1. Go to this page and download the library: Download graze/config-validation 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/ */
graze / config-validation example snippets
use Respect\Validation\Validator as v;
$validator = (new ArrayValidator())
->:stringType()->date());