织梦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";
            }
        }