PHP How to use quot; entities in XML with DOMdocument

I am working on modifying the contents of an XML file generated by some other library. I'm making some DOM modifications with PHP (5.3.10) and reinserting a replacement node.

The XML data I'm working with has &quot; elements before I do the manipulation and I want to keep those elements as per http://ift.tt/RiStca when I'm done with the modifications.

However I'm having problems with PHP changing the " elements. See my example.

$temp = 'Hello "XML".';
$doc = new DOMDocument('1.0', 'utf-8');
$newelement = $doc->createElement('description', $temp);
$doc->appendChild($newelement);
echo $doc->saveXML() . PHP_EOL; // shows " instead of element
$node = $doc->getElementsByTagName('description')->item(0);
echo $node->nodeValue . PHP_EOL; // also shows "

Output

<?xml version="1.0" encoding="utf-8"?> 
<description>Hello "XML".</description>

Hello "XML".

Is this a PHP error or am I doing something wrong? I hope it isn't necessary to use createEntityReference in every char location.

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