const

        /**
        * Determine if the URL contains a domain.
        * $domains  : list of domains (an array or a string separated by semicolons)
        * $remove   : list of subdomains to remove (or TRUE/FALSE to remove all/none)
        */
        function match_domain($url, $domains)
        {
            $url = $this->extract_host($url);
            $url = utf8_case_fold_nfc($url);
            $url_split = array_reverse(explode('.', $url));

            $domain_list = is_string($domains) ? explode(';', $domains) : $domains;
            foreach ($domain_list as $domain)
            {
                $domain = $this->extract_host($domain);
                $domain = utf8_case_fold_nfc($domain);

                // Ignoring all subdomains, so check if our URL ends with domain
                if (substr($url, -strlen($domain)) == $domain)
                {
                    return true;
                }
                $domain_split = array_reverse(explode('.', $domain));
                $match_count = 0;
                $match_list = array();
                foreach ($domain_split as $index => $segment)
                {
                    if (isset($url_split[$index]) && strcmp($url_split[$index], $segment) === 0)
                    {
                        $match_count += 1;
                        array_splice($match_list, 0, 0, $segment);
                        continue;
                    }
                    break;
                }
                if ($match_count > 2 || ($match_count == 2 && strlen($match_list[0]) > 2)) // not the best check, but catches domains like 'co.jp'



                {
                    return true;
                }
            }
            return false;
        }