+ We are now telling the browser not to cache our landing page

src/landing/index.php

@@ -1,4 +1,8 @@
 <?php
+header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
+header("Cache-Control: post-check=0, pre-check=0", false);
+header("Pragma: no-cache");
+
 require('../classes/vouchermanager.php');
 require('../classes/systemmanager.php');