Facebook Graph API, how to get users email?

Question

I'm using the Graph API, but I can't figure out how to get a logged-in users email address.

The intro to Graph states "The Graph API can provide access to all of the basic account registration data you would typically request in a sign-up form for your site, including name, email address, profile picture, and birthday"

All well and good, but how do I access that info?

This is what I have so far:

$json = $facebook->api('/me');

$first = $json['first_name']; // gets first name
$last = $json['last_name'];

Answer 1

Open base_facebook.php Add Access_token at function getLoginUrl()

array_merge(array(
                  'access_token' => $this->getAccessToken(),
                  'client_id' => $this->getAppId(),
                  'redirect_uri' => $currentUrl, // possibly overwritten
                  'state' => $this->state),
             $params);

and Use scope for Email Permission

if ($user) {
   echo $logoutUrl = $facebook->getLogoutUrl();
} else {
   echo $loginUrl = $facebook->getLoginUrl(array('scope' => 'email,read_stream'));
}

Answer 2

Make sure to fully specify the version number of the API as something like "v2.11" and not "2.11"

I'm not sure what it defaults to if this is incorrect, but I got some odd errors trying to just retrieve the email when I missed the v.

Answer 3

The email in the profile can be obtained using extended permission but I Guess it's not possible to get the email used to login fb. In my app i wanted to display mulitple fb accounts of a user in a list, i wanted to show the login emails of fb accounts as a unique identifier of the respective accounts but i couldn't get it off from fb, all i got was the primary email in the user profile but in my case my login email and my primary email are different.

Answer 4

// Facebook SDK v5 for PHP
// https://developers.facebook.com/docs/php/gettingstarted/5.0.0

$fb = new Facebook\Facebook([
  'app_id' => '{app-id}',
  'app_secret' => '{app-secret}',
  'default_graph_version' => 'v2.4',
]);

$fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
$response = $fb->get('/me?locale=en_US&fields=name,email');
$userNode = $response->getGraphUser();
var_dump(
    $userNode->getField('email'), $userNode['email']
);

Answer 5

Just add these code block on status return, and start passing a query string object {}. For JavaScript devs

After initializing your sdk.

step 1: // get login status

$(document).ready(function($) {
    FB.getLoginStatus(function(response) {
        statusChangeCallback(response);
        console.log(response);
    });
  });

This will check on document load and get your login status check if users has been logged in.

Then the function checkLoginState is called, and response is pass to statusChangeCallback

function checkLoginState() {
    FB.getLoginStatus(function(response) {
      statusChangeCallback(response);
    });
  }

Step 2: Let you get the response data from the status

function statusChangeCallback(response) {
    // body...
    if(response.status === 'connected'){
      // setElements(true);
      let userId = response.authResponse.userID;
      // console.log(userId);
      console.log('login');
      getUserInfo(userId);

    }else{
      // setElements(false);
      console.log('not logged in !');
    }
  }

This also has the userid which is being set to variable, then a getUserInfo func is called to fetch user information using the Graph-api.

function getUserInfo(userId) {
    // body...
    FB.api(
      '/'+userId+'/?fields=id,name,email',
      'GET',
      {},
      function(response) {
        // Insert your code here
        // console.log(response);
        let email = response.email;
        loginViaEmail(email);
      }
    );
  }

After passing the userid as an argument, the function then fetch all information relating to that userid. Note: in my case i was looking for the email, as to allowed me run a function that can logged user via email only.

// login via email

function loginViaEmail(email) {
    // body...
    let token = '{{ csrf_token() }}';

    let data = {
      _token:token,
      email:email
    }

    $.ajax({
      url: '/login/via/email',    
      type: 'POST',
      dataType: 'json',
      data: data,
      success: function(data){
        console.log(data);
        if(data.status == 'success'){
          window.location.href = '/dashboard';
        }

        if(data.status == 'info'){
          window.location.href = '/create-account'; 
        }
      },
      error: function(data){
        console.log('Error logging in via email !');
        // alert('Fail to send login request !');
      }
    });
  }

Answer 6

https://graph.facebook.com/me

will give you info about the currently logged-in user, but you'll need to supply an oauth token. See:

http://developers.facebook.com/docs/reference/api/user