ecshop商品属性相关属性商品由新到旧排序

/* 查找符合条件的商品 */
$sql = 'SELECT g.goods_id, g.goods_name, g.goods_thumb, g.goods_img, g.shop_price AS org_price, ' .
"IFNULL(mp.user_price, g.shop_price * '$_SESSION[discount]') AS shop_price, ".
'g.market_price, g.promote_price, g.promote_start_date, g.promote_end_date ' .
'FROM ' . $GLOBALS['ecs']->table('goods') . ' AS g ' .
'LEFT JOIN ' . $GLOBALS['ecs']->table('goods_attr') . ' as a ON g.goods_id = a.goods_id ' .
"LEFT JOIN " . $GLOBALS['ecs']->table('member_price') . " AS mp ".
"ON mp.goods_id = g.goods_id AND mp.user_rank = '$_SESSION[user_rank]' ".
"WHERE a.attr_id = '$key' AND g.is_on_sale=1 AND a.attr_value = '$val[value]' AND g.goods_id <> '$_REQUEST[id]' " .
​​​​​​​'LIMIT ' . $GLOBALS['_CFG']['attr_related_number'];
$res = $GLOBALS['db']->getAll($sql);

/* 查找符合条件的商品 */
$sql = 'SELECT DISTINCT  g.goods_id, g.goods_name, g.goods_thumb, g.goods_img, g.shop_price AS org_price, ' .
"IFNULL(mp.user_price, g.shop_price * '$_SESSION[discount]') AS shop_price, ".
'g.market_price, g.promote_price, g.promote_start_date, g.promote_end_date ' .
'FROM ' . $GLOBALS['ecs']->table('goods') . ' AS g ' .
'LEFT JOIN ' . $GLOBALS['ecs']->table('goods_attr') . ' as a ON g.goods_id = a.goods_id ' .
"LEFT JOIN " . $GLOBALS['ecs']->table('member_price') . " AS mp ".
"ON mp.goods_id = g.goods_id AND mp.user_rank = '$_SESSION[user_rank]' ".
"WHERE a.attr_id = '$key' AND g.is_on_sale=1 AND a.attr_value = '$val[value]' AND g.goods_id <> '$_REQUEST[id]' " .
' ORDER BY  g.goods_id  DESC ' . ' LIMIT ' . $GLOBALS['_CFG']['attr_related_number'];
$res = $GLOBALS['db']->getAll($sql);