Home › Forums › General Issues › Action to check if specific field value changed on post update? › Reply To: Action to check if specific field value changed on post update?
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;
}
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