Iqiyi::rolling_curl PHP Method

    private static function rolling_curl($urls, $proxy = '')
    {
        $queue = curl_multi_init();
        $map = $responses = array();
        foreach ($urls as $url) {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            if ($proxy) {
                curl_setopt($ch, CURLOPT_PROXY, $proxy);
            }
            curl_setopt($ch, CURLOPT_TIMEOUT, 10);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_setopt($ch, CURLOPT_USERAGENT, self::USER_AGENT);
            curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
            curl_multi_add_handle($queue, $ch);
            $map[(string) $ch] = $url;
        }
        do {
            while (($code = curl_multi_exec($queue, $active)) == CURLM_CALL_MULTI_PERFORM) {
            }
            if ($code != CURLM_OK) {
                break;
            }
            while ($done = curl_multi_info_read($queue)) {
                $data = curl_multi_getcontent($done['handle']);
                preg_match('#"l":"([^"]+)&src=.*?"#i', $data, $matchs);
                $results = $matchs ? $matchs[1] : '';
                $responses[$map[(string) $done['handle']]] = $results;
                curl_multi_remove_handle($queue, $done['handle']);
                curl_close($done['handle']);
            }
            if ($active > 0) {
                curl_multi_select($queue, 0.5);
            }
        } while ($active);
        curl_multi_close($queue);
        return $responses;
    }