Php 带空字段的Paypal购买详细信息页面

我有一个标准的贝宝按钮，如下所示：

单击它会将我重定向到PayPal页面，但说明和价格字段为空。只有数量设置为1且为只读。这个按钮有问题吗

---

提前感谢您的帮助。

我必须将cmd值更改为“\u cart”，并添加隐藏的输入“upload”，值为1

现在它工作得很好

    <!-- Identify your business so that you can collect the payments. -->
    <input type="hidden" name="business" value="info@mywebsite.com">

    <!-- Specify a Buy Now button. -->
    <input type="hidden" name="cmd" value="_xclick">

    <!-- Specify details about the item that buyers will purchase. -->
    <input type="hidden" name="item_name_1" value="My item Name 1">
    <input type="hidden" name="amount_1" value="1000">
    <input type="hidden" name="quantity_1" value="1">

    <input type="hidden" name="item_name_2" value="My item Name 2">
    <input type="hidden" name="amount_2" value="20">
    <input type="hidden" name="quantity_2" value="1">

    <input type="hidden" name="currency_code" value="EUR">

    <input type="hidden" name="notify_url" value="http://www.mywebsite.com/ipn-settings">
    <input type="hidden" name="return" value="http://www.mywebsite.com/DEV/grazie/">

    <input type="hidden" name="custom" value="24">
    <!-- Display the payment button. -->
    <input type="image" src="https://www.paypalobjects.com/it_IT/IT/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal è il metodo rapido e sicuro per pagare e farsi pagare online.">
    <img alt="" border="0" src="https://www.paypalobjects.com/it_IT/i/scr/pixel.gif" width="1" height="1">

</form>