Occasionally you may need to display featured images in sizes other than WordPress’ default thumbnail, medium and large sizes. That’s quite easily solved with the add_image_size() and the_post_thumbnail() functions. Unfortunately, there are still 2 problems to be solved:

• Some posts may not have images at all, or the author forgets to attach a featured image
• Previous posts don’t have featured images

Here’s a solution that 1) resizes the featured image to the right size, 2) uses the first image in the post if a featured image is not set and 3) falls back to a default image if none of the above are true. Continue Reading