使用facebook php sdk登录后获取用户的facebook信息

Question

I am using Facebook javascript sdk and php sdk to login user to my web app. With javascript I have the login/out working and I can get a logged in user's public facebook details.

However, when using php, I am not getting the user's facebook details. To give you some info on the app, when I navigate to a certain page that contains a form, the code checks to see if their logged in. If not, they are given a LoginUrl link. Once logged in, I have the $user_id, so now the user can use the form, but I am not getting their facebook details to save in MySQL database when form is submitted. Does anyone have advice to what I should do? I definitely have the $user_id as the form is only shown if I have the $user_id.

I based my code on https://developers.facebook.com/docs/reference/php/facebook-api/

<?php
require 'facebook.php';
//create application instance
$config = array(
'appId' => '**************',
'secret' => '****************************',
'cookie' => true);
$facebook = new Facebook($config);
$user_id = $facebook->getUser(); 
?>

//Page containing form
<div data-role="page" id="postAJourney" data-add-back-btn="true" data-back-btn-text="back" data-rel="back" data-direction="reverse" data-transition="flip" data-theme="b" >
    <div data-role="header"  data-position="fixed">
       <h1>Post A Journey</h1>
    </div>

    <div data-role="content">
       <?php if ($user_id): ?>
       <form action="add_journey.php" method="post" id="postAJourneyForm">
       <?php
       try
       {
           $access_token = $facebook->getAccessToken();
       $param_token = array('access_token' => $access_token); 
       //Proceed knowing you have a logged in user who's authenticated.
       $user_profile = $facebook->api('/me','GET',$param_token);
       echo "Name: " . $user_profile['name'];
       // store session data
       $_SESSION['fb_id'] = $user_profile['id'];
       $_SESSION['fb_name'] = $user_profile['name'];
       $_SESSION['fb_first_name'] = $user_profile['first_name'];
       $_SESSION['fb_last_name'] = $user_profile['last_name'];
       $_SESSION['fbImg'] = "https://graph.facebook.com/".$user_profile['id']."/picture";
    $_SESSION['fbLink'] = "https://www.facebook.com/".$user_profile['name'];
       }
       catch(FacebookApiException $e)
       {
       // If the user is logged out, you can have a 
       // user ID even though the access token is invalid.
       // In this case, we'll get an exception, so we'll
       // just ask the user to login again here.
       $login_url = $facebook->getLoginUrl(); 
       error_log($e->getType());
       error_log($e->getMessage());
       }
       ?>

       //jQuery Mobile Form would be here

 <?php else: ?>
 <?php // No user, print a link for the user to login
$login_url = $facebook->getLoginUrl(array(
'scope' => 'email',
'redirect_uri' => "http://localhost/share/#postAJourney"
));
 ?>
 <div>
     Login using OAuth 2.0 handled by the PHP SDK:
     <a href="<?php echo $login_url; ?>">Login with Facebook</a>
 </div>
 <?php endif ?>

Answer 1

/*In that you need user access token then pass that token in Facebook /me API as parameter then you can get the facebook user logged in information. you need to pass the scope of permission which you want from the user in scope .For retrieving user access token you can use like that */

$loginUrl = $facebook->getLoginUrl(array('scope' => 'manage_pages','redirect_uri'=>'you url'));

/*made oauth url and pass the scope in that to allow user to Facebook oath page for permission Get the access token from facebook redirect it will give you in the request */

$access_token = $facebook->getAccessToken();

$param_token = array('access_token' => $access_token);

$user_profile = $facebook->api('/me'); //Replace with that line

$user_profile = $facebook->api('/me','GET',$param_token);