add_filter( ‘pwgc_qr_code_url’, ‘custom_pwgc_qr_code_url’, 10, 3 );
function custom_pwgc_qr_code_url( $url, $gift_card_number, $design_id ) {
// Scanning QR Code will route to a specific website:
$url = add_query_arg( ‘gift_card_number’, $gift_card_number, $gift_card_number );

return $url;
}