Bagaimana cara mengupdate data dari multiple checkbox?

Kan, saya mau meng-update dari gambar yang dipilih.. misal yang di gambarnya burem itu status=upload, yang gak burem status=Belum, terus kalau aku centang banyak ya berubah gitu aja dari status yg mulanya Belum jd Upload dan sebaliknya..

Tampil gambar :

   <form class="form-horizontal" id="akun" name="example_form" action="?modul=home&aksi=update" method="POST" data-validate="parsley" enctype="multipart/form-data">

   <?php

   $b = mysql_query($tampil="SELECT a.*,b.nama FROM foto a, akun b WHERE a.pemilikfoto = b.id_akun ORDER BY a.tanggal_foto ASC") or die($tampil.'<br>error</br>'.mysql_error());

		  	//$no=1;
		  	while($rb = mysql_fetch_array($b)){

		  		if($rb['status_foto'] == 'Belum'){
echo "
<div class='col-md-3'>
        <input type='checkbox' name='idfoto' value='$rb[id_foto]' />

        <img src='$rb[url]' class='img-thumbnail' alt='Cinque Terre' width='304' height='236'>
     </div>";
}else{
	echo "<div class='col-md-3'>
       <input type='checkbox' name='idfoto' value='$rb[id_foto]' />

        <img src='$rb[url]' class='img-thumbnail' alt='Cinque Terre' width='304' height='236' style='opacity: 0.3;background: black;'>
     </div>
     ";
 }
 }
echo "
</div>
</div>
   <br>
    <center> <button type='submit' class='btn btn-primary btn-md' style='margin-left: 37px;'>UPDATE</button> </center>
</form>";

UPDATE GAMBAR :

 $idfoto = $_POST['idfoto'];

   $b = mysql_query($tampil="SELECT a.*,b.nama FROM foto a, akun b WHERE a.pemilikfoto = b.id_akun and a.id_foto='$idfoto' ORDER BY a.tanggal_foto ASC") or die($tampil.'<br>error</br>'.mysql_error());

		  	//$no=1;
		  $rb = mysql_fetch_array($b);
				if($rb['status_foto'] == 'Belum'){
						 $sqlupdate = "update foto set status_foto='Upload' where id_foto='$idfoto'";
 				$res=mysql_query ($sqlupdate) or die (mysql_error());
 				echo "<script>window.location = 'http://localhost/sacoret/admin/admin.php?modul=home'</script>";

				}else{
						$sqlupdate = "update foto set status_foto='Belum' where id_foto='$idfoto'";
						$res=mysql_query ($sqlupdate) or die (mysql_error());
						echo "<script>window.location = 'http://localhost/sacoret/admin/admin.php?modul=home'</script>";
				}

Ini udah bisa update sih.. tapi gak bisa multiple