Prado\Web\THttpRequest::getHeaders PHP Method

    public function getHeaders($case = null)
    {
        static $result;
        if ($result === null && function_exists('apache_request_headers')) {
            $result = apache_request_headers();
        } elseif ($result === null) {
            $result = array();
            foreach ($_SERVER as $key => $value) {
                if (strncasecmp($key, 'HTTP_', 5) !== 0) {
                    continue;
                }
                $key = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($key, 5)))));
                $result[$key] = $value;
            }
        }
        if ($case !== null) {
            return array_change_key_case($result, $case);
        }
        return $result;
    }