require_once __DIR__ . '/db.php';
        $blacklist = ZwsDatabaseAdmin::get_blacklist();
        $blacklist_string = '';
        if (!empty($blacklist)) {
            foreach ($blacklist as $phrase) {
                $blacklist_string .= $phrase->banned . ', ';
            }
            $blacklist_string = rtrim($blacklist_string);
            $blacklist_string = rtrim($blacklist_string, ',');
        } else {
            $blacklist_string = 'No blacklist is set!';
        }
        return $blacklist_string;
    }
    public static function update_db()
    {
        $blacklist_string = sanitize_text_field($_POST['updated_blacklist']);
        // remove trailing whitespace
        $blacklist_string = rtrim($blacklist_string);
        // remove trailing commas
        $blacklist_string = rtrim($blacklist_string, ',');
        // split string into array of values
        $blacklist = explode(', ', $blacklist_string);
        // add to database
        require_once __DIR__ . '/db.php';
        ZwsDatabaseAdmin::set_blacklist($blacklist);
    }
}
if (isset($_POST['updated_blacklist'])) {
    ZwsAdminPage::update_db();
}
 public static function run_admin()
 {
     require_once __DIR__ . '/admin.php';
     // run the menu page code
     ZwsAdminPage::my_setup_menu();
 }