<?php
include "parse.inc";
include "clean.inc";

function add_child($root, $data)
{
    $item = $root->createElement("item");

    foreach ($data as $k => $v) {
        $element = $root->createElement($k);
        $element->appendChild($root->createTextNode($v));
        $item->appendChild($element);
    }

    $root->documentElement->appendChild($item);
}

// Using Sax retrive the 1st entry from each rdf feed
// Since we do not intend to parse the entire file SAX is
// more effecient then DOM in this case.
$path = dirname(__FILE__);
$freshmeat = parse_xml_url("{$path}/fm-releases.rdf");
$slashdot = parse_xml_url("{$path}/slashdot.rdf");
$pear = parse_xml_url("{$path}/pear.rdf");

$data = array($freshmeat, $slashdot, $pear);

// now using the given rss data, make our own XML(RDF) feed.
$dom = new domDocument("1.0");

// create root element
$root = $dom->createElement("channel");
$dom->appendChild($root);

// append children (data from existing rss feeds);
foreach ($data as $v) {
    add_child($dom, $v);
}

// generate our own feed
$output = $dom->saveXML();

// make output presentable
echo clean($output);
?>
Output
freshmeat.net
freshmeat.net maintains the Web's largest index of Unix and cross-platform open source software. Thousands of applications are meticulously cataloged in the freshmeat.net database, and links to new code are added daily.
http://freshmeat.net/
Slashdot
News for nerds, stuff that matters
http://slashdot.org/
PEAR
This is a list containing the latest releases from PEAR.
http://pear.php.net/