wf_pklist_add_package_product_meta.php

<?php
/* This code was provided by WebToffee support on 10/21/25
 * Makes Plugin Republic's Product Add-ons plugin available to use in the packing list PDF
 */
add_filter( 'wf_pklist_add_package_product_meta', 'wf_pklist_add_additional_fields', 10, 5 );
function wf_pklist_add_additional_fields( $additional_product_meta, $template_type, $_product, $order_item, $order ) {
  if ( 'packinglist' !== $template_type ) {
    return $additional_product_meta;
  }

  $order_item_id = isset( $order_item['order_item_id'] ) ? $order_item['order_item_id'] : 0;
  if ( ! $order_item_id ) {
   return $additional_product_meta;
  }

  $meta = wc_get_order_item_meta( $order_item_id, 'product_extras', true );

  if ( empty( $meta ) || ! is_array( $meta ) ) {
    return $additional_product_meta;
  }

  foreach ( $meta as $meta_group ) {
    foreach ( $meta_group as $meta_values ) {
      foreach ( $meta_values as $meta_data ) {
        if ( ! empty( $meta_data['label'] ) && isset( $meta_data['value'] ) ) {
          $additional_product_meta .= sprintf(
            '<small><br>%s: %s</small>',
            esc_html( $meta_data['label'] ),
            esc_html( $meta_data['value'] )
          );
        }
      }
    }
  }

  return $additional_product_meta;
}