DedeCMS实现搜索结果按点击量排序的方法

$ordersql = '';        if($this->ChannelType< 0 ||$this->ChannelTypeid< 0){            if($orderby=="id"){                $ordersql="order by arc.aid desc";            }else if($orderby=="senddate"){                $ordersql="order by arc.senddate desc";            }else{                $ordersql=" order by arc.click desc";            }        }else{            if($orderby=="senddate")            {                $ordersql=" order by arc.senddate desc";            }            else if($orderby=="pubdate")            {                $ordersql=" order by arc.pubdate desc";            }            else if($orderby=="id")            {                $ordersql="  order by arc.id desc";            }            else            {                $ordersql=" order by arc.click desc";            }        }