ajax设置cookie.有效期为1天（cookie名前缀统一为order_sn_，方便之后获取使用）

1.html（tp5遍历表单元素）

<td {if condition="$order['warning'] eq 1" } style="background: red" {/if}>
　　{$order.diff_day}
</td>
<td>
  {if condition="$order['warning'] eq 1"}
      <span order_sn="{$order.order_sn}"class="dis_no default ignoreStock {$order.order_sn}" id="ignoreStock">忽略提示</span>
   {/if}
</td>

2.js

 $(".ignoreStock").on("click", function () {
        var order_sn = $(this).attr("order_sn");
        $(this).parent().prev().css("background", "");  //单元格取消红色背景颜色
        $(this).text('');   //操作去除‘忽略提示’文字
        $.ajax({
            url: "/supplierbuyer/order/ignoreStock",
            data: {
                "order_sn": order_sn,
            },
            type: "POST",
            dataType: "JSON",
            success: function (data) {
                console.log(data);
                if (data.status == true) {
                } else {
                    console.log(data);
                    return false;
                }
            }
        });
    });

3.php

    /**
     * 忽略周期预警
     */
    public function ignoreStock()
    {
        $order_sn = Request::instance()->post('order_sn');
        $name = 'order_sn_' . $order_sn;
        Cookie::set("$name", $order_sn, 86400);

        $res = Cookie::has("$name");
        if ($res) {
            $data['status'] = true;
            $data['msg'] = 'ok';
        } else {
            $data['status'] = false;
            $data['msg'] = '网络错误,请稍后重试~';
        }
        echo json_encode($data);
        exit();
    }