Video streamer from remote server by HTTP on PHP (Yii2)

gistfile1.txt

    /**
     * @param $url
     */
    public function actionStreamVideoFromCdn($url)
    {
        $headersCollection = Yii::$app->request->getHeaders();
        $responseHeaders = [];

        $chInfo = curl_init();
        curl_setopt($chInfo, CURLOPT_URL, $url);
        curl_setopt($chInfo, CURLOPT_NOBODY, 1);
        curl_setopt($chInfo, CURLOPT_CONNECTTIMEOUT, 0);
        curl_setopt($chInfo, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($chInfo, CURLOPT_AUTOREFERER, 1);

        if (null !== $headersCollection->get('range')) {
            [$param, $range] = explode('=', $headersCollection->get('range'));

            curl_setopt($chInfo, CURLOPT_RANGE, $range);
        }

        curl_setopt(
            $chInfo,
            CURLOPT_HEADERFUNCTION,
            function ($curl, $header) use (&$responseHeaders) {
                $len = \strlen($header);

                $header = \explode(':', $header, 2);
                if (\count($header) < 2) { // ignore invalid headers
                    return $len;
                }

                $name = \strtolower(\trim($header[0]));
                $responseHeaders[$name] = \trim($header[1]);

                return $len;
            }
        );

        curl_exec($chInfo);
        curl_close($chInfo);

        header('Accept-Ranges: bytes');
        header('Content-Type: ' . $responseHeaders['content-type']);
        header('Content-Length: ' . $responseHeaders['content-length']);

        if (isset($responseHeaders['content-range'])) {
            header('HTTP/1.1 206 Partial Content');
            header('Content-Range: ' . $responseHeaders['content-range']);
        }

        $chStream = curl_init();
        curl_setopt($chStream, CURLOPT_URL, $url);
        curl_setopt($chStream, CURLOPT_CONNECTTIMEOUT, 0);
        curl_setopt($chStream, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($chStream, CURLOPT_AUTOREFERER, 1);

        if (null !== $headersCollection->get('range')) {
            [$param, $range] = explode('=', $headersCollection->get('range'));

            curl_setopt($chStream, CURLOPT_RANGE, $range);
        }

        curl_exec($chStream);
        curl_close($chStream);
    }