/*
<?php
session_start();
if(isset($_SESSION[‘nama’]))
{
session_destroy();
header(‘Location: index.php’);

}
?>
<html>
<head>
</head>
<body>
<form name=”form1″  method=”POST” action=”login.php”>
<table align=”center”>
<tr>
<td>Nama:</td>
<td><input type=”text” name=”nama” /></td>
</tr>
<tr>
<td>Password:</td>
<td><input type=”password” name=”password” /></td>
</tr>
</table><br>
</form>
</body>
</html>
/* simpan sintak di atas dengan nama index.php

<?
Session_start() ;

$koneksi = mysql_connect(“localhost”,”root”,””);
mysql_select_db(“perpustakaan”,$koneksi);
$query=mysql_query(“select * from user where nama='”.$_POST[‘nama’].”‘ and
password=”.$_POST[‘password’].””,$koneksi);
$hasil=@mysql_num_rows($query);

if($hasil == 0 ){
echo”<SCRIPT LANGUAGE=\”Javascript\”>window.alert(\”password salah\”)</SCRIPT>”;

include(“index.php”);

}else{

// echo”<SCRIPT LANGUAGE=\”Javascript\”>window.alert(\”password benar\”)</SCRIPT>”;
$_SESSION[‘nama’]     = $_POST[‘nama’];
$_SESSION[‘password’] = $_POST[‘password’];
?>
Password benar <?=$_SESSION[‘nama’]     ?>
<form name=”form1″ action=”home.php” method=”POST”>
<input type=”hidden” name=”nama” value=”<?=$_POST[‘nama’]?>” />
<input type=”hidden” name=”password” value=”<?=$_POST[‘password’]?>” />
<input type=”submit” value=”OK” name=”log in”/>
</form>
<?
//include(“home.php?nama=xxx&pass=xxx”);
}
?>
/* simpan sintak di atas dengan nama login.php

<?php
session_start();
session_destroy();
//include(“index.php”);
header(‘Location: index.php’);
?>
/* simpan sintak di atas dengan nama logout.php
*/