Facebook PHP SDK $uid = $facebook->getUser() always returns 0 [duplicate]

Question

This question already has answers here:

Why is Facebook PHP SDK getUser always returning 0? (26 answers)

Closed 7 years ago.

I am trying to integrate our DB with the facebook API , really new on this so I would appreciate some help.

I am always getting 0

Using

$uid = $facebook->getUser()

I had a look to similar issues but didn't find a related solution.

PHP

if($_REQUEST['action']=="signup" && $_REQUEST['auth']=="facebook" && !empty ($_REQUEST['auth'])  && !empty ($_REQUEST['action']) )
{

require_once('libs/facebook/src/facebook.php');

$config = array();
$config['appId'] = 'xxxx';
$config['secret'] = 'xxxxxx';

$facebook = new Facebook($config);
$uid = $facebook->getUser();
echo $uid;
}

//else {} normal sign up here with all the error checking

HTML

<div class="fb-login-class">
      <div class="fb-login-button" autologoutlink="true" scope="publish_stream" perms="email,user_birthday" data-show-faces="false"
      data-width="200" data-max-rows="1"></div>
</div>

JAVASCRIPT / JQUERY

window.fbAsyncInit = function() {
    // init the FB JS SDK
    FB.init({
      appId      : 'XXXX,                        // App ID from the app dashboard
      channelUrl : '//WWW.XXXX.com', // Channel file for x-domain comms
      status     : true,                                 // Check Facebook Login status
      xfbml      : true                                  // Look for social plugins on the page
    });



    // Additional initialization code such as adding Event Listeners goes here
     // will be handled. 
  FB.Event.subscribe('auth.authResponseChange', function(response) {
    // Here we specify what we do with the response anytime this event occurs. 
    if (response.status === 'connected') {


      loginfunction();
    } else if (response.status === 'not_authorized') {

      FB.login(function(response) {},{scope: 'email'});
    } else {

      FB.login(function(response) {},{scope: 'email'});
    }
  });
  };

(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/en_GB/all.js#xfbml=1&appId=XXXXX";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));


function loginfunction() {
    console.log('Welcome!  Fetching your information.... ');
    FB.api('/me', function (response) {
        console.log(response);
/*I can see all the data here and the button also changes so I know that I am logged in */
        var data = 'action=signup&username=' + response.username + '&firstname=' + response.first_name + '&gender=' + response.gender + '&lastname=' + response.last_name + '&email=' + response.email + '&dob=' + "xxxx" + '&auth=facebook';
/*What's the point in passing all these parameters through ? only need to pass &auth=facebook and action=signup I guess the rest can be manipulated anyway so what's the point 
need to get them from PHP SDK (server side ajax call) */

        $.ajax({
            type: "POST",
            url: "actions/do_signup.php",
            data: data,
            beforeSend: function (html) {},
            success: function (html) {
                if (html == "success") {
                    window.location.replace("index.php");
                } else {}
            }
        });
    }, {
        scope: 'email'
    });
}

thanks

EDIT tried that only with PHP still failed

require('facebook.php');
$facebook = new Facebook( array (
    'appId'  => 'xxx',
    'secret' => 'xxxx',
    'cookie' => true
  )
);


if ($_REQUEST['act']=="fb")
{
//$next_url = $facebook->getLoginStatusUrl($params);

if ($facebook->getUser()) {
       $userProfile = $facebook->api('/me');
       $uid = $facebook->getUser();
       // do logic
       echo  $uid ;
       echo "ok";
    } else {
    echo "problem";
      $loginUrl = $facebook->getLoginUrl($params = array('scope' => user_birthday,read_stream,'redirect_uri' => 'http://xxxx/index.php?act=success'));
      header('Location:' . $loginUrl);

    }
}
else if ($_REQUEST['act']=="success")
{
  try{
      $_SESSION['fbAT'] = $facebook->getAccessToken();
    }catch(Exception $e){
      trigger_error("FB AccessToken: " . $e->getMessage());
    }    
$facebook->setAccessToken($_SESSION['fbAT']);

if ($facebook->getUser()) {
        $uid = $facebook->getUser();
       $userProfile = $facebook->api('/me');

       // do logic
       echo  $uid ;
       echo $userProfile;
       echo "ok";
    } else {
    $uid = $facebook->getUser();
    echo  $uid ;
    echo "still problem";


    }

Some steps that I have tried:

• Sandbox Mode is disabled and I have confirmed the app id and secret as well...
• Tried adding header : header('P3P:CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"');
• Added cookie' => true
• Try calling it from a static page not through ajax still 0
• Only website is used under facebook basic tab
• Under advanced app type is set to web
• Under permissions default activity is public
• Made sure that fb_ca_chain_bundle.crt is in the same dir that facebook.php also tried to use a different dir (the same with my php file)
  • Trying only PHP and getLoginUrl with additional scope to get access.
  • Trying getting and setting an access token

Answer 1

In window.fbAsyncInit I have set cookie and oauth to true and this worked!

cookie:true,    
oauth : true.

Make sure that In your php you also have

cookie' => true.

That will enable the php code to integrare with the JS.

Answer 2

And you need to make sure the user has logged in with:

$loginUrl = $facebook->getLoginUrl(array( 'scope' => 'read_stream,etc..'));

The scope is defined by the permissions stated here

After that you should be able to do:

$user = $facebook->api("/me");

Which will get an array associated with the user, $user['id'] is probably the one you'll want to store as well as any other information like email address - be sure to request for email in the scope

Hope that solves the problem!