Question

我有一个带有单选按钮和列表框的表单。我试图在按下按钮时调用一个php文件，以将选定的选项保存到MySQL数据库中。我想传递选定的选项以及total_cost，这是一个JS变量。

当按下表单提交按钮时，如何将JS变量传递给php文件？

   I try to remove whole list with function but its also not working.

    <body>
    <main>
   <h1>Your Favourite Recipes</h1>
<p>These are your favourite recipes that we have saved for you.</p>
  <button id="probam" type="button" 
 name="button" onclick="deleteListe()">brisi</button>
  <p id="fav"></p>

  <script>
   let list = localStorage.getItem('favorites');
   list = list ? list.split(',') : [];
   var ll = [];
   ll = list;

   var output = document.createElement('ul');
   output.setAttribute('id', 'list')


   for (let i = 0; i < ll.length; i++) {
       var it = document.createElement('li');
       var bt = document.createElement('button');
       bt.innerHTML = ('Delete');
       bt.setAttribute('class', 'delete')

       it.appendChild(document.createTextNode(ll[i]));
       it.appendChild(bt);
       output.appendChild(it);
   }

   document.getElementById('fav').appendChild(output);

   var del = document.getElementsByClassName('delete');

   for (let j = 0; j < del.length; j++) {
       del[j].addEventListener('click', function() {
           // console.log((del[j].parentNode).parentNode);
           (del[j].parentNode).parentNode.removeChild(del[j].parentNode);
       })
   }
   function deleteListe() {
  localStorage.removeItem("favorites");
   }
    </script>
  <button type="button" name="button"></button>
  <a  href="index.html" class='vido'>Home</a>
  </main>
  </body>

JS：

<form action="saveConfig.php" class="hide-submit" method="post">

<div class="btn-configure step2button">
<span class="pcButtonText">
Save
</span>                                               
</div>


<ul id="radio" class="input-list">
  <li>
    <input id="item-1" name="config-prod" value="1.00" type="radio" onchange="updateTotal();">
    <label for="item-1">Item 1 [£1.00]</label>
  </li>
  <li>
    <input id="item-2" name="config-prod" value="12.34" type="radio" onchange="updateTotal();">
    <label for="item-2">Item 2 [£12.34]</label>
  </li>
  <li>
    <input id="item-3" name="config-prod" value="9.99" type="radio" onchange="updateTotal();">
    <label for="item-3">Item 3 [£9.99]</label>
  </li>
</ul>

<select id="plist" name="partlist" onchange="updateTotal();">
  <option value="99.99">CPU 1</option>
  <option value="123.00">CPU 2</option>
  <option value="250.54">CPU 3</option>
</select>



</form>
<br>
Total: <input id="total" type="text">

我不知道如何传递变量total_cost。任何建议将不胜感激。

Answer 1

您将必须创建一个input元素，然后将该元素添加到表单中，然后提交表单。

var inputElement=document.createElement("input");
inputElement.setAttribute("value",total_cost);

var form= document.getElementById("formId");
form.appendChild(inputElement);

Answer 2

使用它来保存您的更改，然后在saveConfig.php中使用json_decode（$ _ POST）接收数据

<form action="#" class="hide-submit">
<div class="btn-configure step2button">
<span class="pcButtonText">
Save
</span>                                               
</div>

<ul id="radio" class="input-list">
  <li>
    <input id="item-1" name="config-prod" value="1.00" type="radio" onchange="updateTotal();">
    <label for="item-1">Item 1 [£1.00]</label>
  </li>
  <li>
    <input id="item-2" name="config-prod" value="12.34" type="radio" onchange="updateTotal();">
    <label for="item-2">Item 2 [£12.34]</label>
  </li>
  <li>
    <input id="item-3" name="config-prod" value="9.99" type="radio" onchange="updateTotal();">
    <label for="item-3">Item 3 [£9.99]</label>
  </li>
</ul>

<select id="plist" name="partlist" onchange="save();">
  <option value="99.99">CPU 1</option>
  <option value="123.00">CPU 2</option>
  <option value="250.54">CPU 3</option>
</select>
</form>
<br>
Total: <input id="total" type="text">

<script>
function save(){
    $.ajax({
        url : 'saveConfig.php',
        type: "POST",
        data: $('#form').serialize(),
        dataType: "JSON",
        success: function(data)
        {
            alert('saved');            
        },
        error: function (jqXHR, textStatus, errorThrown){
            alert(errorThrown);
        }
    });
}
</script>

Answer 3

否1：您已关闭总计<input id="total" type="text">标签中的总计</form>。将其保留在</form>标记内。

否2：输入字段<input id="total" type="text">缺少名称属性。它应该像<input id="total" type="text" name="total">

希望这会起作用

保存选项表格并传递JS变量

3 个答案: