1. Go to this page and download the library: Download wazaari/barcodes 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/ */
wazaari / barcodes example snippets
$generator = new BarcodeGenerator();
$barcode = generator.generate(BarcodeType::QR_CODE, "This is what I want encoded");