我没有收到来自 ajax 请求的响应

我没有得到来自 ajax 请求的响应。 我正在发布对处理器.php文件和处理器的 ajax 调用.php 文件正在处理该文件并将处理后的文件发送回 JavaScript 我正在控制台日志中显示我的结果，但它没有显示在 HTML 中。我的JavaScript代码是：

function add_to_cart(item_name,item_price){
  $('.user-info').slideUp('1200');
  $('.cart-status').slideDown('1200');
  var dataString = "item_name=" + item_name + "&item_price=" + item_price + "&page=add_to_cart";
  $.ajax({
    type: "POST",
    url: "php/processor/processor.php",
    data:dataString,
    beforeSend:function(){
      $(".cart-show-product").html('<h3>Your Cart Status</h3><img src="images/loading.gif" align="absmiddle" alt="Loading...." class="center" /><br><p class="center">Please Wait...</p>');
    },
    success: function(response){
      console.log(response);
      $(".cart-show-products").html(response);
    }
  });
}

我的PHP是：

if(isset($_POST['item_name']) && !empty($_POST['item_name']) && isset($_POST['item_price']) && !empty($_POST['item_price']))
{
  $sql = mysqli_query($conn, 
      'SELECT * FROM 
        products_added 
        where 
        username = "'.mysqli_real_escape_string($conn, $_SERVER['REMOTE_ADDR']).'" 
        and 
        item_added="'.mysqli_real_escape_string($conn, $_POST['item_name']).'"'
);
if(mysqli_num_rows($sql) < 1)
{
  mysqli_query($conn, 
        "INSERT INTO products_added values(
          '', 
          '".mysqli_real_escape_string($conn, $_SERVER['REMOTE_ADDR'])."', 
          '".mysqli_real_escape_string($conn, $_POST['item_name'])."', 
          '".mysqli_real_escape_string($conn, $_POST['item_price'])."', 
          '".mysqli_real_escape_string($conn, '1')."', 
          '".mysqli_real_escape_string($conn, $_POST['item_price'])."'
          '".mysqli_real_escape_string($conn, date("d-m-Y"))."')"
  );
?>
<table class="cart-show-products">
  <thead>
    <tr>
      <td>Sl.No</td>
      <td>Item</td>
      <td>Qty</td>
      <td>Price</td>
      <td>Action</td>
    </tr>
  </thead>
<tbody>
<?php
  $sl_no = 1;
  $sql = mysqli_query(
          $conn, 
          'SELECT sum(amount) as grandtotal
                FROM products_added
                WHERE username = "'.mysqli_real_escape_string($conn, $_SERVER['REMOTE_ADDR']).'"
                ORDER BY id'
  );
  $row = mysqli_fetch_array($sql);
  $grandtotal = strip_tags($row['grandtotal']);
  $sql = mysqli_query(
                $conn, 
                'SELECT 
                id,
                item_added,
                price,
                quantity
                FROM products_added
                WHERE username = "'.mysqli_real_escape_string($conn, $_SERVER['REMOTE_ADDR']).'"
                ORDER BY id'
  );
  $row = mysqli_fetch_array($sql);
  $item_id = strip_tags($row['item_id']);
  $item_name = strip_tags($row['item_added']);
  $item_price = strip_tags($row['price']);
  $quantity = strip_tags($row['price']);
  ?>
    <tr class="items_wrap items_wrap<?php echo $item_id; ?>">
      <td><?php echo $sl_no++; ?></td>
      <td><?php echo $item_name ?></td>
      <td><?php echo $quantity ?></td>
      <td><?php echo $item_price ?></td>
      <td><a href="javascript:void(0);" class="remove-from-cart" onclick="remove_this_item('<?php echo $item_id; ?>')"><i class="fa fa-times"></i></a></td>
    </tr>
  </tbody>
</table>
<?php
}