<?php
set_include_path('ZendFramework-1.11.11-minimal/library/'.get_include_path());

require_once 'Zend/Oauth/Consumer.php';
require_once 'Zend/Gdata/Docs.php';

$CONSUMER_KEY =
$CONSUMER_SECRET =
$USER =

$oauthOptions = array(
    'requestScheme' => Zend_Oauth::REQUEST_SCHEME_HEADER,
    'version' => '1.0',
    'signatureMethod' => 'HMAC-SHA1',
    'consumerKey' => $CONSUMER_KEY,
    'consumerSecret' => $CONSUMER_SECRET
);

$consumer = new Zend_Oauth_Consumer($oauthOptions);
$token = new Zend_Oauth_Token_Access();
$httpClient = $token->getHttpClient($oauthOptions);

$client = new Zend_Gdata_Docs($httpClient);

// Retrieve user's list of Google Docs
$feed = $client->getDocumentListFeed('https://docs.google.com/feeds/default/private/full?xoauth_requestor_id=' . urlencode($USER));
foreach ($feed->entries as $entry) {
  echo "$entry->title\n";
}