Twitter API 1.1

/* Make a developers account on twitter, create an app and get the consumer key/secret. */
$key = '[key here]';
$secret = '[secret here'];
$postdata = http_build_query(array('grant_type' => 'client_credentials'));
$opts = array('http' => array('method'  => 'POST',
                'header'  => "Authorization: Basic ".base64_encode($key . ':' . $secret)."\r\nContent-Type: application/x-www-form-urlencoded;charset=UTF-8",
                'content' => $postdata));
$context = stream_context_create($opts);
$data =  json_decode(file_get_contents('https://api.twitter.com/oauth2/token', false, $context));
echo $data->access_token;

/* get this access_token and write it down somewhere. */

/* Now to use the Twitter API */
$access_token = '[access code here]';
$opts = array('http' => array('method'  => 'GET',
                                      'header'  => "Authorization: Bearer " . $access_token . "\r\nContent-Type: application/x-www-form-urlencoded;charset=UTF-8"));
$context = stream_context_create($opts);
$data = json_decode(file_get_contents('https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=twitterapi&count=2', false, $context));
var_dump($data);