dedecms分类信息列表页读取会员等级值

function COMMemberInfos($fields,$mid){  
   global $dsql;  
   if($mid <= 0){  
      $revalue =  "Error";  
 }  
  else{  
        $row=$dsql->GetOne("select * from dede_member where mid = ‘{$mid}’");  
       if(!is_array($row)){  
         $revalue = "Not user";  
      }  
      else{  
            $revalue = $row[$fields];  
       }  
    }  
    return $revalue;  
 }