How to use the SimplePie RSS library to display a list of linked article headlines from a Wordpress RSS feed on a non-Wordpress PHP page.

wordpress-headlines.php

<?php
/** Outputs a list of linked article headlines from a Wordpress recent posts RSS feed. */

$simplepie_path = "includes/simplepie/"; // path to SimplePie RSS library
$feed_url = 'http://yourblog.com/feed/'; // url of your blog's RSS feed
$cache_location = $_SERVER['DOCUMENT_ROOT'] . '/includes/simplepie-cache'; // set cache directory (make sure that the directory exists and that this script can write to it)
$max_items = 3; // max feed items to show
$first_item = 0; // feed item to start from

require_once($simplepie_path.'autoloader.php');
$feed = new SimplePie();
$feed->set_feed_url($feed_url);
$feed->set_cache_location($cache_location);
$feed->init();
$feed->handle_content_type();

if($feed->error()):
  // something went wrong
  echo $feed->error();
else:
  // output list of feed items
  echo '<ul>'."\n";
  foreach ($feed->get_items($first_item, $max_items) as $item):
    echo '  <li><a href="'.$item->get_permalink().'">'.$item->get_title().'</a></li>'."\n";
  endforeach;
  echo '</ul>'."\n";
endif;
?>