Generates an RSS feed from a pile of other RSS feeds

Lifestream RSS Feed Generator

<?php header("Content-type: text/xml charset=utf-8");
    //get the simplepie library
    require_once('simplepie.inc');
    //grab the feeds
    $feed = new SimplePie();
    $feed->set_feed_url(array(
    	'http://feeds2.feedburner.com/Yostivanich',
		'http://twitter.com/statuses/user_timeline/7568942.rss',
		'http://feeds.delicious.com/v2/rss/jtyost2',
		'http://digg.com/users/jtyost2/history.rss',
		'http://ws.audioscrobbler.com/1.0/user/jtyost2/recenttracks.rss',
    ));
    //enable caching
    $feed->enable_cache(true);
    //provide the caching folder
    $feed->set_cache_location('cache');
    //set the amount of seconds you want to cache the feed
    $feed->set_cache_duration(1800);
    //init the process
    $feed->init();
    //let simplepie handle the content type (atom, RSS...)
    $feed->handle_content_type();
	//set number of items to be displayed
	$total_articles = 15;
	for ($x = 0; $x < $feed->get_item_quantity($total_articles); $x++)
	{
		$lifestream_items[] = $feed->get_item($x);
	}
$rssfeed = '<?xml version="1.0" encoding="utf-8"?>';
$rssfeed .= '<rss version="2.0">';
$rssfeed .= '<channel>';
$rssfeed .= '<title>Justin Yost - Personal Lifestream</title>';
$rssfeed .= '<link>http://lifestream.yostivanich.com</link>';
$rssfeed .= '<description>The personal lifestream of Justin Yost, displaying live updates of Justin\'s online life.</description>';
$rssfeed .= '<language>en-us</language>';
$rssfeed .= '<copyright>Creative Commons Attribution 3.0 Unported License: http://www.yostivanich.com/ Justin Yost </copyright>';
$rssfeed .= '<managingEditor>[email protected] (Justin Yost) </managingEditor>';
$rssfeed .= '<webMaster>[email protected] (Justin Yost) </webMaster>';
foreach ($lifestream_items as $item):
$feed = $item->get_feed();
$rssfeed .= '<item>';
$rssfeed .= '<title>' . $item->get_title() . '</title>';
$rssfeed .= '<description>' . $item->get_title() . '</description>';
$rssfeed .= '<link>' . $item->get_permalink() . '</link>';
$rssfeed .= '<pubDate>' . $item->get_date('r') . '</pubDate>';
$rssfeed .= '<guid isPermaLink="true">' . $item->get_permalink() . '</guid>';
$rssfeed .= '<category>' . $item->get_title() . '</category>';
$rssfeed .= '</item>';
endforeach;
$rssfeed .= '</channel>';
$rssfeed .= '</rss>';
echo $rssfeed;
?>