-$cookie_name = sprintf ("%sauth", DBPREFIX);
-setcookie ($cookie_name, "", time () - 3600, "" , "",false, true);
+setcookie (sprintf ("%sauth", DBPREFIX), "", time () - 3600, "" , "",false, true);
+setcookie (sprintf ("%suser", DBPREFIX), "", time () - 3600, "" , "",false, true);