#load an XML document into the DOM
$dom = new DomDocument();
$dom -> load("books.xml");
$title = $dom -> createElement("title");
#create text nodes
$topictext = $dom -> createTextNode("Linux");
#append the text nodes to the inner nested elements
$topic -> appendChild($topictext);
#append the inner nested elements to the element<br/>$title -> appendChild($topic);<br/>#append the <title> element to the root element<br/>$dom -> documentElement -> appendChild($title);<br/>#create a new enlarged xml document<br/>$dom -> save("newbooks.xml");<br/>?>
</code>
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