(PHP ActiveX) Google Drive Refresh Access Token

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

$success = 1;

// 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"
// }

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json = new COM("Chilkat.JsonObject");
$tokenFilePath = 'qa_data/tokens/googleDrive.json';
$json->LoadFile($tokenFilePath);

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.OAuth2')
$oauth2 = new COM("Chilkat.OAuth2");
$oauth2->AccessToken = $json->stringOf('access_token');
$oauth2->RefreshToken = $json->stringOf('refresh_token');

$oauth2->AuthorizationEndpoint = 'https://accounts.google.com/o/oauth2/v2/auth';
$oauth2->TokenEndpoint = 'https://www.googleapis.com/oauth2/v4/token';

//  Replace these with actual values.
$oauth2->ClientId = 'GOOGLE-CLIENT-ID';
$oauth2->ClientSecret = 'GOOGLE-CLIENT-SECRET';
$oauth2->Scope = 'https://www.googleapis.com/auth/drive';

// Use OAuth2 to refresh the access token.
$success = $oauth2->RefreshAccessToken();
if ($success != 1) {
    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);

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.FileAccess')
$fac = new COM("Chilkat.FileAccess");
$fac->WriteEntireTextFile($tokenFilePath,$json->emit(),'utf-8',0);

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

?>