[nico_swd]

Something like this?

PHP Code:

define('THIS_SCRIPT', 'something');
define('LOCATION_BYPASS', 1);

include('./global.php');

$datecut = TIMENOW - $vbulletin->options['cookietimeout'];

$allusers = $db->query("
    SELECT COUNT(*) AS total
    FROM " . TABLE_PREFIX . "session
    WHERE lastactivity > ". $datecut
);

$users = $db->fetch_array($allusers);

echo $users['total'];