删除无限分类并同时删除它下面的所有子分类的方法

$act = isset ($_get['act']) ? trim ($_get['act']) : ";
if ($act == 'del')
{
$sort_id = isset ($_get['id']) ? intval($_get['id']) : '0' ;
$sort_ids = $sort_id;
$childrenids = getchildrenids ($sort_id);
if (!empty ($childrenids))
{
$sort_ids .= $childrenids;
}
$sql = “delete from `article_sort` where `sort_id` in ({$sort_ids})";
$res = mysql_query ($sql);
if ($res)
{
alert ('删除成功');
exit;
}
else
{
alert ('删除失败');
exit;
}
}

getchildrenids 这个函数以前已经给出来过，不清楚的请参考 自定义函数之获取无限分类id下的子类id集

自定义函数之获取无限分类id下的子类id集

/*—————————————————— */
//– 获取无限分类id下面的子类id集
//– $sort_id = $sort_id.getchildrenids($sort_id);
//– $sql = " ….. where sort_id in ($sort_id)";
/*—————————————————— */
function getchildrenids ($sort_id)
{
global $db;
$ids = ";
$sql = "select * from ".$db->table('article_sort')." where `parent_id` = '{$sort_id}'";
$res = $db->query ($sql);
if ($res)
{
while ($row = $db->fetch_assoc ($res))
{
$ids .= ','.$row['sort_id'];
$ids .= getchildrenids ($row['sort_id']);
}
}
return $ids;
}