Parse error: syntax error, unexpected T_OBJECT_OPERATOR in
/home/.../src/Facebook/FacebookSession.php on line 89

$me = (new FacebookRequest(
$session, 'GET', '/me'
))->execute()->getGraphObject(GraphUser::className());

<?php

require_once( 'src/Facebook/FacebookSession.php' );
require_once( 'src/Facebook/FacebookRedirectLoginHelper.php' );
require_once( 'src/Facebook/FacebookRequest.php' );
require_once( 'src/Facebook/FacebookResponse.php' );
require_once( 'src/Facebook/FacebookSDKException.php' );
require_once( 'src/Facebook/FacebookRequestException.php' );
require_once( 'src/Facebook/FacebookAuthorizationException.php' );
require_once( 'src/Facebook/GraphObject.php' );

use srcFacebookFacebookSession;
use srcFacebookFacebookRedirectLoginHelper;
use srcFacebookFacebookRequest;
use srcFacebookFacebookResponse;
use srcFacebookFacebookSDKException;
use srcFacebookFacebookRequestException;
use srcFacebookFacebookAuthorizationException;
use srcFacebookGraphObject;

// start session
session_start();

// init app with app id and secret
FacebookSession::setDefaultApplication( 'xxxxxxxxxxxx','xxxxxxxxxxxxxxxxxxxxxxxxxxx' );

$helper = new FacebookRedirectLoginHelper('your redirect URL here');
$loginUrl = $helper->getLoginUrl();
// Use the login url on a link or button to redirect to Facebook for authentication

$helper = new FacebookRedirectLoginHelper();
try {
$session = $helper->getSessionFromRedirect();
} catch(FacebookRequestException $ex) {
// When Facebook returns an error
} catch(Exception $ex) {
// When validation fails or other local issues
}
if ($session) {
// Logged in
}
?>

throw new FacebookSDKException(
    'Session not active, could not store state.'
  );
}

throw new FacebookSDKException(
    'Session not active, could not load state.'
);