+ /**
+ * Fires before the trackback is added to a post.
+ *
+ * @since 4.7.0
+ *
+ * @param int $tb_id Post ID related to the trackback.
+ * @param string $tb_url Trackback URL.
+ * @param string $charset Character Set.
+ * @param string $title Trackback Title.
+ * @param string $excerpt Trackback Excerpt.
+ * @param string $blog_name Blog Name.
+ */
+ do_action( 'pre_trackback_post', $tb_id, $tb_url, $charset, $title, $excerpt, $blog_name );
+