TwitterProvider.php

<?php
// $ zf enable config.provider Wozozo_Service_Twitter_Tool_Twitter

require_once 'Zend/Tool/Framework/Provider/Abstract.php';

class Wozozo_Service_Twitter_Tool_Twitter extends Zend_Tool_Framework_Provider_Abstract
{
    const CONFIG_KEY = 'twitter';
    const SITE_URL = 'http://twtter.com/oauth';

    /**
     * @var array|Zend_Config
     */
    private $_config;

    /**
     * @var Zend_Service_Twitter
     */
    private $_service;

    public function update($msg)
    {
        $this->getService()->status->update($msg);
    } 

    protected function getService()
    {
        if (!$this->_service) {
            require_once 'Zend/Service/Twitter.php';
            if (!$this->_config) {
                $this->_config = $this->_loadConfig();
            }

            $this->_service = new Zend_Service_Twitter($this->_config);
        }

        return $this->_service;
    }


    /**
     * .zf.ini
     *
     * twitter.username = "***"
     * twitter.accessToken = "***"
     * twitter.accessTokenSecret = "***"
     * twitter.consumerKey = "***"
     * twitter.consumerSecret = "***"
     */
    private function _loadConfig()
    {
         $userConfig = $this->_registry->getConfig();
         $key = self::CONFIG_KEY;
         $twitterConfig = $userConfig->$key;

         if ($accessToken = $twitterConfig->accessToken and
                $accessTokenSecret = $twitterConfig->accessTokenSecret) {
                require_once 'Zend/Oauth/Token/Access.php';
                $token = new Zend_Oauth_Token_Access;
                $token->setToken($accessToken);
                $token->setTokenSecret($accessTokenSecret);
         } else {
             throw new Exception('require access token');
         }

         $config = array_merge(array('consumerKey' => $twitterConfig->consumerKey,
                                'consumerSecret' => $twitterConfig->consumerSecret,
                                'siteUrl' => self::SITE_URL
                                ),
                          array('username' => $twitterConfig->username,
                                'accessToken' => $token)
                          );
        return $config;
    }

}


//non zf command
if (count(debug_backtrace())) return;
/** configure */
$username = ''
$accessToken = '';
$accessTokenSecret = '';
$consumerKey = '';
$consumerSecret = '';
/**************/


class Ext extends Wozozo_Service_Twitter_Tool_Twitter
{
    public function setConfig($config)
    {
        $this->_config = $config;
    }
}
require_once 'Zend/Oauth/Token/Access.php';
$token = new Zend_Oauth_Token_Access;
$token->setToken($accessToken);
$token->setTokenSecret($accessTokenSecret);

$oconfig = array('consumerKey' => $consumerKey , 
                 'consumerSecret' => $consumerSecret,
                 'siteUrl' => 'http://twitter.com/oauth',
                               );

$config = array_merge($oconfig, array('username' => $username, 'accessToken' => $token));

$twitter = new Ext();
$twitter->setConfig($config);
var_dump($twitter->getService()->status->update('test'));