Set first image as featured image
grabs the first image in your body content and sets it as the post’s featured image.
/** * Snippet Name: Set first image as featured image * Snippet URL: https://wpcustoms.net/snippets/set-first-image-featured-image/ */ function set_featured_image_from_attachment($content) { global $post; if (has_post_thumbnail()) { // display the featured image $content = the_post_thumbnail() . $content; } else { // get & set the featured image $attachments = get_children(array( 'post_parent' => $post->ID, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order' )); if ($attachments) { foreach ($attachments as $attachment) { set_post_thumbnail($post->ID, $attachment->ID); break; } // display the featured image $content = the_post_thumbnail() . $content; } } return $content; } add_filter('the_content', 'set_featured_image_from_attachment');