script.php

<?php
  $urls = array();
  $DomDocument = new DOMDocument();
  $DomDocument->load('sitemap.xml');
  $DomNodeList = $DomDocument->getElementsByTagName('loc');

  foreach($DomNodeList as $url) {
    echo $url->nodeValue;
    $headers = get_headers($url->nodeValue);
    $code = $headers[0];
    echo  $code;
    echo "<br />";
  }
?>