This here works very good, maybe it could help anybody:
index.php
session_start();
require_once __DIR__.'/client.php';
if(!isset($obj->error) && isset($_SESSION['access_token']) && $_SESSION['access_token'] && isset($obj->expires_in)) {
?>
<!DOCTYPE html>
<html>
<head>
<title>Google API Token Test</title>
<meta charset='utf-8' />
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script>
search('Music Mix 2010');
function search(q) {
$.ajax({
type: 'GET',
url: 'action.php?q='+q,
success: function(data) {
if(data == 'refresh') location.reload();
else $('#response').html(JSON.stringify(JSON.parse(data)));
}
});
}
</script>
</head>
<body>
<div id="response"></div>
</body>
</html>
<?php
}
else header('Location: '.filter_var('https://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']).'/oauth2callback.php', FILTER_SANITIZE_URL));
?>
oauth2callback.php
require_once __DIR__.'/vendor/autoload.php';
session_start();
$client = new Google_Client();
$client->setAuthConfigFile('auth.json');
$client->setAccessType('offline');
$client->setApprovalPrompt('force');
$client->setRedirectUri('https://'.filter_var($_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'], FILTER_SANITIZE_URL));
$client->addScope(Google_Service_YouTube::YOUTUBE_FORCE_SSL);
if(isset($_GET['code']) && $_GET['code']) {
$client->authenticate(filter_var($_GET['code'], FILTER_SANITIZE_STRING));
$_SESSION['access_token'] = $client->getAccessToken();
$_SESSION['refresh_token'] = $_SESSION['access_token']['refresh_token'];
setcookie('refresh_token', $_SESSION['refresh_token'], time()+60*60*24*180, '/', filter_var($_SERVER['HTTP_HOST'], FILTER_SANITIZE_URL), true, true);
header('Location: '.filter_var('https://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']), FILTER_SANITIZE_URL));
exit();
}
else header('Location: '.filter_var($client->createAuthUrl(), FILTER_SANITIZE_URL));
exit();
?>
client.php
// https://developers.google.com/api-client-library/php/start/installation
require_once __DIR__.'/vendor/autoload.php';
$client = new Google_Client();
$client->setAuthConfig('auth.json');
$client->setAccessType('offline');
$client->setApprovalPrompt('force');
$client->addScope(Google_Service_YouTube::YOUTUBE_FORCE_SSL);
// Delete Cookie Token
#setcookie('refresh_token', @$_SESSION['refresh_token'], time()-1, '/', filter_var($_SERVER['HTTP_HOST'], FILTER_SANITIZE_URL), true, true);
// Delete Session Token
#unset($_SESSION['refresh_token']);
if(isset($_SESSION['refresh_token']) && $_SESSION['refresh_token']) {
$client->refreshToken($_SESSION['refresh_token']);
$_SESSION['access_token'] = $client->getAccessToken();
}
elseif(isset($_COOKIE['refresh_token']) && $_COOKIE['refresh_token']) {
$client->refreshToken($_COOKIE['refresh_token']);
$_SESSION['access_token'] = $client->getAccessToken();
}
$url = 'https://www.googleapis.com/oauth2/v1/tokeninfo?access_token='.urlencode(@$_SESSION['access_token']['access_token']);
$curl_handle = curl_init();
curl_setopt($curl_handle, CURLOPT_URL, $url);
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'Google API Token Test');
$json = curl_exec($curl_handle);
curl_close($curl_handle);
$obj = json_decode($json);
?>
action.php
session_start();
require_once __DIR__.'/client.php';
if(isset($obj->error)) {
echo 'refresh';
exit();
}
elseif(isset($_SESSION['access_token']) && $_SESSION['access_token'] && isset($obj->expires_in) && isset($_GET['q']) && !empty($_GET['q'])) {
$client->setAccessToken($_SESSION['access_token']);
$service = new Google_Service_YouTube($client);
$response = $service->search->listSearch('snippet', array('q' => filter_input(INPUT_GET, 'q', FILTER_SANITIZE_SPECIAL_CHARS), 'maxResults' => '1', 'type' => 'video'));
echo json_encode($response['modelData']);
exit();
}
?>