Illuminate\Routing\UrlGenerator::replaceNamedParameters PHP Method

    protected function replaceNamedParameters($path, &$parameters)
    {
        return preg_replace_callback('/\\{(.*?)\\??\\}/', function ($m) use(&$parameters) {
            return isset($parameters[$m[1]]) ? Arr::pull($parameters, $m[1]) : $m[0];
        }, $path);
    }