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 1. login.php


  `<?php
session_start();
include "koneksi.php";
error_reporting(0);
if (empty($_SESSION['username']) AND empty($_SESSION['password'])){include "index.php";}
else{?><?php
$sql = mysql_query("SELECT * FROM tb_user WHERE user_id = '$_SESSION[user_id]'");
while ($data = mysql_fetch_array($sql))
{
 $username= $data['user_username'];}?>
<?php
if ($_SESSION[level] == "1")
if ($_SESSION[level] == "2"){echo "You're logged as admin! <a href='logout.php' title='Keluar!'>Keluar</a>";}
if ($_SESSION[level] == "3"){echo "You're logged as user! <a href='logout.php' title='Keluar!'>Keluar</a>";}
if ($_SESSION[level] == ""){echo "Kamu tidak memiliki akses kesini!";}
?><?php } ?>`


 2. check.php    `<?php
session_start();//mulai session
mysql_connect("localhost", "root", "");
mysql_select_db("kepegawaian");
$username = $_POST['username'];
$password = md5($_POST['password']);
//untuk mencegah sql injection
//kita gunakan mysql_real_escape_string
$username= mysql_real_escape_string($username);
$password= mysql_real_escape_string ($password);
$user = mysql_query("select * from tb_user where username='$username' and password='$password'");
$tot= mysql_num_rows($user);
$r= mysql_fetch_array($user);
if ($tot > 0) {
 $_SESSION['username'] = $username;
 $_SESSION['password'] = $password;
 $_SESSION['level'] = $r['level'];
 if($r['level']=='1'){
echo"<script>location.href='datapegawai.php'</script>";
 }elseif($r['level']=='2'){
echo"<script>location.href='owner.php'</script>";
 }elseif($r['level']=='3'){
echo"<script>location.href='home.php'</script>";}
} else { echo"<script>location.href='index.php'</script>";}?>`


 3. logout.php


`<?php
session_start();
unset($_SESSION['user']);
session_destroy();echo"<meta http-equiv='refresh'content='0; url=login.php'>";
?>`

 4. datapegawai.php


 `<?php
$page = 'Data Pegawai';
if(isset($_SESSION['user']))
{    header("Location: index.php");
    exit;
}?>
<!DOCTYPE html>
<html lang= "en">
	<head>
		<meta charset = "utf-8">
		<title>Sistem Informasi Kepegawaian</title>
		<link rel = "stylesheet" href = "css/style.css">
	</head>
	<body><div id = "header">
			<div id = "name">
			</div>
				<div id = "gambar">
				  <img src="images/pg.png" width="836px" height="457px" alt="pegawai">
			</div>
		</div>
		<div id = "flt">
		<div id="menu">
			<ul>
				<?php include 'menu.php';?>
				</ul></div></div>
		<div id = "main">
		<div id="content">
			<h1>Petunjuk Penggunaan</h1>
			<button type="submit" class="button">Pelajari Selengkapnya</button>
		</div>
	</div><div id = "footer">
		<div id="copyright">
		</div>
	</div>
	</body>
</html>`