Example of book xml format data implemented by php based on dom_php skills

<?php
 $books = array();
 $books [] = array(
 &#39;title&#39; => &#39;PHP Hacks&#39;,
 &#39;author&#39; => &#39;Jack Herrington&#39;,
 &#39;publisher&#39; => "O&#39;Reilly"
 );
 $books [] = array(
 &#39;title&#39; => &#39;Podcasting Hacks&#39;,
 &#39;author&#39; => &#39;Jack Herrington&#39;,
 &#39;publisher&#39; => "O&#39;Reilly"
 );
 $doc = new DOMDocument();
 $doc->formatOutput = true;
 $r = $doc->createElement( "books" );
 $doc->appendChild( $r );
 foreach( $books as $book )
 {
 $b = $doc->createElement( "book" );
 $author = $doc->createElement( "author" );
 $author->appendChild(
 $doc->createTextNode( $book[&#39;author&#39;] )
 );
 $b->appendChild( $author );
 $title = $doc->createElement( "title" );
 $title->appendChild(
 $doc->createTextNode( $book[&#39;title&#39;] )
 );
 $b->appendChild( $title );
 $publisher = $doc->createElement( "publisher" );
 $publisher->appendChild(
 $doc->createTextNode( $book[&#39;publisher&#39;] )
 );
 $b->appendChild( $publisher );
 $r->appendChild( $b );
 }
 echo $doc->saveXML();
?>

<?xml version="1.0"?>
<books>
 <book>
  <author>Jack Herrington</author>
  <title>PHP Hacks</title>
  <publisher>O&#39;Reilly</publisher>
 </book>
 <book>
  <author>Jack Herrington</author>
  <title>Podcasting Hacks</title>
  <publisher>O&#39;Reilly</publisher>
 </book>
</books>