1. Go to this page and download the library: Download jp-system/validator-docs 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/ */
jp-system / validator-docs example snippets
'docs' => [
'cpf' => 'Este campo deve ser um CPF válido.',
...
],