Ouzo\Controller::getRequestHeaders PHP 메소드

    public function getRequestHeaders()
    {
        $headers = Arrays::filterByKeys($_SERVER, Functions::startsWith('HTTP_'));
        return Arrays::mapKeys($headers, function ($key) {
            return str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($key, 5)))));
        });
    }