Filters the admin post thumbnail HTML markup to return.

$content string

Admin post thumbnail HTML markup.

$post_id int

Post ID.

$thumbnail_id int|null

Thumbnail attachment ID, or null if there isn't one.

File: wp-admin/includes/post.php. View all references

return apply_filters( 'admin_post_thumbnail_html', $content, $post->ID, $thumbnail_id );