Change invoice prefix with custom field

Hi @rbtmj2,

When you say “invoice prefix”, are you talking about the filename of the invoice? Or maybe the invoice number itself that appears in the invoice?

The invoice number for example WEB-0001 I want to change WEB for other prefix if a custom field is empty or not

Hello @rbtmj2,

Please try adding this code snippet to your site:

add_filter('wpo_wcpdf_document_number_settings','wpo_wcpdf_document_number_variable_prefix',10,2);
function wpo_wcpdf_document_number_variable_prefix( $number_settings, $document ) {
  if (!empty($document->order) && $document->get_type() == 'invoice') {
    $custom_field =  $document->order->get_meta('custom_field_name');
    if (empty($custom_field)) { // Custom field is empty
      $number_settings['prefix'] = "WEB-";
    } else { // Custom field has a value
      $number_settings['prefix'] = "WEBDNI-";
    }
  }
  return $number_settings;
}

If you haven’t worked with code snippets (actions/filters) or functions.php before, read this guide: How to use filters

Let me know if it works! ??

It worked!!!

Thank you so much

Also its possible that the different prefix invoice are count different? I mean if you have WEBID-0004 and the user left the custom filed empty the next invoce is WEB-0001