js/plugins/ajax-contact-extend/classes/twitter/EpiTwitter.php

<?php
class EpiTwitter extends EpiOAuth
{
  const EPITWITTER_SIGNATURE_METHOD = 'HMAC-SHA1';
  protected $requestTokenUrl = '//twitter.com/oauth/request_token';
  protected $accessTokenUrl = '//twitter.com/oauth/access_token';
  protected $authorizeUrl = '//twitter.com/oauth/authorize';
  protected $apiUrl = '//twitter.com';

  public function __call($name, $params = null)
  {
  $parts  = explode('_', $name);
  $method = strtoupper(array_shift($parts));
  $parts  = implode('_', $parts);
  $url  = $this->apiUrl . '/' . preg_replace('/[A-Z]|[0-9]+/e', "'/'.strtolower('\\0')", $parts) . '.json';
  if(!empty($params))
    $args = array_shift($params);

  return new EpiTwitterJson(call_user_func(array($this, 'httpRequest'), $method, $url, $args));
  }

  public function __construct($consumerKey = null, $consumerSecret = null, $oauthToken = null, $oauthTokenSecret = null)
  {
  parent::__construct($consumerKey, $consumerSecret, self::EPITWITTER_SIGNATURE_METHOD);
  $this->setToken($oauthToken, $oauthTokenSecret);
  }
}

class EpiTwitterJson
{
  private $resp;

  public function __construct($resp)
  {
  $this->resp = $resp;
  }

  public function __get($name)
  {
  $this->responseText = $this->resp->data;
  $this->response = (array)json_decode($this->responseText, 1);
  foreach($this->response as $k => $v)
  {
    $this->$k = $v;
  }

  return $this->$name;
  }
}