//排序方式  $ordersql = '';  if($orderby=="senddate" || $orderby=="id") {   $ordersql=" order by arc.id $orderWay";  }  else if($orderby=="hot" || $orderby=="click") {   $ordersql = " order by arc.click $orderWay";  }  else if($orderby=="lastpost") {   $ordersql = "  order by arc.lastpost $orderWay";  }  else if($orderby=="weight") {   $ordersql = "  order by arc.weight $orderWay";  }  else {   $ordersql=" order by arc.sortrank $orderWay";  }