php de şifreli tek sayfa?

<?
ob_start();
session_start();

$name="kullanıcıadıbelirle";
$pass="şifrebelirle";

$gelen_name=$_POST["adminname"];
$gelen_pass=$_POST["adminpassword"];

if($name==$gelen_name)if($pass==$gelen_pass)
{
$_SESSION["admin"]="OK";
header("location: index.php");
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-9" />
<title>Untitled Document</title>
<style type="text/css">
<!--
body {
background-color: #0099FF;
}
-->
</style></head>

<body>
<form name="accessadminfrm" method="POST">
<table width="287" border="0" align="center">
<tr>
<td width="128">Yönetici Adı </td>
<td width="143"><input type="text" name="adminname" /></td>
</tr>
<tr>
<td>Yönetici Şifresi </td>
<td><input type="text" name="adminpassword" /></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" name="Submit" value="Access to Administrator Panel" /></td>
</tr>
</table>
</form>
</body>
</html>

Genişletmek için tıkla ...

<?
ob_start();
session_start();
if($_SESSION["admin"]<>"OK")$admin="NOT";

if($admin=="NOT")header("location: admin-giris.php");
?>

Genişletmek için tıkla ...