<form id="formcar" name="formcar" method="post" action="car.php">
                <input type='hidden' name='id[]' value='22' />
                <input type='hidden' name='id[]' value='23' />
                <input type='hidden' name='id[]' value='24' />
                <input type='hidden' name='id[]' value='25' />
                <button type="submit" name="button" class="btn-2">购买</button>
                </form>

    $buynum = isset($buynum) && is_numeric($buynum) ? $buynum : 1;
    $id =empty($id)? "" : intval($id);
    $buynum = ($buynum < 1) ? 1 : $buynum;
    $rs = $dsql->GetOne("SELECT id,channel,title FROM #@__archives WHERE id='$id'");
    if(!is_array($rs))
    {
        ShowMsg("该商品已不存在！","-1");
        exit();
    }
    $cts = GetChannelTable($rs['channel']);
    $rows = $dsql->GetOne("SELECT aid as id,trueprice as price,units FROM `$cts[addtable]` WHERE aid='$id'");
    if(!is_array($rows))
    {
        ShowMsg("该商品已不存在！","-1");
        exit();
    }
    $rows['buynum'] = $buynum;
    $rows['title']     = $rs['title'];
    $cart->addItem($id, $rows);
    ShowMsg("已添加加到购物车,<a href='car.php'>查看购物车</a>","car.php");
    exit();