admin_post_thumbnail_size хук-фильтр . WP 4.4.0

Filters the size used to display the post thumbnail image in the 'Featured image' meta box.

Note: When a theme adds 'post-thumbnail' support, a special 'post-thumbnail' image size is registered, which differs from the 'thumbnail' image size managed via the Settings > Media screen.

Использование

add_filter( 'admin_post_thumbnail_size', 'filter_function_name_8975', 10, 3 );
function filter_function_name_8975( $size, $thumbnail_id, $post ){
	// filter...

	return $size;
}

$size(строка|int[])

Requested image size. Can be any registered image size name, or an array of width and height values in pixels (in that order).

$thumbnail_id(int)

Post thumbnail attachment ID.

$post(WP_Post)

The post object associated with the thumbnail.

Список изменений

Где вызывается хук

$size = apply_filters( 'admin_post_thumbnail_size', $size, $thumbnail_id, $post );

Где используется хук в ядре WordPress