Locator::extension( string[] $array ): SimplePie\array<Response>|null

387    public function extension(array &$array)388    {389        foreach ($array as $key => $value) {390            if ($this->checked_feeds === $this->max_checked_feeds) {391                break;392            }393            $extension = strrchr($value, '.');394            if ($extension !== false && in_array(strtolower($extension), ['.rss', '.rdf', '.atom', '.xml'])) {395                $this->checked_feeds++;396 397                $headers = [398                    'Accept' => SimplePie::DEFAULT_HTTP_ACCEPT_HEADER,399                ];400 401                try {402                    $feed = $this->get_http_client()->request(Client::METHOD_GET, $value, $headers);403 404                    if ((!Misc::is_remote_uri($feed->get_final_requested_uri()) || ($feed->get_status_code() === 200 || $feed->get_status_code() > 206 && $feed->get_status_code() < 300)) && $this->is_feed($feed)) {405                        return [$feed];406                    }407                } catch (ClientException $th) {408                    // Just unset and continue.409                }410 411                unset($array[$key]);412            }413        }414        return null;415    }