Insert custom content into feed
// add custom feed content
function add_feed_content($content) {
if(is_feed()) {
$content .= '<p>This article is copyright © '.date('Y').' '.bloginfo('name').'</p>';
}
return $content;
}
add_filter('the_excerpt_rss', 'add_feed_content');
add_filter('the_content', 'add_feed_content');