While creating the admin section for this blog, I needed the script to redirect if the user was not logged in, however I did not realise that by default $this->redirect(); does not include an exit(); I came across an addition to the redirect function to call an exit() with it. Rather than using

<?php
$this->redirect('controller/action');
exit();
?>

You can simply use:

<?php
$this->redirect('controller/action', null, true);
?>