Reply To: Action to check if specific field value changed on post update?

• John Huebner

• September 10, 2016 at 8:58 am

If you use and acf/update_value/ filter then the old value is still in the database and the new value is passed to the filter. You can use get_post_meta() to get the old value and compare it to the new value. I’m not sure you can use get_field() here because accessing a field while it’s being saved may have side effects, but you could try it.

add_filter('acf/update_value/name=my_field_name', 'my_check_for_change', 10, 3);
function my_check_for_change($value, $post_id, $field) {
  $old_value = get_post_meta($post_id, $field['name'], true);
  if ($old_value != $value) {
    // it changed
  }
  return $value;
}