How to Fetch User's Email Using Facebook

Facebook Graph API, how to get users email?

The only way to get the users e-mail address is to request extended permissions on the email field. The user must allow you to see this and you cannot get the e-mail addresses of the user's friends.

http://developers.facebook.com/docs/authentication/permissions

You can do this if you are using Facebook connect by passing scope=email in the get string of your call to the Auth Dialog.

I'd recommend using an SDK instead of file_get_contents as it makes it far easier to perform the Oauth authentication.

How to get users email and fd id using facebook login with graph api

The same way you access name. i.e

response.email and response.id

but to fetch email address you must have the permission to access it.

Add scope="email" to your FB Login Button.

[EDIT]

function login() {
    FB.login(function(response) {
        if (response.authResponse) {
            // connected
        testAPI();
        } else {
            // cancelled
        }
    }, { scope: 'email' });
    }

function testAPI() {

    console.log('Welcome!  Fetching your information.... ');
    FB.api('/me', function(response) {

        console.log('Good to see you, ' + response.name + '.' + ' Email: ' + response.email + ' Facebook ID: ' + response.id);
    });
}

Here's a good tutorial for beginners: http://www.loginworks.com/technical-blogs/404-working-with-facebook-javascript-sdk

how to get user email in facebook graph api

You have to authorize users with the email permission:

$dialog_url = 'http://www.facebook.com/dialog/oauth?client_id=' . FACEBOOK_APP_ID . '&redirect_uri=' . $callback_url . '&scope=email';

Source: https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow

How Can I Get User Email With Facebook Login Button?

Accualy i need full code example. Because i think facebook documents are complicated. (Or for me) And I found a solution internet. Here you can see below;

FB Login Button:

<div class="fb-login-button" data-max-rows="1" data-size="large" data-show-faces="false" data-auto-logout-link="true" data-scope="email,user_hometown,user_birthday,user_education_history,user_website,user_work_history"></div>

FB Sdk initialize:

(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src = "//connect.facebook.net/tr_TR/sdk.js#xfbml=1&version=v2.4&appId=***********";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));

Getting other user information:

  window.fbAsyncInit = function() {
    FB.init({
      appId      : '************', // Set YOUR APP ID
      channelUrl : 'http://hayageek.com/examples/oauth/facebook/oauth-javascript/channel.html', // Channel File
      status     : true, // check login status
      cookie     : true, // enable cookies to allow the server to access the session
      xfbml      : true,  // parse XFBML
      version    : 'v2.4',
      oauth      : true
    });

    FB.Event.subscribe('auth.authResponseChange', function(response) 
    {
     if (response.status === 'connected') 
    {
        console.log("<br>Connected to Facebook");
        //SUCCESS
        FB.api('/me', { locale: 'tr_TR', fields: 'name, email,birthday, hometown,education,gender,website,work' },
          function(response) {
            console.log(response.email);
            console.log(response.name);
            console.log(response.gender);
            console.log(response.birthday);
            console.log(response.hometown);
            console.log(response.education);
            console.log(response.website);
            console.log(response.work);
          }
        );

    }    
    else if (response.status === 'not_authorized') 
    {
        console.log("Failed to Connect");

        //FAILED
    } else 
    {
        console.log("Logged Out");

        //UNKNOWN ERROR
    }
    }); 

    };

how to get user facebook email id (that is used for login)

Given that revealing a person's email without consent would be a violation of that person's privacy, this is not possible.

The only way to get access to this data would be to have the user grant the email permission to your app, at which point you could use /me?fields=email.

How to get Users Email Id in Facebook application using PHP?

You can get the Email Address, directly without using the FQL.

// initialize facebook
 $facebook = new Facebook(array(
        'appId' => APP_ID,
        'secret' => APP_SECRET));

 $session = $facebook->getSession();
 if ($session) {
 try {
    $fbme = $facebook->api('/me');
  } catch (FacebookApiException $e) {
    error_log($e);
  }
}
else
{
  echo "You are NOT Logged in";
}

//getting the login page if not signned in
if (!$fbme) {
  $loginUrl = $facebook->getLoginUrl(array('canvas' => 1,
                                      'fbconnect' => 0,
                                      'req_perms' =>                   'email,user_birthday,publish_stream',
                                      'next' => CANVAS_PAGE,
                                      'cancel_url' => CANVAS_PAGE ));
 echo '<fb:redirect url="' . $loginUrl . '" />';
 } else {

      // $fbme is valid i.e. user can access our app
     echo "You can use this App";
 }

 // getting the profile data
 $user_id = $fbme[id];
 $name=$fbme['name'];
 $first_name=$fbme['first_name'];
 $last_name=$fbme['last_name'];
 $facebook_url=$fbme['link'];
 $location=$fbme['location']['name'];
 $bio_info=$fbme['bio'];
 $work_array=$fbme['work'];
 $education_array=$fbme["education"];
 $email=$fbme['email'];
 $date_of_birth=$fbme['birthday'];

This code worked for me..and i go all the information needed with the Email ID.

NOTE: User has to allow us to get their Information during the Approval of Application.

Get Email address of Facebook user from post comments

You just need to use the correct syntax for the Field Expansion that you’re already making use of:

feed?fields=message,id,description,created_time,from,comments{from,email, id,created_time,message},story

The email of the comment creator would be a “property” of the from structure, so you can use

/feed?fields=comments{from{id,name,email},…}

to get the email of people who commented (and granted your app permission to read their e-mail upfront.)

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