Thank for your help today Ray. One other thing, the documentation states that you should verify the 'action'. I did this by editing the if statement like so:
<?php
     $respObj = json_decode($resp );
     if ($respObj->success && $respObj->action == 'homepage') {
         if ($respObj->score < 0.5) {
             header("location: " .$_SERVER["REQUEST_URI"]);
             die();
         }
     } else {
         header("location: " .$_SERVER["REQUEST_URI"]);
         die();
     }
?>
Would this be ok?


