Http::get_header_info PHP Метод

    public static function get_header_info($header = '', $echo = true)
    {
        ob_start();
        $headers = getallheaders();
        if (!empty($header)) {
            $info = $headers[$header];
            echo $header . ':' . $info . "\n";
        } else {
            foreach ($headers as $key => $val) {
                echo "{$key}:{$val}\n";
            }
        }
        $output = ob_get_clean();
        if ($echo) {
            echo nl2br($output);
        } else {
            return $output;
        }
    }