(PHP Extension) Google Drive Refresh Access Token

Demonstrates how to automatically refresh the access token when it expires.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$success = true;

// This example uses a previously obtained access token having permission for the 
// Google Drive scope.

// The access token (and refresh token) was previously saved to a JSON file with this format:
// See Get Google Drive OAuth2 Access Token

// {
//   "access_token": "ya29.Gls-BsdxTWuenChv ... yzVIrXikkLxu5T6dy4I6GjADFardoz4Lruw",
//   "expires_in": 3600,
//   "refresh_token": "1/tMBJ ... 27D-Hk6rpQYBA",
//   "scope": "https://www.googleapis.com/auth/drive",
//   "token_type": "Bearer"
// }

$json = new CkJsonObject();
$tokenFilePath = 'qa_data/tokens/googleDrive.json';
$json->LoadFile($tokenFilePath);

$oauth2 = new CkOAuth2();
$oauth2->put_AccessToken($json->stringOf('access_token'));
$oauth2->put_RefreshToken($json->stringOf('refresh_token'));

$oauth2->put_AuthorizationEndpoint('https://accounts.google.com/o/oauth2/v2/auth');
$oauth2->put_TokenEndpoint('https://www.googleapis.com/oauth2/v4/token');

//  Replace these with actual values.
$oauth2->put_ClientId('GOOGLE-CLIENT-ID');
$oauth2->put_ClientSecret('GOOGLE-CLIENT-SECRET');
$oauth2->put_Scope('https://www.googleapis.com/auth/drive');

// Use OAuth2 to refresh the access token.
$success = $oauth2->RefreshAccessToken();
if ($success != true) {
    print $oauth2->lastErrorText() . "\n";
    exit;
}

print $oauth2->accessTokenResponse() . "\n";

// Save the new access token to our JSON file (so we can refresh it again when needed).
$json->UpdateString('access_token',$oauth2->accessToken());

$fac = new CkFileAccess();
$fac->WriteEntireTextFile($tokenFilePath,$json->emit(),'utf-8',false);

print 'Access Token Refreshed!' . "\n";

?>