public function connect($dsn, $username = NULL, $password = NULL)
	{
		$this->_pdo = new \PDO($dsn, $username, $password);
		$this->_pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
		return $this;
	}
public function connect($dsn, $username = NULL, $password = NULL)
	{
		$this->_pdo = new \PDO($dsn, $username, $password);
		$this->_pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
		return $this;
	}
public function connect ( $ dsn , $ username = NULL , $ password = NULL ) { $ this -> _pdo = new \ PDO ( $ dsn , $ username , $ password ) ; $ this -> _pdo -> setAttribute ( \ PDO :: ATTR_ERRMODE , \ PDO :: ERRMODE_EXCEPTION ) ; return $ this ; }
Connect to a database, using PDO dsn, username and password
@param  string $dsn      PDO dsn string
@param  string $username
@param  string $password
@return Fixture           $this
Connect to a database using PDO dsn username and password