Drupal 8. Get all multisites names

drupal8-get-multisites-list.php

<?php
    $multisites = [];
    
    if (is_file(DRUPAL_ROOT . '/sites/sites.php')) {
        
            include DRUPAL_ROOT . '/sites/sites.php';
            
            $multisites = array_keys($sites);
            
            $multisites[] = 'default';
    }