constructor


  
      function PHProxy(flags = 'previous')
      {
          this->version = '0.2';
          this->script_url = 'http' 
                            . (isset(_SERVER['HTTPS']) && _SERVER['HTTPS'] == 'on' ? 's' : '')
                            . "://{_SERVER['HTTP_HOST']}{_SERVER['PHP_SELF']}";
          this->set_flags(flags);
      }