Assign users to a LearnDash Group when they purchase a specific WooCommerce product

learndash-groups-woocommerce.php

<?php
// Add user to LearnDash Group if purchases specific WooCommerce product
function jsforwp_add_user_to_group( $order_id ) {
  // Add group ID from LearnDash here
  $ld_group_id = XXXX;
  // Add product ID from WooCommerce here
  $wc_product_id = XXXX;
  $order = new WC_Order( $order_id );
  $items = $order->get_items();
  foreach ( $items as $item ) {    
    if ( $wc_product_id == $item['product_id'] ) {
      
      ld_update_group_access( $order->customer_id, $ld_group_id, false );
    }
  }
}
add_action( 'woocommerce_order_status_completed', 'jsforwp_add_user_to_group', 10, 1 );
?>

excatly what I was looking for - but now how do I use this file? :-) Thanks for clarifying!

Oh - nevermind - found it in your post here:
https://wp.zacgordon.com/2017/05/10/add-user-to-learndash-group-when-orders-a-woocommerce-product/

:-) Thanks so much for creating this!
Cheers,
Rob