Tweet with twitterOAuth

Tweet with twitterOAuth.php

<?php
session_start();

require "twitteroauth/autoload.php";
use Abraham\TwitterOAuth\TwitterOAuth;

$tw = "Tweet test";

define('CONSUMER_KEY', 'hoge');
define('CONSUMER_SECRET','foo');
define('OAUTH_CALLBACK', 'http://localhost');

$connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET,$_SESSION['oauth_token'], $_SESSION['oauth_token_secret']);

$access_token = $connection->oauth("oauth/access_token", array("oauth_verifier" => $_REQUEST['oauth_verifier']));

$_SESSION['oauth_token'] = $access_token["oauth_token"];
$_SESSION['oauth_token_secret'] = $access_token["oauth_token_secret"];

$connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET,$_SESSION['oauth_token'], $_SESSION['oauth_token_secret']);
$connection->post('statuses/update', array('status' => $tw));
?>