1. Go to this page and download the library: Download saundefined/tinkoff library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
saundefined / tinkoff example snippets
$client = new Tinkoff\Business\OAuth\Client('client_id', 'client_secret', 'refresh_token');
$access_token = $client->renew()->getAccessToken();