Reply To: acf_form() – action when repeater row added or updated

• John Huebner

• February 6, 2023 at 2:14 pm

You are going to have to compare each row in the old value stored in the repeater against the new input row.

Unfortunately I do not know the indexes used for new rows on the input, when acf repeaters are submitted the input for a sub field is

$_POST['acf']['field_XXXXX'][$index]['field_YYYYY']

I am unsure of the $index_value and if they are always integers. I think, but I’m not sure, that new rows have a sting index.

something like this should work in any case

$something_changed = false;
$old_values = array();
if (have_rows('repeater', $post_id) {
  while (have_rows('repeater', $post_id) {
    the_row();
    $old_values[] = get_sub_field('sub_field');
  }
}
$new_values = array();
if (!empty($_POST['acf']['field_XXXXX'])) {
  // loop over input rows
  foreach ($_POST['acf']['field_XXXXX'] as $row) {
    // get sub field value from row
    $new_values[] = $row['field_YYYYY'];
  }
}
if (count($old_values) != count($new_values) {
  $something_changed = true;
} else {
  for ($i=0; $i<count($old_value)l $i++) {
    if ($new_values[$i] != $old_values[$i]) {
      $something_changed = true;
    }
  }
}
if ($something_changed) {
   // do something
}