title: Can someone explain me PHP Iterator?
body: <p>I was trying to get an overview and understand PHP Iterator through the examples on this official page. Can someone explain it to me? As to what is it used for and how are the results computed as shown on the page.</p>
  
  <p>The link to PHP Iterator: <a href="http://php.net/manual/en/class.iterator.php" rel="nofollow">http://php.net/manual/en/class.iterator.php</a></p>