DEDECMS 获取当前栏目及所有子栏目的文章数量

/*
* 返回符合记录的文章数量
* @description DEDE不允许执行子查询，解决栏目下文章统计的问题
* @param $level 为真时查询所有子类目
* */
function getTotalArcByTid($tid, $level=TRUE) {
global $dsql;
$level==TRUE && $tid = GetSonTypeID($tid);
$sql = "SELECT count(id) as total from `dede_archives` where typeid in($tid)";
$result = $dsql->GetOne($sql);
return $result['total'];
}
/*
* 递归获取符合条件的子栏目
* @param $tid 栏目ID
* @return string
* */
function GetSonTypeID($tid)
{
global $dsql;
$dsql->SetQuery("Select id From `dede_arctype` where reid in($tid) And ishidden<>1 order by sortrank");
$dsql->Execute($tid);
$typeid = '';
while($row=$dsql->GetObject($tid))
{
$typeid .= "{$row->id},";
$typeid .= GetSonTypeID($row->id);
}
return trim($typeid,',');
}