SyndicatedPost::comment_link PHP Méthode

    function comment_link()
    {
        $url = null;
        // RSS 2.0 has a standard <comments> element:
        // "<comments> is an optional sub-element of <item>. If present,
        // it is the url of the comments page for the item."
        // <http://cyber.law.harvard.edu/rss/rss.html#ltcommentsgtSubelementOfLtitemgt>
        if (isset($this->item['comments'])) {
            $url = $this->item['comments'];
        }
        // The convention in Atom feeds is to use a standard <link>
        // element with @rel="replies" and @type="text/html".
        // Unfortunately, SimplePie_Item::get_links() allows us to filter
        // by the value of @rel, but not by the value of @type. *sigh*
        // Try Atom 1.0 first
        $linkElements = $this->entry->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'link');
        // Fall back and try Atom 0.3
        if (is_null($linkElements)) {
            $linkElements = $this->entry->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_03, 'link');
        }
        // Now loop through the elements, screening by @rel and @type
        if (is_array($linkElements)) {
            foreach ($linkElements as $link) {
                $rel = isset($link['attribs']['']['rel']) ? $link['attribs']['']['rel'] : 'alternate';
                $type = isset($link['attribs']['']['type']) ? $link['attribs']['']['type'] : NULL;
                $href = isset($link['attribs']['']['href']) ? $link['attribs']['']['href'] : NULL;
                if (strtolower($rel) == 'replies' and $type == 'text/html' and !is_null($href)) {
                    $url = $href;
                }
            }
        }
        return $url;
    }