How to check for empty lines and not write to the database?

Question

WordPress

There are metaboxes for writing to WordPress, how to check for empty lines and not write to the database if there is no data? I suppose through empty, but there is not enough knowledge.

Answer 1

// Обновляем данные в базе
if ( !empty( $my_data ) ) {
  update_post_meta( $post_id, 'my_meta_key', $my_data );
}