7314*7315* @since 2.1.07316*7317* @param string$thumbnail_urlURLfor the attachment thumbnail.7318* @param int$post_id Attachment ID.7319*/7320returnapply_filters('wp_get_attachment_thumb_url',$thumbnail_url,$post_id);7321}73227323/**7324* Verifies an attachment is of a given type.7325*7326* @since 4.2.0
History
Introduced in 2.1.0. Unchanged from 6.7.7 through 7.1.0.