编辑SQL提交PHP和更新数据

Question

好的，现在问题就出现了，编辑页面没有预先填充已经填写的字段，更新按钮也没有实际更新数据库。这是编辑页面的代码。

$query = "SELECT orderNumber, customerName, salesRep, DatePicker, shipMethod, trackingNumber, StatusCheck, Price FROM Orders WHERE id = '$id'";
$result = @mysqli_query($query);

mysqli_fetch_object($result);
?>
<form name="update order" method="post" action="edit.php?a=edit&id=<? echo($ID) ?>&update=1">
  <table width="50%" border="0" cellspacing="0" cellpadding="0">
    <tr> 
      <td width="50%">Order Number</td>
      <td><input name="orderNumber" type="text" id="orderNumber" value="<? echo($row->orderNumber) ?>"></td>
    </tr>
    <tr> 
      <td>Customer Name</td>
      <td><input name="customerName" type="text" id="customerName" value="<? echo($row->customerName) ?>"></td>
    </tr>
    <tr> 
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr> 
      <td>Sales Rep</td>
      <td><input name="salesRep" type="text" id="salesRep" value="<? echo($row->salesRep) ?>"></td>
         <tr> 
      <td>Must Ship By</td>
      <td><input name="DatePicker" type="text" id="DatePicker" value="<? echo($row->DatePicker) ?>"></td>
         <tr> 
      <td>Shipping Method</td>
      <td><input name="shipMethod" type="text" id="shipMethod" value="<? echo($row->shipMethod) ?>"></td>
         <tr> 
      <td>Tracking Number</td>
      <td><input name="trackingNumber" type="text" id="trackingNumber" value="<? echo($row->trackingNumber) ?>"></td>
    </tr>
    <tr> 
      <td>Status</td>
      <td><input name="StatusCheck" type="radio" name="status" value="PROCESSING"> PROCESSING<br><input name="StatusCheck" type="radio" name="status" value="PROCESSING"> PICKED<br><input name="StatusCheck" type="radio" name="status" value="PROCESSING" value="<? echo($row->StatusCheck) ?>"> SHIPPED<br>  value="<? echo($row->StatusCheck) ?>"></td>
    </tr>
    <tr> 
      <td colspan="2"><div align="center">
          <input name="hiddenField" type="hidden" value="update">
          <input name="add" type="submit" id="add" value="Update">
        </div></td>
    </tr>
  </table>
  </form>
<?php

?>

提前谢谢大家！

哎呀，忘记了更新部分

}else{
$query = "UPDATE Orders SET orderNumber= '$orderNumber, customerName= '$customerName', DatePicker= '$DatePicker', shipMethod= '$shipMethod', trackingNumber= '$trackingNumber', Status= '$status' timestamp = NOW() WHERE id = '$id';
$result = @mysql_query($query);
if(!$result){
   echo('Error updating item: ' . $mysql_error());
   exit();
}else{
   mysql_close($link);
   echo('Update successful!');
 }