项目和总价格没有在篮子php mysql jquery中更新

Question

我正在使用面向对象编程php，我遇到了一些问题。这些项目已正确添加到购物车，但是当单击输入或按更新按钮更新项目以及小计和总值时，它不起作用。 这是我的购物篮页面：

    <?php  
 $session = session::getSession('basket');

$objBasket = new basket();

$out = array();

if(!empty($session)){
$objCatalogue = new catalogue();
foreach($session as $key => $value) {
    $out[$key] = $objCatalogue->getProduct($key);

  }
}
require_once('_header.php');
?>

<div class="container">
<ol class="breadcrumb" style="margin-bottom: 5px;">
<li><a href="index.html">Home</a></li>
<li><a href="category.html">Fiction</a></li>
<li class="active">Shopping Cart</li>
</ol>
</div>
<div class="container"> 
  <?php if (!empty($out)) { ?> 
 <div class="col-md-12" id="big_basket">
   <div class="box">
       <h2>Shopping cart</h2>

         <div class="table-responsive">

            <form action="" method="post" id="frm_basket">
              <table class="table">
               <thead>
                <tr>
                 <th>E-book</th>
                 <th>Quantity</th>
                 <th>Price</th>
                 <th>Remove</th>
                </tr>
               </thead>
               <?php foreach($out as $item){ ?>
               <tbody>
                <tr>
                 <td><?php echo      helper::encodeHTML($item['ebook_title']); ?></td>
                 <td><input type="text" name="qty-<?php echo $item['id']; ?>" value="<?php echo $session[$item['id']]['qty']; ?>"  class="fld_qty" /></td>
                 <td>&pound;<?php echo number_format($objBasket->itemTotal($item['price'], $session[$item['id']]['qty']),2); ?></td>
                 <td><?php echo basket::removeButton($item['id']); ?></td>
                </tr>
               </tbody>
               <?php } ?>
               <?php if($objBasket->_sub_total != 0){ ?>
               <tfoot>
                 <tr>
                 <th colspan="2">Subtotal</th>
                 <th>&pound;<?php echo number_format($objBasket->_sub_total,2);?></th>
                </tr>
                <?php } ?>
                <tr>
                 <th colspan="2">Total Price</th>
                 <th><strong>&pound;<?php echo number_format($objBasket->_total,2);?></strong></th>
                </tr>
               </tfoot>

              </table>
           </form>

        </div>

     <!-- /.table-responsive -->
     </div>

     <div class="box-footer">
       <div class="pull-left">
         <a href="category.php" class="btn btn-default"><i class="fa fa-chevron-left"></i>Continue shopping</a>
       </div>
       <div class="pull-right">
         <button type="submit" class="btn btn-default" class="update_basket"><i class="fa fa-refresh"></i>Update</button>
         <button type="submit" class="btn btn-default"><a href="./?page=checkout">Checkout<i class="fa fa-chevron-right"></i></a></button>
       </div>
     </div>

  </div>
 <?php } else { ?>
  <p>Your shopping cart is currently empty</p>
  <?php } ?>
  </div>

   </div>

</div>



 <?php require_once('_footer.php'); ?>

这是我的jquery应该允许立即提升篮子：

    $(document).ready(function(){


function refreshBasket(){
$.ajax({
  url: 'mod/basket_view.php',
  dataType:'html',
  success: function(data){
    $('#big_basket').html(data);
    initBinds();
  },
  error: function(data){
    alert('Error occurred');
     }
   });
 }



 if($(".add_to_basket").length > 0){
    $(".add_to_basket").click(function() {

        var trigger = $(this);
        var param = trigger.attr("rel");
        var item = param.split("_");

        $.ajax({
              type: 'POST',
              url: 'mod/basket.php',
              dataType: 'json',
              data: ({ id : item[0], job : item[1] }),
              success: function(data){
                  var new_id = item[0] + '_' + data.job;
                  if(data.job != item[1]){
                    if(data.job == 0){
                        trigger.attr("rel", new_id);
                        trigger.text("Remove from basket");
                        trigger.addClass("red");
                    }else{
                        trigger.attr("rel", new_id);
                        trigger.text("Add to basket");
                        trigger.removeClass("red");
                    }
                  }
              },
               error: function(data){
                alert("Error ocurred");
               }
        });
        return false;
    });
  }


  initBinds();

  function initBinds(){
 if ($('.update_basket').length > 0){
     $('.update_basket').bind('click',updateBasket);
 }
 if ($('.fld_qty').length > 0){
     $('.fld_qty').bind('keypress', function(e){
      var code = e.keyCode ? e.keyCode : e.which;
      if (code == 13){
        updateBasket();
      }
     });
 }
 }


  function updateBasket(){
   $('#frm_basket : input').each(function(){
  var sid = $(this).attr('id').split('-');
  var val = $(this).val();
  $.ajax({
      type: 'POST',
      url: 'mod/basket_qty.php',
      data: ({ id: sid[1], qty: val}),
      success: function(){
         refreshBasket();
      },
      error: function(){
        alert('Error occurred');
      }
  });
});
}
});