Агрегатор rss'очек :-)

rss_agregate.php

<?php

// Агрегатор rss'очек :-) 

$script_url = '[ Вставьте сюда url к этому скрипту ]';
$result_title = '[ Вставьте сюда title выходной rss ]';

$links = array(
    'http://downloads.bbc.co.uk/podcasts/worldservice/bureve/rss.xml',
    'http://downloads.bbc.co.uk/podcasts/worldservice/5floor/rss.xml',
    'http://downloads.bbc.co.uk/podcasts/worldservice/globalnews/rss.xml',
    'http://downloads.bbc.co.uk/podcasts/worldservice/newshour/rss.xml',
    'http://downloads.bbc.co.uk/podcasts/radio4/fooc/rss.xml',
    'http://downloads.bbc.co.uk/podcasts/worldservice/bizdaily/rss.xml'
);

$summary = '';
$items = array();

foreach($links as $link) {
    $text = file_get_contents($link);
    $xml = simplexml_load_string($text);
    $description = $xml->children('channel')->xpath('//description');
    $summary .= (string) $description[0] . "\n";
    foreach($xml->children('channel')->xpath('//item') as $item) {
        $obj = null;
        normalize_simple_xml($item, $obj);
        $items[strtotime($obj['pubDate'])] = $obj;
    }
}

$summary = trim($summary);
krsort($items);

$str = implode('', array_map(function($v) {
    $url = $v['enclosure']['url'];
    $length = $v['enclosure']['length'];
    $type = $v['enclosure']['type'];
    return "<item>"
            . "<title>{$v['title']}</title>"
            . "<description>{$v['description']}</description>"
            . "<pubDate>{$v['pubDate']}</pubDate>"
            . "<enclosure url=\"{$url}\" length=\"{$length}\" type=\"{$type}\"/>"
            . "<guid isPermaLink=\"false\">{$url}</guid>"
            . "<link>{$url}</link>"
            . "<media:content url=\"{$url}\" fileSize=\"{$length}\" type=\"{$type}\" medium=\"audio\" expression=\"full\" duration=\"\"/>"
            . "</item>";
}, $items));

$xml = <<<XML
<rss xmlns:media="http://search.yahoo.com/mrss/" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:ppg="http://bbc.co.uk/2009/01/ppgRss" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
<channel>
<title>{$result_title}</title>
<link>{$script_url}</link>
<description>
{$summary}
</description>
<language>en-gb</language>
<atom:link href="{$script_url}" rel="self" type="application/rss+xml"/>
{$str}
</channel>
</rss>
XML;

print($xml);

function normalize_simple_xml($obj, &$result) {
    $data = $obj;
    if (is_object($data)) {
        $data = get_object_vars($data);
    }
    if (is_array($data)) {
        foreach ($data as $key => $value) {
            $res = null;
            normalize_simple_xml($value, $res);
            if (($key == '@attributes') && ($key)) {
                $result = $res;
            } else {
                $result[$key] = $res;
            }
        }
    } else {
        $result = $data;
    }
}