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  • Sorry about the typo in my code, glad you got it working.

    Nested repeaters need nested loops

    Let’s say that the key for the repeater is field_123 and the key for the nested repeater is key_321

    if (!empty($_POST['acf']['key_123']) && is_array($_POST['acf']['key_123'])) {
      foreach ($_POST['acf']['key_123'] as $row) {
        // nested repeater
        if (!empty($row['key_321']) && is_array($row['key_321'])) {
          foreach ($row['key_321'] as $sub_row) {
            $something = $sub_row['some-field-key'];