DeDecms教程

//获取顶级栏目名 
function GetTopTypename($id)
{
    global $dsql;
    $row = $dsql->GetOne("SELECT typename,topid FROM #@_ _arctype WHERE id= $id");
    if ($row['topid'] == '0')
    {
        return $row['typename'];
    }
    else
    {
        $row1 = $dsql->GetOne("SELECT typename FROM #@_ _arctype WHERE id= $row[topid]");
        return $row1['typename'];
    }
}
//获取顶级栏目id
function GetTopTypeid($id)
{
    global $dsql;
    $row = $dsql->GetOne("SELECT typename,topid FROM #@_ _arctype WHERE id= $id");
    if ($row['topid'] == '0')
        return $id;
    else
    {
        $row1 = $dsql->GetOne("SELECT topid FROM #@_ _arctype WHERE id= $row[topid]"); 
  if ($row1['topid'] == '0')
        return $row[topid];
       $row2 = $dsql->GetOne("SELECT topid FROM #@_ _arctype WHERE id= $row1[topid]");
      if ($row2['topid'] == '0')
        return $row1[topid];
    }
}

调用顶级栏目id：{dede:field name='typeid' function='GetTopTypeid(@me)'/}
调用顶级栏目名称：{dede:field name='typeid' function='GetTopTypename(@me)'/}