Core_Ftp::parse_dsn

protected static function parse_dsn($dsn)
{
    $ftp = array
    (
        'username'   => false,
        'password'   => false,
        'hostname'   => false,
        'port'       => false,
        'passive'    => false,
        'path'       => false,
    );

    // Get the protocol and arguments
    list ($type, $connection) = explode('://', $dsn, 2);

    if ($connection[0] === '/')
    {
        // Strip leading slash
        $ftp['dir'] = substr($connection, 1);
    }
    else
    {
        $connection = parse_url('http://' . $connection);

        if (isset($connection['user']))
        {
            $ftp['username'] = $connection['user'];
        }

        if (isset($connection['pass']))
        {
            $ftp['password'] = $connection['pass'];
        }

        if (isset($connection['port']))
        {
            $ftp['port'] = $connection['port'];
        }

        if (isset($connection['host']))
        {
            if ($connection['host'] === 'unix(')
            {
                list ($ftp['passive'], $connection['path']) = explode(')', $connection['path'], 2);
            }
            else
            {
                $ftp['hostname'] = $connection['host'];
            }
        }

        if (isset($connection['path']) && $connection['path'])
        {
            $ftp['path'] = substr($connection['path'], 1);
        }
    }

    return $ftp;
}