数据表参考:

代码:--------------------------------------------------------------------------------
create table `mf_sort` (
`sortid` smallint( 3 ) unsigned not null auto_increment ,
`main` tinyint( 2 ) unsigned not null ,
`parentid` smallint( 3 ) unsigned not null ,
`layer` smallint( 3 ) unsigned not null ,
`orders` tinyint( 2 ) unsigned not null ,
`sort` varchar( 100 ) not null ,
primary key ( `sortid` ) ,
index ( `main` , `parentid` , `layer` , `orders` )
);
--------------------------------------------------------------------------------


关键的函数

php代码:--------------------------------------------------------------------------------
function get_main_layer_orders($parentid)
{
global $x_db;
$sql = "select `main`, `layer`, `orders` ";
$sql .= "from `mf_sort` ";
$sql .= "where `postid`='$parentid'";
$x_db->exec($sql);
$data = $x_db->get_data();
$layer = $data[0]['layer']+1;
$main = $data[0]['main'];
$orders = $data[0]['orders'];

$sql = "select `sortid` from `mf_sort` ";
$sql .= "where `parentid`='$parentid'";
$x_db->exec($sql);
$n = $x_db->n;
if ($n>0)
{
$lastid = $parentid;
get_lastid($lastid);
$sql = "select `orders` from `mf_sort` ";

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