Display Post Thumbnails in RSS Feed

Enhance your RSS feed by including post thumbnails.

PHP

function show_feed_post_thumbnail($content) {
global $post;
if(has_post_thumbnail($post->ID)) {
$content = '' . $content;
}
return $content;
}
add_filter('the_excerpt_rss', 'show_feed_post_thumbnail');
add_filter('the_content_feed', 'show_feed_post_thumbnail');