1. Go to this page and download the library: Download techsterx/slim-config-yaml 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/ */
techsterx / slim-config-yaml example snippets
re 'Yaml.php';
$app = new \Slim\Slim();
\BurningDiode\Slim\Config\Yaml::getInstance()->addFile('/path/to/some/file');