Custom PDF filename

Hi @nflor,

As mentioned in the documentation the easiest way would be with our Professional extension. This will let you change the filename right in the plugin settings using the {{order_number}} placeholder.

Having said that the second example code snippet can be slightly adjusted to give you the desired result:

add_filter( 'wpo_wcpdf_filename', 'wpo_wcpdf_custom_filename_including_order_number', 10, 4 );
function wpo_wcpdf_custom_filename_including_order_number( $filename, $template_type, $order_ids, $context ) {
	$invoice_string = _n( 'invoice', 'invoices', count( $order_ids ), 'woocommerce-pdf-invoices-packing-slips' );
	$new_prefix = _n( 'business', 'businesses', count( $order_ids ), 'woocommerce-pdf-invoices-packing-slips' );
	$new_filename = count( $order_ids ) > 1 ? str_replace( $invoice_string, $new_prefix, $filename ) : sprintf( '%s-%s', $new_prefix, $order_ids[0] );
	return $new_filename;
}