Facebook API image circle php

<?php
/*  FACEBOOK LOGIN BASIC - PHP

/* INCLUSION OF LIBRARY FILEs*/
    require_once( 'lib/Facebook/FacebookSession.php');
    require_once( 'lib/Facebook/FacebookRequest.php' );
    require_once( 'lib/Facebook/FacebookResponse.php' );
    require_once( 'lib/Facebook/FacebookSDKException.php' );
    require_once( 'lib/Facebook/FacebookRequestException.php' );
    require_once( 'lib/Facebook/FacebookRedirectLoginHelper.php');
    require_once( 'lib/Facebook/FacebookAuthorizationException.php' );
    require_once( 'lib/Facebook/GraphObject.php' );
    require_once( 'lib/Facebook/GraphUser.php' );
    require_once( 'lib/Facebook/GraphSessionInfo.php' );
    require_once( 'lib/Facebook/Entities/AccessToken.php');
    require_once( 'lib/Facebook/HttpClients/FacebookCurl.php' );
    require_once( 'lib/Facebook/HttpClients/FacebookHttpable.php');
    require_once( 'lib/Facebook/HttpClients/FacebookCurlHttpClient.php');

/* USE NAMESPACES */

    use Facebook\FacebookSession;
    use Facebook\FacebookRedirectLoginHelper;
    use Facebook\FacebookRequest;
    use Facebook\FacebookResponse;
    use Facebook\FacebookSDKException;
    use Facebook\FacebookRequestException;
    use Facebook\FacebookAuthorizationException;
    use Facebook\GraphObject;
    use Facebook\GraphUser;
    use Facebook\GraphSessionInfo;
    use Facebook\FacebookHttpable;
    use Facebook\FacebookCurlHttpClient;
    use Facebook\FacebookCurl;

/*PROCESS*/

/*PROCESS*/

//1.Stat Session
     session_start();

    //check if users wants to logout
     if(isset($_REQUEST['logout'])){
        unset($_SESSION['fb_token']);
     }

    //2.Use app id,secret and redirect url
    $app_id = '{APP-ID}';
    $app_secret = '{SECRET-ID}';
    $redirect_url='http://{website}/fbtest/';

    //3.Initialize application, create helper object and get fb sess
     FacebookSession::setDefaultApplication($app_id,$app_secret);
     $helper = new FacebookRedirectLoginHelper($redirect_url);
     $sess = $helper->getSessionFromRedirect();

    //check if facebook session exists
    if(isset($_SESSION['fb_token'])){
        $sess = new FacebookSession($_SESSION['fb_token']);
    }

    //logout
    $logout = 'http://{website}//fbtest/logout.html';

    //4. if fb sess exists echo name
        if(isset($sess)){
            //store the token in the php session
            $_SESSION['fb_token']=$sess->getToken();
            //create request object,execute and capture response
            $request = new FacebookRequest($sess,'GET','/me');
            // from response get graph object
            $response = $request->execute();
            $graph = $response->getGraphObject(GraphUser::classname());
            // use graph object methods to get user details
            $name = $graph->getName();
            $id = $graph->getId();
            $image = 'https://graph.facebook.com/'.$id.'/picture?width=150';
            $email = $graph->getProperty('email');
            echo "hi $name <br>";
            echo "<img src='$image' class='circle' /><br><br>";


echo "<style>
.circle {
  display: block;
  width: 150px;
  height: 150px;
 -webkit-border-radius: 99em;
  -moz-border-radius: 99em;
  border-radius: 99em;
  border: 5px solid #eee;
  box-shadow: 0 3px 2px rgba(0, 0, 0, 0.3);

}
</style>";
        }else{
            //else echo login
            echo '<a href="'.$helper->getLoginUrl(array('email')).'" >Login with facebook</a>';
        }