default.php

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<?php
// Set title
if (empty($vars['title'])) {
    $title = elgg_get_config('sitename');
} else {
    $title = elgg_get_config('sitename') . ": " . $vars['title'];
}

// Remove RSS from URL
$rssurl = current_page_url();
$url = elgg_http_remove_url_query_element($rssurl, 'view');

$rssurl = htmlspecialchars($url, ENT_NOQUOTES, 'UTF-8');
$url = htmlspecialchars($url, ENT_NOQUOTES, 'UTF-8');

$body = elgg_extract('body', $vars, '');
$description = elgg_extract('description', $vars, '');

$namespaces = elgg_view('extensions/xmlns');
$extensions = elgg_view('extensions/channel');


// allow caching as required by stupid MS products for https feeds.
header('Pragma: public', true);
header("Content-Type: text/xml");

echo "<?xml version='1.0'?>";
echo <<<END
<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:georss="http://www.georss.org/georss" xmlns:atom="http://www.w3.org/2005/Atom" $namespaces>
<channel>
    <title><![CDATA[$title]]></title>
    <link>$url</link>
    <atom:link href="$rssurl" rel="self" type="application/rss+xml" />
    <description><![CDATA[$description]]></description>
    $extensions
    $body
</channel>
</rss>
END;