//Does page URL match?
  if($_SERVER["REQUEST_URI"] == '/my_page_name')

  //Does page URL contain?
  if (strpos($_SERVER["REQUEST_URI"], '/my_page_') !== false)

Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.