SyndicatedPost::comment_feed PHP Méthode

    function comment_feed()
    {
        $feed = null;
        // Well Formed Web comment feeds extension for RSS 2.0
        // <http://www.sellsbrothers.com/spout/default.aspx?content=archive.htm#exposingRssComments>
        //
        // N.B.: Correct capitalization is wfw:commentRss, but
        // wfw:commentRSS is common in the wild (partly due to a typo in
        // the original spec). In any case, our item array is normalized
        // to all lowercase anyways.
        if (isset($this->item['wfw']['commentrss'])) {
            $feed = $this->item['wfw']['commentrss'];
        }
        // In Atom 1.0, the convention is to use a standard link element
        // with @rel="replies". Sometimes this is also used to pass a
        // link to the human-readable comments page, so we also need to
        // check link/@type for a feed MIME type.
        //
        // Which is why I'm not using the SimplePie_Item::get_links()
        // method here, incidentally: it doesn't allow you to filter by
        // @type. *sigh*
        if (isset($this->item['link_replies'])) {
            // There may be multiple <link rel="replies"> elements; feeds have a feed MIME type
            $N = isset($this->item['link_replies#']) ? $this->item['link_replies#'] : 1;
            for ($i = 1; $i <= $N; $i++) {
                $currentElement = 'link_replies' . ($i > 1 ? '#' . $i : '');
                if (isset($this->item[$currentElement . '@type']) and preg_match("application/(atom|rss|rdf)\\+xmli", $this->item[$currentElement . '@type'])) {
                    $feed = $this->item[$currentElement];
                }
            }
        }
        return $feed;
    }