Reply To: Add a custom field to post permalink

• John Huebner

• August 4, 2020 at 11:25 pm

You need to change the post slug.

add_action('acf/save_post', 'modify_post_slug');
function modify_post_slug($post_id) {
  $ref = get_field('ref', $post_id);
  if ($ref) {
    $post = get_post($post_id);
    $slug = sanitize_title($post->post_title.' '.$ref);
    $post->post_name = $slug;
    remove_filter('acf/save_post', 'modify_post_slug');
    wp_update_post($post);
    add_action('acf/save_post', 'modify_post_slug');
  }
}