Ensure any code after a redirect is not executed

Author: zachborboa

examples/gmail_send_email.php

@@ -33,6 +33,7 @@
 
     $_SESSION['access_token'] = $curl->response->access_token;
     header('Location: ?');
+    exit;
 } elseif (!empty($_SESSION['access_token'])) {
     // Use the access token to send an email.
     $curl = new Curl();

examples/google_plus_profile.php

@@ -33,6 +33,7 @@
 
     $_SESSION['access_token'] = $curl->response->access_token;
     header('Location: ?');
+    exit;
 } elseif (!empty($_SESSION['access_token']) && !isset($_GET['retry'])) {
     // Use the access token to retrieve the profile.
     $curl = new Curl();