MySQL Queries

[snareklutz]

How are MySQL queries done in vbulletin?

When I do
$query = "SELECT `ucash` FROM `forum_user` WHERE userid=$wfuserid";
$result = $DB_site->query($query);

I get an error:

Fatal error: Call to a member function on a non-object in /home/webmaste/public_html/services.php on line 47

Please help somebody!

[harmor19]

$query = $db->query_read("SELECT ucash FROM " . TABLE_PREFIX . "forum_user WHERE userid = '$wfuserid' ");
$result = $db->fetch_array($query);

[snareklutz]

Thanks alot!