twitteroauthでツイート取得

gistfile1.php

<?php
/**
 * twitter 表示
 * 1時間60回
 * 1分のキャッシュ
 */
require_once getenv('DOCUMENT_ROOT').'/../lib/twitteroauth/twitteroauth/twitteroauth.php';
$consumer_key        = '';
$consumer_secret     = '';
$access_token        = '';
$access_token_secret = '';


$memcached = new Memcached();
$memcached->addServer("localhost", 11211);
if(!$req = $memcached->get('tweet')){
  $TwitterOAuth = new TwitterOAuth($consumer_key,$consumer_secret,$access_token,$access_token_secret);
	$req = $TwitterOAuth->OAuthRequest("https://api.twitter.com/1.1/statuses/user_timeline.json","GET",array(
					'screen_name'=>'',
					"count"=>"5"
			));
	$memcached->add('tweet',$req,3600);
}
header("Content-Type: text/javascript; charset=utf-8");
echo $req;