de/en-code


  
      function encode_url(url)
      {
          url =  str_rot13(urlencode(preg_replace('#^([\w+.-]+)://#i', "$1/", url)));
          return url;
      }
  
      function decode_url(url)
      {
          url = preg_replace('#^([\w+.-]+)/#i', "$1://", urldecode(str_rot13(url)));
          return url;
      }