Где ошибка в коде?

$curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, 'https://ru.sitename.com/');
        curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36');
        curl_setopt($curl, CURLOPT_COOKIEJAR, "cookies.txt");
        curl_setopt($curl, CURLOPT_COOKIEFILE, "cookies.txt");
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); 
        $out = curl_exec($curl);
        curl_close($curl);