Reply To: Previous and next get fileds

• John Huebner

• May 5, 2017 at 7:54 am

gonna be honest, not sure what you’re doing there, so here’s another stab code to explain what I was doing.

add_action('acf/save_post', 'my_acf_save_post', 1);
function my_acf_save_post($post_id) {
  
  // you need the field key of the field you want to check
  $field_to_check_key = 'field_585d2d2af8d69';
  
  // see if this field is set
  if (isset($_POST['acf'][$field_to_check_key])) {
    // this field is not submitted, must be a different group
    return;
  }
  
  // the new value is submitted
  $new_value = $_POST['acf'][$field_to_check_key];
  
  // get the old value
  $old_value = get_field('luc_nham_0_can', $post_id, false);
  
  // test new value to see if it's different than old value
  if ($new_value != $old_value) {
    // it is different
    // do something
  }
}