<?session_start();?>
<html>
<head>

</head>
<body>
<h1>Welcome 
<?if(@$_SESSION["username"]!="")//if session exists,greet user
{
echo $_SESSION["username"];
}
else //not logged in, greet guest
{
echo "Guest";
}


?>
</h1>
<?if(@$_SESSION["username"]!="")//if session exists,greet user
{?>
<a href="secret.php">Secret page</a><br><br>
	<a href="logout.php">Log out</a>
<?}
else{?>
Please log in:<br><br>
<form action="checklogin.php" method="post">
Username: <input type="text" name="uname"><br>
Password: <input type="text" name="pword"><br><br>
<input type="submit" value="Log in">
</form>
	
<?}
?>
</body>
</html>