getAccessToken();
} catch (\Facebook\Exceptions\FacebookResponseException $e) {
echo "Response Exception: " . $e->getMessage();
exit();
} catch (\Facebook\Exceptions\FacebookSDKException $e) {
echo "SDK Exception: " . $e->getMessage();
exit();
}
if (!$accessToken) {
echo "";
exit();
}
$oAuth2Client = $FB->getOAuth2Client();
if(!$accessToken->isLongLived())
$accessToken = $oAuth2Client->getLongLivedAccessToken($accessToken);
$response = $FB->get("/me?fields=id, first_name, last_name, email, picture.type(large)", $accessToken);
$userData = $response->getGraphNode()->asArray();
$_SESSION['userData'] = $userData;
$_SESSION['access_token'] = (string) $accessToken;
$email = $_SESSION['userData']['email'];
echo "";
exit();