_mode, 'ONLY_FULL_GROUP_BY', '')";
            $this->connections[$type]->exec("SET SESSION sql_mode=({$sub_query});");
        } catch (\PDOException $e) {
            // @todo just allow PDO exceptions
            // http://dev.mysql.com/doc/refman/5.1/en/error-messages-server.html
            if ($e->getCode() == 1102 || $e->getCode() == 1049) {
                $msg = "Elgg couldn't select the database '{$conf['database']}'. Please check that the database is created and you have access to it.";
            } else {
                $msg = "Elgg couldn't connect to the database using the given credentials. Check the settings file.";
            }
            throw new \DatabaseException($msg);
        }
    }