1. Go to this page and download the library: Download twosuperior/registry 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/ */
Registry::get('foo'); \\will return null if key does not exists
Registry::get('foo.bar'); \\will return null if key does not exists
Registry::get('foo', 'undefine') \\will return undefine if key does not exists