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Facebook javascript login for PHP SDK

I am using the facebook-php-sdk-v4-5.0-dev.zip FB API files.

I am trying to make javascript and php SDK files to work on Facebook. I have a working find FB.login, I can do graph queries, etc. Now I want to pass an access token to my PHP code and continue from there. I am initializing FB in javascript:

window.fbAsyncInit = function() {
    FB.init({
        appId      : appId, //my appId
        cookie     : true,  // enable cookies for session access
        xfbml      : true,  // parse social plugins on this page
        version    : 'v2.2' // use version 2.2
    });

And now that the FB is in initialized, I do some other work using the API, after which I push my php code with:

window.location.replace(<my url>.php);

Inside my PHP application, I have the following:

$fb = new Facebook\Facebook([ 'app_id' => <my app_id>,
                              'app_secret' => <my app_secret>
                              'default_graph_version' => 'v2.2',
                            ]);

$jsHelper = $fb->getJavaScriptHelper();
try 
{
    $accessToken = $jsHelper->getAccessToken();
} 
catch(Facebook\Exceptions\FacebookResponseException $e) 
{
    // When Graph returns an error
    print('Graph returned an error: ' . $e->getMessage() );
    exit;
}
catch(Facebook\Exceptions\FacebookSDKException $e) 
{
    // When validation fails or other local issues
    print( 'Facebook SDK returned an error: ' . $e->getMessage() );
    exit;
}

if (isset($accessToken)) 
{
    print("Logged in already");
}
else
{
    print("Not logged in");
}

What I see is "not logged in". From what I can tell, the cookie is not being generated (I threw out the $ _COOKIE at the top of my PHP file). I also tracked network calls and can't see the cookie coming down from Facebook on my oauth requests ... this is where I assume such a cookie would be generated.

Thanks, Andy

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2 answers


You need to set the cookie to true when initializing the javascript object. Otherwise the FB Javascript Api will not store the cookie.



FB.init({
    appId   : '{app-id}',
    cookie  : true,
    version : 'v2.5'
});
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I would recommend that you update the v5.0.0 PHP SDK, or is there a specific reason why you are using this deprecated version?

Also, take a look at the example in



Copied example code:

# /js-login.php
$fb = new Facebook\Facebook([
  'app_id' => '{app-id}',
  'app_secret' => '{app-secret}',
  'default_graph_version' => 'v2.2',
  ]);

$helper = $fb->getJavaScriptHelper();

try {
  $accessToken = $helper->getAccessToken();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
  // When Graph returns an error
  echo 'Graph returned an error: ' . $e->getMessage();
  exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
  // When validation fails or other local issues
  echo 'Facebook SDK returned an error: ' . $e->getMessage();
  exit;
}

if (! isset($accessToken)) {
  echo 'No cookie set or no OAuth data could be obtained from cookie.';
  exit;
}

// Logged in
echo '<h3>Access Token</h3>';
var_dump($accessToken->getValue());

$_SESSION['fb_access_token'] = (string) $accessToken;

// User is logged in!
// You can redirect them to a members-only page.
//header('Location: https://example.com/members.php');
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