AJAX调用SQL查询

Question

我使用以下手风琴显示两个结果不同的查询：手风琴显示查询中的一行，而我使用AJAX调用第二个查询来填充手风琴内容区域。这是我的代码和问题：

我收到以下错误：

错误：[object XMLHttpRequest]

这是我的代码：

手风琴

<div class="wrapper" >
   <div class="accButton" id="<?php echo $name;  ?>"> //this value comes from the query and is passed to the AJAX call
   <span class="namecustcoltype"><?php echo $record;  ?></span>
   <span class="namecusttype"><?php echo $name;  ?></span>
       //Accordian content area- This div accepts the return from the AJAC call
       <div class="accContent" id="output_element">   
       </div>
</div> //closing div for accordian button

AJAX致电

    <script type="text/javascript">
$(document).ready(function() {
$('.accButton').click(function() {
var element = $(this);
var del_id2 = element.attr("id");
 $.ajax({
   type: "POST",
   url: "item_view.php",
   //data: info,
   data: {id2:del_id2},
   success: function(response){
      $("#output_element").html(response);
   },
              error: function(msg){
                alert("Error: "+msg);
            }

});
});
});
</script>

item_view.php

<?php

include('db.php');
$id = $_POST['id2'] ;
$name = $_POST['order_id'] ;
$sql = "SELECT * FROM mgap_orders WHERE mgap_ska_id = '$id' GROUP BY mgap_item_description LIMIT 5";
$stmt = $pdo->prepare($sql); 
$items = array();
$stmt->execute(array(':id' => '$id'));

    while($row_cat_sub = $stmt->fetch(PDO::FETCH_ASSOC))
    {
    $items['item']=$row_cat_sub['mgap_item_description'];
    $items['item_num']=$row_cat_sub['mgap_item_number'];
    $items['item_type']=$row_cat_sub['mgap_item_type'];
    $items['item_cat']=$row_cat_sub['mgap_item_catalog_number'];
    $items['item_ven']=$row_cat_sub['mgap_item_vendor'];
    $items['item_pur']=$row_cat_sub['mgap_item_percent_purchased'];
    $items['item_sales']=$row_cat_sub['mgap_item_sales'];
    }

    foreach($items as $item) {
    ?>          
      <span class="namecustcoltype"><?php echo $item;  ?></span>
      <span class="namecusttype"><?php echo $item_num;  ?></span>
      <span class="growthcust">$<?php echo $item_type;  ?></span>
      <span class="namecustcoltype"><?php echo $item_cat;  ?></span>
      <span class="namecusttype"><?php echo $item_ven;  ?></span>
      <span class="growthcust">$<?php echo $item_pur;  ?></span>
      <span class="growthcust">$<?php echo $item_sales;  ?></span>                
    <?php
}
            ?>