API Facebook get graph values

<?php
require_once('facebook-php-sdk-master/src/base_facebook.php');
require_once('facebook-php-sdk-master/src/facebook.php');

// Credentials
$fb_app_id = '324097137728196';
$fb_app_secret = 'e67f4a3eaed41bd9167643efb3ecac39';

$facebook = new Facebook(array('appId'=>$fb_app_id, 'secret'=>$fb_app_secret, 'cookie'=>true));

// Permissions
$allow = 'email,user_status';

$loginurl = $facebook->getLoginUrl(array('scope'=>$allow/*, 'display'=>'popup'*/));

$get_fb_user = $facebook->getUser();

// Offline
if (is_null($get_fb_user) or $get_fb_user == 0) {

    header("Location: {$loginurl} ");
    exit;

// Online
} else {

    try {

        // Verify
        $facebook->api($get_fb_user);

        // Token
        $service_token = $facebook->getAccessToken();

        // User Details
        $fql = "SELECT uid, email, username, name, pic_square, locale FROM user WHERE uid = me()";
        $user = $facebook->api(array('method'=>'fql.query', 'query'=>$fql));


        echo '
        <ul>
            <li>User id: '.$user['0']['uid'].'</li>
            <li>User email: '.$user['0']['email'].'</li>
            <li>User name: '.$user['0']['name'].'</li>
            <li>User username: '.$user['0']['username'].'</li>
            <li>User locale: '.$user['0']['locale'].'</li>
        </ul>';

    $nameuser = $user['0']['name']

        $url = "http://graph.facebook.com/$nameuser/picture?type=large";

        $headers = get_headers($url, 1);

        if( isset($headers['Location']) ) {
            echo '<img src='.$headers['Location'].'>';
            //copy($headers['Location'],'obernardovieira.jpg');
        }
        else {
            echo "ERROR";
        }

    } catch (FacebookApiException $e) {

        header("Location: {$loginurl} ");
        exit;
    }

}
?>