(PHP Extension) 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 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.

// 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).

$jsonToken = new CkJsonObject();
$success = $jsonToken->LoadFile('qa_data/tokens/okta.json');
if ($success != true) {
    print 'Failed to load myob.json' . "\n";
    exit;
}

$oauth2 = new CkOAuth2();

$oauth2->put_TokenEndpoint('https://{yourOktaDomain}/oauth2/default/v1/token');

// Replace these with actual values.
$oauth2->put_ClientId('OKTA_CLIENT_ID');
$oauth2->put_ClientSecret('OKTA_CLIENT_SECRET');

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

// Send the HTTP POST to refresh the access token..
$oauth2->put_VerboseLogging(true);
$success = $oauth2->RefreshAccessToken();
if ($success != true) {
    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.
$sbJson = new CkStringBuilder();
$jsonToken->put_EmitCompact(false);
$jsonToken->EmitSb($sbJson);
$sbJson->WriteFile('qa_data/tokens/okta.json','utf-8',false);

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

?>