1. Go to this page and download the library: Download symplify/vendor-patches 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/ */
symplify / vendor-patches example snippets
bash
vendor/nette/di/src/DI/Extensions/InjectExtension.php
# copy of the file
vendor/nette/di/src/DI/Extensions/InjectExtension.php.old