code: protected function chompCoordinates(&$url)
      {
          if (preg_match('/(.*)\?(\d+),(\d+)$/', $url, $matches)) {
              $url = $matches[1];
  
              return array((integer) $matches[2], (integer) $matches[3]);
          }
  
          return array(false, false);
      }
docs: Extracts the X, Y coordinate pair from an image map.
  
  @param string $url   URL so far. The coordinates will be removed.
  
  @return array        X, Y as a pair of integers.