1. Go to this page and download the library: Download verotel/flexpay-php-client 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/ */
verotel / flexpay-php-client example snippets
// get your brand instance
$brand = Verotel\FlexPay\Brand::create_from_merchant_id(/* Your customer ID */ '9804000000000000');
$flexpayClient = new Verotel\FlexPay\Client(/* shop ID */ 12345, "FlexPay Signature Key", $brand);