Opening a new database connection in Doctrine is very easy. If you wish to use PDO (www.php.net/PDO) you can just initalize a new PDO object:<code type="php">$dsn = 'mysql:dbname=testdb;host=127.0.0.1';$user = 'dbuser';$password = 'dbpass';try { $dbh = new PDO($dsn, $user, $password);} catch (PDOException $e) { echo 'Connection failed: ' . $e->getMessage();}</code>