1. Go to this page and download the library: Download szonov/dot-acl 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/ */
$acl->allow('user', '!admin.*'); // is the same as $acl->deny('user', 'admin.*')
$acl->deny('admin', '!admin.*'); // is the same as $acl->allow('admin', 'admin.*')