<?
mysql_connect('localhost','root','');
mysql_select_db('db_semester2');
$id = $_POST['id'];
$nis = $_POST['nis'];
$id_buku = $_POST['id_buku'];
$alamat = $_POST['alamat'];
$jumlah = $_POST['jumlah'];
$kelas = $_POST['kelas'];
$sql="UPDATE tb_peminjam SET nis = '$nis', id_buku = '$id_buku', alamat = '$alamat', jumlah = '$jumlah', kelas = '$kelas' WHERE id = '$id' ";
die($sql);
if(mysql_query($sql))
{
  header('location:lihat_data.php');
}else{
  echo mysql_error();
}
?>