note 11365 rejected and deleted from isset by ronabop

I'm trying to dynamically see if a variable from a form is set or not. But it seems like the isset command does not transform the $$ into the form variable before it evaluates it because it is always read as set even though it is not. Any ideas on how to get past this? $qid = db_query("select * from location"); while ($myrow = db_fetch_array($qid)) { $str_region="region".$myrow["locationid"]; if(!empty($$str_region)) { $loc=$myrow["locationid"]; $qid2 = db_query("insert into gbregion values($bookid,$loc)"); } }