'1769547763228381', 'app_secret' => '8f6335f6d9834f78f0c362d9db15d29b', 'default_graph_version' => 'v3.0', ]); $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 '

Access Token

'; var_dump($accessToken->getValue()); $_SESSION['fb_access_token'] = (string)$accessToken;