PhpBrew\Downloader\PhpStreamDownloader::hasSupport PHP Метод

    public function hasSupport($requireSsl)
    {
        if (!function_exists('file_get_contents')) {
            return false;
        }
        $wrappers = stream_get_wrappers();
        if ($requireSsl) {
            return in_array('https', $wrappers);
        }
        return in_array('http', $wrappers);
    }