You could even get even more fancy and take:
$query = ("SELECT COUNT(*) AS NumberInCart FROM cart WHERE
(userid = '$userid') AND (imageid = '$imageid')");


and turn it into:

 $query = ("
     SELECT 
            CASE 
                 WHEN
                  (
                        COUNT(userid)
                  ) > 0 
                 THEN 1
                 ELSE 0
            END
    FROM cart 
    WHERE
    (userid = '$userid') AND (imageid = '$imageid')");

That way you only ever get a 1 back if it's there, and a 0 back if it's not.
(pretty sure my SQL is good there)

Mark

-----------------------------------
mark@safefrombees.com       
ICQ: 3094740
Safe From Bees
[www.safefrombees.com]