Extending DOM Classes Examples II

  $dom = new books();
  $dom->load("book.xml");
  $dom->addBook("PHP de Luxe", "Richard Samar, Christian Stocker");
  print $dom->saveXML();

  <books>  
    <book>
      <title>PHP de Luxe</title>
      <author>Richard Samar, Christian Stocker</author>
    </book>
  </books>