DOMParser::onFulfilled PHP Method

        public function onFulfilled(Promisable $promised)
        {
            $dom = new DOMDocument();
            if (@$dom->loadHTML($promised->getData())) {
                $xpath = new DOMXPath($dom);
                foreach ($xpath->query("//p[@class='para rdfs-comment']") as $found) {
                    $promised->setDescription($found->textContent);
                    break;
                }
            } else {
                throw new \RuntimeException("failed to load HTML at {$promised->url}");
            }
        }