如何使用ListBox通过GET方法发送多个变量

Question

我想创建一个ListBox，可以通过GET方法向Shopping.php发送2个变量（称为类别和顺序），只需单击ListBox。

因此shopping.php可以使用变量$_GET['category']和$_GET['order']

我该怎么做？

<form method="GET">
<select name="XXX" onchange="javascript: submit()">
  <option value="" selected="">Please select here</option>
  <option value="shopping.php?category=Dictionary&order=bookTitle">Order by book title</option>
  <option value="shopping.php?category=Dictionary&order=price">Order by price</option>
</select>
</form>

Answer 1

将您的代码更改为

<form method="GET">
<input type="hidden" name="category" value="Dictionary">
<select name="order" onchange="javascript: submit()">
  <option value="" selected="">Please select here</option>
  <option value="bookTitle">Order by book title</option>
  <option value="price">Order by price</option>
</select>
</form>