Piwik\ProxyHttp::compressFile PHP Метод

    private static function compressFile($fileToCompress, $compressedFilePath, $compressionEncoding, $byteStart, $byteEnd)
    {
        $data = file_get_contents($fileToCompress);
        $data = substr($data, $byteStart, $byteEnd - $byteStart);
        if ($compressionEncoding == 'deflate') {
            $data = gzdeflate($data, 9);
        } elseif ($compressionEncoding == 'gzip' || $compressionEncoding == 'x-gzip') {
            $data = gzencode($data, 9);
        }
        file_put_contents($compressedFilePath, $data);
    }