Refreshing Tokens with Google API for Google Calendar v3

Question

I\'m trying to use Google API (PHP) to perform a daily sync between a system calendar and the user\'s Google Calendars. I want a system user to be able to set up access to t

Answer 1

Well, during your authorization with Google, you will receive a token that will expire in 3600 seconds or one hour and it is normal to be expired. So you need to use refresh token to get a new working token.

Here are the steps that you need:

$token = $client->getAccessToken();
$authObj = json_decode($token);
if(isset($authObj->refresh_token)) {
save_refresh_token($authObj->refresh_token);
}

It is important to save this refresh_token, then you can update it with

$client->refreshToken($your_saved_refresh_token);

And then set your new access token to the session:

$_SESSION['access_token'] = $client->getAccessToken();

For more information, check this SO question.