具有foreach循环到数据库的jQuery Sortable插件

Question

我已将jQuery可排序插件放入从数据库中拉出的客户的foreach循环中。我现在正在尝试将定位插入到数据库表中。我对jQuery和AJAX的了解非常有限，因此我发现这特别困难。任何建议将不胜感激。

>>> myround(0.5)
1.0
>>> myround(1.5)
2.0
>>> myround(-0.5)
-1.0
>>> myround(-1.5)
-2.0
>>> myround(1)
1.0

使用sql函数保存文件：

$customers_set = select_customers();

while($customer = mysqli_fetch_assoc($customers_set)){
$customers[] = $customer; 

}
 ?>
<script src="//code.jquery.com/jquery-1.12.4.js"></script>
<script src="//code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
 <ul id="sortable">
 <?php 

 foreach($customers as $customer){ 

?>
    <li id="item-<?php echo $customer['id']; ?>"><?php echo $customer['customer_name'] . ' - ' . $customer['position']; ?></li>

 <?php } ?>
 </ul>Query string: <span></span>

  <script>
$(document).ready(function () {
    $('ul').sortable({
        axis: 'y',
        stop: function (event, ui) {
            var data = $(this).sortable('serialize');

            $.ajax({
                    data: oData,
                type: 'POST',
                url: '<?php echo doc_root('/test_save.php'); ?>'
            });
    }
    });
});
  </script>