Как опубликовать поток / момент в Google, используя переполнение стека

Так же, как Facebook и Twitter, я хочу добавить пост в Google+, используя PHP с моего сайта, но он не работает.

Я искал в Интернете, и он всегда говорит, что невозможно добавлять потоки с помощью API. Это верно? Если нет, то какое решение лучше?

<?php
/*
* Copyright 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
include_once "templates/base.php";
session_start();

require_once realpath(dirname(__FILE__) . '/../src/Google/autoload.php');

/************************************************
We'll setup an empty 20MB file to upload.
************************************************/
DEFINE("TESTFILE", 'testfile.txt');
if (!file_exists(TESTFILE)) {
$fh = fopen(TESTFILE, 'w');
fseek($fh, 1024*1024*20);
fwrite($fh, "!", 1);
fclose($fh);
}

/************************************************
ATTENTION: Fill in these values! Make sure
the redirect URI is to this page, e.g:
http://localhost:8080/fileupload.php
************************************************/
$client_id = 'xxxxxxxxxx-zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.apps.googleusercontent.com';
$client_secret = 'xxxxxxxxxxxxxxxxx';
$redirect_uri = 'http://www.objectinstance.com/share/google1/examples/fileupload.php';

$client = new Google_Client();
$client->setClientId($client_id);
$client->setClientSecret($client_secret);
$client->setRedirectUri($redirect_uri);
$client->addScope("https://www.googleapis.com/auth/plus.login");
$service = new Google_Moment($client);

if (isset($_REQUEST['logout'])) {
unset($_SESSION['upload_token ']);
}

if (isset($_GET['code'])) {
$client->authenticate($_GET['code']);
$_SESSION['upload_token'] = $client->getAccessToken();
$redirect = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
header('Location: ' . filter_var($redirect, FILTER_SANITIZE_URL));
}

if (isset($_SESSION['upload_token']) && $_SESSION['upload_token']) {
$client->setAccessToken($_SESSION['upload_token']);
if ($client->isAccessTokenExpired()) {
unset($_SESSION['upload_token']);
}
} else {
$authUrl = $client->createAuthUrl();
}

/************************************************
If we're signed in then lets try to upload our
file.
************************************************/
if ($client->getAccessToken()) {
$moment_body = new Google_Service_Plus();
$moment_body->setType("http://schema.org/AddAction");
$item_scope = new Google_ItemScope();
$item_scope->setUrl("https://developers.google.com/+/plugins/snippet/examples/thing");
$moment_body->setObject($item_scope);
$momentResult = $plus->moments->insert('me', 'vault', $moment_body);

# This example shows how to create moment that does not have a URL.
$moment_body = new Google_Moment();
$moment_body->setType("http://schema.org/AddAction");
$item_scope = new Google_ItemScope();
$item_scope->setId("target-id-1");
$item_scope->setType("http://schema.org/AddAction");
$item_scope->setName("The Google+ Platform");
$item_scope->setDescription("A page that describes just how awesome Google+ is!");
$item_scope->setImage("https://developers.google.com/+/plugins/snippet/examples/thing.png");
$moment_body->setObject($item_scope);
$momentResult = $plus->moments->insert('me', 'vault', $moment_body);
}
echo pageHeader("File Upload - Uploading a large file");
if (
$client_id == '<YOUR_CLIENT_ID>'
|| $client_secret == '<YOUR_CLIENT_SECRET>'
|| $redirect_uri == '<YOUR_REDIRECT_URI>') {
echo missingClientSecretsWarning();
}
?>
<div class="box">
<div class="request">
<?php
if (isset($authUrl)) {
echo "<a class='login' href='" . $authUrl . "'>Connect Me!</a>";
}
?>
</div>

<div class="shortened">
<?php
if (isset($result) && $result) {
var_dump($result);
}
?>
</div>
</div>
<?php
echo pageFooter(__FILE__);