printXml

printXml.php

<?php

/**
 * Print some XML.
 * 
 * FIXME: This probably doesn't do a good job at prettifying whitespace when supplied with a DOMNode.
 * 
 * @author Craig Anderson <[email protected]>
 * @link https://gist.github.com/2934093
 */
function printXml($xml, $echo = true)
{
	if(is_string($xml))
	{
		$doc = new DOMDocument();
		$doc->preserveWhiteSpace = false; // need to do this before loading xml
		if(!$doc->loadXML($xml))
		{
			throw new InvalidArgumentException("String is not valid XML");
		}
		$xml = $doc;
	}
	if(!$xml instanceof DOMNode)
	{
		throw new InvalidArgumentException("Argument not recognised as XML");
	}
	$doc = $xml->ownerDocument;
	if(!$doc && $xml instanceof DOMDocument)
	{
		$doc = $xml;
	}
	$originalPreserveWhiteSpace = $doc->preserveWhiteSpace;
	$originalFormatOutput = $doc->formatOutput;
	$doc->preserveWhiteSpace = false;
	$doc->formatOutput = true;
	$result = sprintf("%s\n", $doc->saveXML($xml));
	if($echo) {
		echo $result;
	}
	$doc->preserveWhiteSpace = $originalPreserveWhiteSpace;
	$doc->formatOutput = $originalFormatOutput;
	return $result;
}