Cross site request forgery (CSRF) Protection in PHP - 2

<?php
  session_start();

  if (isset($_POST['uname'], $_POST['token'])) {
    if (!empty($_POST['uname']) && !empty($_POST['token'])) {
      if (!Security::checkToken($_POST['uname'])) {
        // Show the error or redirect on home page!
        header('Location: index.php');
        die();
      }

      // Succeed!
      print_r($_POST);
    }
  }
?>
<html>
  <head>
    <title>CSRF - TheCodePress</title>
  </head>
  <body>
    <form action="index.php" method="POST">
      <label>Email:</label><br />
      <input type="text" name="uname" placeholder="Username" />
      <input type="hidden" name="token" value="<?php echo Security::getToken(); ?>" />
    </form>
</body>
</html>