{$_COOKIE['LogIn']}\n");
fclose($fh);
die("Success - check your other computer.");
}
if ($_GET['check']) {
if (file_exists($db)) $sessions=file($db); else die();
foreach ($sessions as $k => $value) {
$d=explode(">",$value);
if ($d[0]==$_GET['check']) {
setcookie('LogIn',$d[1],time()+24*60*60);
//Delete the disposable key
unset($sessions[$k]);
$fh=fopen($db,"w");
foreach($sessions as $value)
fwrite($fh,$value);
fclose($fh);
die("Success");
}
}
die();
}
switch ($_GET['action']) {
case "login":
if ($_POST['username']) {
setcookie('LogIn',htmlentities($_POST['username']),time()+24*60*60);
die("");
} else echo "";
break;
case "qrlogin":
$key=md5(time()); //Don't care about security for the sake of this proof-of-concept
echo "";
google_qr($_SERVER['SCRIPT_URI']."?ns=".$key,200);
?>
window.location='?action='");
default:
if ($_COOKIE['LogIn'])
echo"You are logged in as {$_COOKIE['LogIn']}.
Note the log-in cookie expires after a day - on your average social networking site, people usually tick 'keep me logged in'.
Log out";
else
echo "You are not logged in.
Log in via user name
Log in via QR code";
}
function google_qr($url,$size ='150',$EC_level='L',$margin='0'){
$url = urlencode($url);
echo '
';
}
?>