Google Access Token Empty - php

Question

I tried in codeigniter.
Below I put this code in a construct
$this->google = new Google_Client();
$this->google->setClientId(GOOGLEID);
$this->google->setClientSecret(GOOGLESECRET);
$this->google->setDeveloperKey(GOOGLEAPIKEY);
$objOAuthService = new Google_Service_Oauth2($this->google);
then in a method1 I put the below
$this->google->setRedirectUri(site_url('auth/google-login?'));
$this->google->addScope("email");
$this->google->addScope("profile");
$data['content_data']['google_login_url'] = $this->google->createAuthUrl();
$this->load->view("test", $data);
then in method2 I put the below
if (isset($_GET['code'])) {
$this->google->authenticate($_GET['code']);
$token = $this->google->getRefreshToken();
echo $token;
}
You can see that I tried to print the $token but it's empty.
My Question is WHY is it empty?
EDIT:
echo $this->google->getAccessToken();
Even the getAccessToken returns empty.

Answer 1

I just fixed it.
My Solution is that in the construct I have
$this->google = new Google_Client();
$this->google->setClientId(GOOGLEID);
$this->google->setClientSecret(GOOGLESECRET);
$this->google->setDeveloperKey(GOOGLEAPIKEY);
$this->google->setRedirectUri(site_url('auth/google-login?'));
$this->google->addScope("email");
$this->google->addScope("profile");
in method1 I only have this
$data['content_data']['google_login_url'] = $this->google->createAuthUrl();
$this->load->view("test", $data);
and in method2 I have this
if (isset($_GET['code'])) {
$this->google->authenticate($_GET['code']);
$token = $this->google->getAccessToken();
var_dump($token);
}
and here the $token already now has value

Answer 2

Here is the working code which I'm using in Laravel and Codeigniter.
// Initial config
$client = new Google_Client();
$client->setApplicationName(APP_NAME);
$client->setClientId(CLIENT_ID);
$client->setClientSecret(CLIENT_SECRET);
$client->setRedirectUri(REDIRECT_URI);
$client->setScopes(array(SCOPE_A));
// To retrieve refresh token forcefully
// This will ask for permission everytime.
$client->setApprovalPrompt('force');
$client->setAccessType('offline');
// Return url data part
if (isset($_GET['code'])) {
// Log the user in
$client->authenticate($_GET['code']);
// Get acess token and refresh token
$getAccesToken = $client->getAccessToken();
$getRefreshToken = $client->getRefreshToken();
}
else
{
// Return to login
$googleAuthUrl = $client->createAuthUrl();
// Redirect user to authentication URI
}
I hope this helps.