I need some solution with Google API Oauth - php

Question

I'm trying to pull my list of Google contacts and display on a page the name and phone number.
I found an interesting post made by Lorna Jane and tried her code. I get a token returned, but every time I revisit the page, it asks me to authenticate again. With current code, no data array is pulled:
$id = 'secret.apps.googleusercontent.com';
$scope = 'https://www.google.com/m8/feeds/default/full/';
$uri = 'http://example.com/callback.php';
$params = array(
'response_type' => 'code',
'client_id' => $id,
'redirect_uri' => $uri,
'scope' => $scope
);
$query = 'https://accounts.google.com/o/oauth2/auth?' . http_build_query($params);
header('Location: ' . filter_var($query, FILTER_SANITIZE_URL));
if (isset($_GET['code']))
{
$code = $_GET['code'];
$token = 'https://accounts.google.com/o/oauth2/token';
$params = array(
'code' => $code,
'client_id' => $id,
'client_secret' => 'clientsecret',
'redirect_uri' => $uri,
'grant_type' => 'authorization_code'
);
$request = new HttpRequest($token, HttpRequest::METH_POST);
$request->setPostFields($params);
$request->send();
$responseObj = json_decode($request->getResponseBody());
var_dump($responseObj);
}
Please let me know what I'm missing. I prefer the pecl_http implementation, over the Google API library.