Untitled

<?PHP
session_start();
if($_GET['l']){
    session_destroy();
    echo "<meta http-equiv='Refresh' content='0;index.php'>";
}
?>
<HTML>
<HEAD>
<script type="text/javascript" src="qrcode.js"></script>
<script type="text/javascript" src="sample.js"></script>
<LINK REL="stylesheet" HREF="style.css" TYPE="text/css">
</HEAD>
<BODY>
<div id='menubar'>
    <div id='menu'>
    <a href='index.php'>Rings</a>
    </div>
    <div id='login'>
    <?PHP   if(!isset($_SESSION['user'])){  ?>
        <FORM method='POST' action='login.php'>
            Username: <input type='text' name='name'>
            Password: <input type='password' name='pass'>
                      <input type='submit' name='submit' value='Log in'>
        </FORM>
    <?PHP   }else{echo"Logged in as {$_SESSION['user']}.<BR><a href='index.php?l=o'>Log out</a><BR>";}

    if($_SESSION['cart']){
        $s = count(explode('-',$_SESSION['cart'])) > 1 ? 's' : '';
        echo "You have <a href='index.php?cat=cart'>". count(explode('-',$_SESSION['cart'])) . " item".$s." in your cart</a>";
    }else{
        echo "Your cart is currently empty";
    }


    ?>

    </div>
</div>

<div id='content'>
<?PHP
$cat = (isset($_GET['cat'])) ? $_GET['cat'] : 'home';
include($cat.".php");
?>
</div>

</BODY>
</HTML>