dede根据任意栏目id获取顶级栏目名称的自定义函数

//获取顶级栏目名
function GetTopTypenameById($id)
{
global $dsql;
$row = $dsql->GetOne("SELECT typename,topid FROM dede_arctype WHERE id= $id");
if ($row['topid'] == '0')
{
return $row['typename'];
} else {
$row1 = $dsql->GetOne("SELECT typename FROM dede_arctype WHERE id= $row[topid]");
return $row1['typename'];
}
}