，取值输出有关问题

$idss = '3,2,7,5';
$re = $db->findall('select id,title from aaa where id in('.$idss.')');
foreach($re as $list){
   echo $list['id'].',';
}

$re = $db->findall("select id,title from aaa where id in($idss) order by fiind_in_set(id, '$idsd')");

$re = $db->findall("select id,title from table where find_in_set(id, ".$idss.")");