Curl\Curl::download PHP Method

    public function download($url, $mixed_filename)
    {
        if (is_callable($mixed_filename)) {
            $this->downloadCompleteFunction = $mixed_filename;
            $fh = tmpfile();
        } else {
            $filename = $mixed_filename;
            // Use a temporary file when downloading. Not using a temporary file can cause an error when an existing
            // file has already fully completed downloading and a new download is started with the same destination save
            // path. The download request will include header "Range: bytes=$filesize-" which is syntactically valid,
            // but unsatisfiable.
            $download_filename = $filename . '.pccdownload';
            $mode = 'wb';
            // Attempt to resume download only when a temporary download file exists and is not empty.
            if (file_exists($download_filename) && ($filesize = filesize($download_filename))) {
                $mode = 'ab';
                $first_byte_position = $filesize;
                $range = $first_byte_position . '-';
                $this->setOpt(CURLOPT_RANGE, $range);
            }
            $fh = fopen($download_filename, $mode);
            // Move the downloaded temporary file to the destination save path.
            $this->downloadCompleteFunction = function ($fh) use($download_filename, $filename) {
                rename($download_filename, $filename);
            };
        }
        $this->setOpt(CURLOPT_FILE, $fh);
        $this->get($url);
        $this->downloadComplete($fh);
        return !$this->error;
    }

 /**
  * Create user cache.
  *
  * @param string $user Twitter screen name
  * @return bool If successful true
  * @throws CacheException Any errors
  */
 public function create($user)
 {
     try {
         $path = config("cache.path") . "/{$user}";
         $json_file = "{$path}/data.json";
         if (!$this->exists($user)) {
             mkdir($path);
         }
         if (!file_exists($json_file)) {
             touch($json_file);
         }
         $response = $this->twistOAuth->get("users/show", ["id" => $user]);
         $image_url = str_replace("_normal", "", $response->profile_image_url_https);
         $info = new SplFileInfo($image_url);
         $curl = new Curl();
         $curl->setUserAgent(SaveTweet::APP_NAME . "/" . SaveTweet::APP_VERSION . " with PHP/" . PHP_VERSION);
         $curl->download($image_url, "{$path}/icon.{$info->getExtension()}");
         $curl->close();
         $data = ["name" => $response->name, "screen_name" => $response->screen_name, "id" => $response->id_str, "icon" => config("cache.http_path") . "/{$response->id_str}/icon.{$info->getExtension()}", "org_icon" => $image_url, "update_at" => time()];
         $json = json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
         (new SplFileObject($json_file, "w"))->fwrite($json);
         return true;
     } catch (RuntimeException $e) {
         $this->_catch($e);
     }
 }