salah dimana ya ?

<!--<?php
/*
pertama.. targetnya blum km tentukan ke edit
kedua.. targetnya tetap disini aja
ketiga.. kl udah silakan komen die nya
keempat. perhatikan array yg saya masukkan

kelima.. jgn pake mysql_ pake pdo lebih bagus

if(count($_POST)>1){
die('<pre>'.print_r($_POST,1));
include "koneksi.php";
        foreach($_POST['npm'] as $npm){
                $absen=$_POST['absen'][$npm];
                $tugas1=$_POST['tugas1'][$npm];
                $tugas2=$_POST['tugas2'][$npm];
                $tugas3=$_POST['tugas3'][$npm];
                $nilai_ujian=$_POST['nilai_ujian'][$npm];

                $sql="UPDATE mhsnilai SET absen='$absen',tugas1='$tugas1', tugas2='$tugas2', tugas3='$tugas3', nilai_ujian='$nilai_ujian'";

        }

}else{
//lanjutkan
}
*/
?>
-->
<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>Pengelola Nilai Mahasiswa</title>

<link href="css/tooplate_style.css" rel="stylesheet" type="text/css" />

<script type="text/javascript" src="js/swfobject.js"></script>

<script type="text/javascript">

    var flashvars = {};

    flashvars.xml_file = "photo_list.xml";

    var params = {};

    params.wmode = "transparent";

    var attributes = {};

    attributes.id = "slider";

    swfobject.embedSWF("flash_slider.swf", "flash_grid_slider", "780", "210", "9.0.0", false, flashvars, params, attributes);

</script>

</head>

<body>

<div id="tooplate_wrapper">

        <div id="tooplate_header">

        <div id="tooplate_menu">

            <ul>

                <li><a class="current">Saya Dosen</a></li>

                <li><a href="index.html" class="current">Logout</a></li>

            </ul>

        </div> <!-- end of tooplate_menu -->

    </div> <!-- end of forever header -->

    <div id="tooplate_middle">

        <div id="flash_grid_slider">

            <a rel="nofollow" href="http://www.adobe.com/go/getflashplayer">

                <img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" />

            </a>

        </div>

    </div> <!-- end of middle -->

    <div id="tooplate_content"><span class="content_top"></span>

        <!-- dari sini logika loginnya-->

<div class="cleaner h40"></div>

    <form name="form1" action="" method="post">

    <center>

    <h1>Edit Data Mahasiswa</h1>

    <table border="1" style="border-collapse:collapse" width="100%">

    <tr style="background:orange;">

    <!-- di gunakan untuk membuat label nama fieldnya-->

    <th>NPM</th>

    <th>Nama</th>

    <th>Kelas</th>

    <th>Absen</th>

    <th>Tugas 1</th>

    <th>Tugas 2</th>

    <th>Tugas 3</th>

    <th>Nilai Ujian</th>

    <th>Grade</th>

    </tr>


    <?php

    include "koneksi.php";

    $sql="SELECT * FROM mhsnilai where kelas<='1IA01' order by nama";

    $result=mysqli_query($conn,$sql) or die(mysqli_error());
    $count=mysqli_num_rows($result);

    while ($row=mysqli_fetch_array($result)) {

      extract($row);

      ?>

      <tr>

              <td><?php echo $npm ?><input type=hidden name=npm[] value='<?php echo $npm;?>' /></td> <!--
              <td>
              <? $NPM[]=$npm ?><?php //echo $npm ?>
              </td>-->
              <td><?php echo $nama ?></td>

              <td><?php echo $kelas ?></td>

              <td><center><input name='absen[]' placeholder="absen" size='4' maxlength='4' type=text value= '<?php echo $absen ?>'></center></td>

              <td><center><input name='tugas1[]' placeholder="tugas1" size='4' maxlength='4' type=text value='<?php echo $tugas1 ?>'></center></td>

              <td><center><input name='tugas2[]' placeholder='tugas2' size='4' maxlength='4' type=text value='<?php echo $tugas2 ?>'></center></td>

              <td><center><input name='tugas3[]' placeholder='tugas3' size='4' maxlength='4' type=text value='<?php echo $tugas3 ?>'></center></td>

              <td><center><input name='nilai_ujian[]' placeholder='nilai_ujian' size='5' maxlength='5' type=text value='<?php echo $nilai_ujian?>'></center></td>

              <td><center><?php echo $grade ?></center></td>

              </tr>

              <?php

                        }

                    ?>


                 </table>
   <center><input type="submit" value="Submit" name="submit"></center>
    </form>


<?php

if(isset($_POST['submit'])){

for($i=0;$i<$count;$i++){
$sql1="UPDATE mhsnilai SET absen='$absen[$i]',tugas1='$tugas1[$i]', tugas2='$tugas2[$i]', tugas3='$tugas3[$i]', nilai_ujian='$nilai_ujian[$i]' where npm='$npm[$i]'";
    $result1=mysqli_query($conn,$sql1);
}
if($result1){

    header("location:1ia01.php");
}

}


?>


    <div class="cleaner"></div>

    </div> <!-- end of content -->

    <div id="tooplate_footer">

        Copyright © 2048 <a href="#">Company Name</a>

        <div class="cleaner"></div>

        </div>

</div> <!-- end of wrapper -->

</body>

</html>