Add Post Class if Post has thumbnail

Code:

<?php // add class if post has thumbnail function has_thumb_class($classes) { global $post; if( has_post_thumbnail($post->ID) ) { $classes[] = 'has_thumb'; } return $classes; } add_filter('post_class', 'has_thumb_class'); ?>

Instructions:

Add this snippet to your functions.php file to add a post class to any post that uses a featured image.

Related links:

http://codex.wordpress.org/Post_Thumbnails