ช่วยดู code update sql ข้อมูลทีครับ ผมอัพเดทไม่ได้สักทีครับ ผิดพลาดตรงไหนครับ

ข้อมูลในตาราง sql ครับ
id , user , end_time

<?php 

$serverName = "localhost";
$userName = "pro";
$userPassword = "pWUi6SVt";
$dbName = "pro";

$conn = new mysqli($serverName,$userName,$userPassword,$dbName);
$conn->query("set names utf8");


$sql = "SELECT * from member WHERE user = 'admin' ";
$query = $conn->query($sql) or die($conn->error."<br>$sql");
$ro=$query->fetch_assoc();

$name = $ro['name'];
$province = $ro['province'];
$user = $ro['user'];
$lg_now = $ro['lg_now'];
$end_time = $ro['end_time'];
$id = $ro['id'];
$newtime = date("Y-m-d", strtotime('+30 day', strtotime($end_time) ));

//echo $newtime;

?>

<div align="center"> <!-- end center 1--->

<form action="post" name="update" action="update.php">

<table width="100%" border="1" align="center" cellpadding="2" cellspacing="0" bgcolor="" style="border-collapse: collapse" bordercolor="#FFFFFF">

  <tr>
  		<th bgcolor="#ffffff" align="center"><?php echo $name ?></th>
	    <th bgcolor="#ffffff" align="center"><?php echo $province ?></th>
	    <th bgcolor="#ffffff" align="center"><?php echo $user ?></th>
	    <th bgcolor="#ffffff" align="center"><?php echo $lg_now ?></th>
	    <th bgcolor="#ffffff" align="center"><?php echo $end_time ?></th>
	    <th bgcolor="#ffffff" align="center">

<input type="text" name="newtime" value="<?php echo $newtime ?>">
<input type="text" name="user" value="<?php echo $user ?>">
<input type="text" name="id" value="<?php echo $id ?>">
<input name="submit" type="submit" id="submit" value="บันทึก">
		</th>
  </tr>



</table>
</form>
	</div><!-- end center 1--->

<?php
ini_set('display_errors', 1);
	error_reporting(~0);


$serverName = "localhost";
$userName = "pro";
$userPassword = "pWUi6SVt";
$dbName = "pro";

$conn = new mysqli($serverName,$userName,$userPassword,$dbName);
$conn->query("set names utf8");

////////////////////

$sql = "UPDATE member SET


end_time = '".$_POST["newtime"]."' ,
user = '".$_POST["user"]."' 

WHERE id = '".$_POST["id"]."' ";


$query = mysqli_query($conn,$sql) or die(mysqli_error());


   if($query) {
      echo "<BR><center><font size='3'color='#006600'>อัพเดทข้อมูล สำเร็จแล้ว</font></center>" ;
      //*echo "<meta http-equiv='refresh' content='2; url=show.php'>" ;
      echo "<script language='javascript'>setTimeout('history.go(-2);',1500);</script>";
   }

?>