Example of book xml format data implemented by PHP based on DOM

The example of this article describes the book xml format data implemented by PHP based on DOM. Share it with everyone for your reference, the details are as follows:

<?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();
?>

The running results are as follows:

<?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>

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