PHP Notice: Use of undefined constant dbserver - assumed 'dbserver'

$CONFIG[dbserver] =
            'localhost';
$CONFIG[dbuser] = 'test';

$CONFIG[dbpass] =
            'rehrsdfvseg'
$CONFIG[dbname] = 'test';
            

I get this error,
what can I do?

[20-Feb-2014 19:32:20] PHP Notice: Use of undefined constant dbserver - assumed
'dbserver' in /home/knul/public_html/porr/setup/config.php on line
2

[20-Feb-2014 19:32:20] PHP Notice: Use of
undefined constant dbuser - assumed 'dbuser' in
/home/knul/public_html/porr/setup/config.php on line 3

[20-Feb-2014 19:32:20] PHP Notice: Use of undefined constant dbpass
- assumed 'dbpass' in /home/knul/public_html/porr/setup/config.php on line
4

[20-Feb-2014 19:32:20] PHP Notice: Use of
undefined constant dbname - assumed 'dbname' in
/home/knul/public_html/porr/setup/config.php on line
5