(PHP ActiveX) Okta: Refresh Access Token with the Auth Code Flow

Demonstrates how to refresh a token that was obtained using the authorization code flow.

For more information, see https://developer.okta.com/docs/guides/implement-auth-code-pkce/use-flow/

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.

// See Get Okta Access Token using Authorization Code Flow with PKCE 
// for sample code showing how to obtain an Okta access token using the authorization code flow for native apps (with PKCE).

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonToken = new COM("Chilkat.JsonObject");
$success = $jsonToken->LoadFile('qa_data/tokens/okta.json');
if ($success != 1) {
    print 'Failed to load myob.json' . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.OAuth2')
$oauth2 = new COM("Chilkat.OAuth2");

$oauth2->TokenEndpoint = 'https://{yourOktaDomain}/oauth2/default/v1/token';

// Replace these with actual values.
$oauth2->ClientId = 'OKTA_CLIENT_ID';
$oauth2->ClientSecret = 'OKTA_CLIENT_SECRET';

// Get the "refresh_token"
$oauth2->RefreshToken = $jsonToken->stringOf('refresh_token');

// Send the HTTP POST to refresh the access token..
$oauth2->VerboseLogging = 1;
$success = $oauth2->RefreshAccessToken();
if ($success != 1) {
    print $oauth2->LastErrorText . "\n";
    exit;
}

// Load the access token response into the json object 
$jsonToken->Load($oauth2->AccessTokenResponse);

// Save the new JSON access token response to a file.
// The access + refresh tokens contained in this JSON will be needed for the next refresh.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbJson = new COM("Chilkat.StringBuilder");
$jsonToken->EmitCompact = 0;
$jsonToken->EmitSb($sbJson);
$sbJson->WriteFile('qa_data/tokens/okta.json','utf-8',0);

print 'OAuth2 authorization granted!' . "\n";
print 'New Access Token = ' . $oauth2->AccessToken . "\n";

?>