php An active access token must be used to query - php

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>