将用户重定向到facebook应用程序中的另一个php页面无法正常工作

Question

I'm new to facebook app developing and I want to redirect users after they click a button in the app. I am using some thing like below:

   <?
   echo '<script> location.href="help.php";</script>';
   ?>

in the help.php on top of the page I have below code and I put exit; to test whether this part is working fine:

      <?php
      ini_set('display_errors', 1);
      error_reporting(E_ALL);
      require_once("./config.php");
      $me = $facebook->api('/me');
      $access_token = $facebook->getAccessToken();
      $user = $facebook->getUser();
      echo "access token:".$access_token;
      echo "<br/> user:".$user;
      exit;
      ?>

the redirect is not working properly!! it is showing blank page once upon a time and the code is not reliable for production. do you have any idea what is wrong here?

UPDATED: this the error i get: Fatal error: Uncaught OAuthException: An active access token must be used to query information about the current user.

Answer 1

Are you sure its the right order for these?

 $me = $facebook->api('/me');
  $access_token = $facebook->getAccessToken();
  $user = $facebook->getUser();

Try this

$access_token = $facebook->getAccessToken();
$user = $facebook->getUser();     
$me = $facebook->api('/me');