1. Go to this page and download the library: Download sylius/search-bundle 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/ */
$finder = $this->get('sylius_search.finder')
->setTargetIndex('product') // target index searches in a specific type, if it's not set it searches in all types
->setFacetGroup('search_set') // configuration based, uses the relevant facet set, if not set it does not show facets
->find(new SearchStringQuery(...));