code: public function selectAsPairs($url)
      {
          $pairs = array();
          foreach ($this->cookies as $cookie) {
              if ($this->isMatch($cookie, $url->getHost(), $url->getPath(), $cookie->getName())) {
                  $pairs[] = $cookie->getName() . '=' . $cookie->getValue();
              }
          }
  
          return $pairs;
      }
docs: Uses a URL to sift relevant cookies by host and path.
  Results are list of strings of form "name=value".
  
  @param SimpleUrl $url Url to select by.
  
  @return array Valid name and value pairs.