dedecms的dede:list标签支持weight权重排序的方法

//排序方式
$ordersql = ;
if($orderby=="senddate" || $orderby=="id") {
 $ordersql=" ORDER BY arcid $orderWay";
}
else if($orderby=="hot" || $orderby=="click") {
 $ordersql = " ORDER BY arcclick $orderWay";
}
else if($orderby=="lastpost") {
 $ordersql = "  ORDER BY arclastpost $orderWay";
}
 else if($orderby=="weight") {
 $ordersql = "  ORDER BY arcweight $orderWay";
}
else {
  $ordersql=" ORDER BY arcsortrank $orderWay";
}

//如果不用默认的sortrank或id排序使用联合查询（数据量大时非常缓慢）
if(preg_match(/hot|click|lastpost|weight/ $orderby))

{dede:list orderby=weight orderway=asc}