Simple script to post a Tweet using XML and OAuth

update.php

<?php 
// Download the latest version of http://github.com/abraham/twitteroauth/downloads
// Move twitteroauth.php and OAuth.php into this directory.
// Register an application at http://dev.twitter.com/apps.
// Get a user access token as described in http://dev.twitter.com/pages/oauth_single_token.

require_once('twitteroauth.php');
$connection = new TwitterOAuth('app consumer key', 'app consumer secret', 'my access token', 'my access token secret');
$connection->format = 'xml';
$status = $connection->post('statuses/update', array('status' => $message));