PHP script to automatically convert sitemap.xml to well formatted

<?php

// Load sitemap.xml
$xml = simplexml_load_file("sitemap.xml");

// Create a new XML document
$newXml = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8"?><urlset></urlset>');

// Loop through each sitemap entry
foreach ($xml->url as $url) {

  // Create a new URL node
  $newUrl = $newXml->addChild('url');

  // Copy each sub-node
  foreach ($url->children() as $child) {
    $newUrl->addChild($child->getName(), (string) $child);
  }
}

// Save the new XML document to sitemap-formatted.xml
$newXml->asXML('sitemap-formatted.xml');

?>