Stuff

<?
include('./SSI.php');

// get referring page and session
$referrer = getenv("HTTP_REFERER");
$page= $_SESSION['page'];
$username= $_POST['user'];

// signup but not submitted form
if ($referrer == "http://www.ayrshirelangaming.com/signup/" and $page == "signup" and empty($username) ) {
        echo "this page belongs to signup [not submitted]";
        include ('forum.php');
}

// signup but submitted form
elseif ($referrer == "http://www.ayrshirelangaming.com/signup/" and $page == "signup" and !empty($username) ) {
        echo "this page belongs to signup [submitted]";
        include ('forum.php');
}

// forum but submitted form
elseif ($referrer == "http://forum.ayrshirelangaming.com/" and !empty($username) ){
        echo "this page belongs to forum [submitted]";
        include ('forum.php');

}

// forum but non-submitted form
elseif ($referrer == "" and empty($username) ) {
        echo "this page belongs to the forum [not submitted]";
        include ('forum.php');
}

// testing
echo "$referrer <br>";
echo "$page <br>" ;
echo "$username <br>";
?>