php必须使用活动访问令牌进行查询

Question

I am using facebook SDK to get facebook friends list. If I Invoke API with Javascript FB.init(); it works perfectly fine..

but if I use it directly like

facebook = new Facebook(array(
'appId'  => $appid,
'secret' => $secret
));

$fbuser = $facebook->getUser();
try{
    $user_profile = $facebook->api('/me');
    print_r($user_profile);
} catch(Exception $e){
    echo $e->getMessage();
}

(User is logged in with facebook in the same browser) It always gives me an error : An active access token must be used to query information about the current user.

Please help me how to use it without FB.init() or redirect anywhere..

Answer 1

Use this

facebook = new Facebook(array(
'appId'  => $appid,
'secret' => $secret,
'cookie' => true
));

$fbuser = $facebook->getUser();
if($fbuser){
   $access_token = $facebook->getAccessToken();
   $facebook->setAccessToken($access_token);
   try{
       $user_profile = $facebook->api('/me');
       print_r($user_profile);
   } catch(Exception $e){
      echo $e->getMessage();
   }
}else{
  // User not logged in generate the login button or link here
}

Make sure in the above script when user login ffor the first time it reloads the page in other words you need to provide the redirect_uri https://developers.facebook.com/docs/reference/php/facebook-getLoginUrl/

Also you can use the following api to get the user details

$user_profile =  $facebook->api('/'. $fbuser,'GET');

Then add the following below the page. This will check if the user is already logged in it will re-direct to the same page, in other words it will not ask user to login again

<div id="fb-root"></div>

<script type="text/javascript">
    window.fbAsyncInit = function()
            {
                FB.init
                ({
                    appId   : 'your fb app id',
                    status  : true, // check login status
                    cookie  : true, // enable cookies to allow the server to access the session
                    xfbml   : true, // parse XFBML
                    oauth   : true
                });
                FB.Event.subscribe('auth.login', function()
                {
                    window.location.reload();
                });
            };

          (function()
          {
            var e = document.createElement('script');
            e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
            e.async = true;
            document.getElementById('fb-root').appendChild(e);
            }());
</script>