1. Go to this page and download the library: Download nirgendswo/valitron 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/ */
nirgendswo / valitron example snippets
$validator = new Valitron\Validator(['name' => 'Chester Tester']);
$validator->setDefault('birthday', '10-01-2015');