How to change text on Drupal WorldPay button?

Question

I'm using the Drupal WorldPay module (for Commerce 7.x-1.11).

On the checkout page it says "Pay via WorldPay". I want to change this. I've traced it back to a line in the module:

function commerce_worldpay_bg_commerce_payment_method_info() {
  $payment_methods = array();

  $payment_methods['commerce_worldpay_bg'] = array(
     'title' => t('Payment via Worldpay'),
     'description' => t('Integration with Worldpay\'s Business Gateway method.'),
     'active' => TRUE,
     'offsite' => TRUE,
     'offsite_autoredirect' => TRUE,
     'callbacks' => array(),
   );

  return $payment_methods;
}

Specifically:

'title' => t('Payment via Worldpay'),

I think I can override this in the theme template.php but have no idea how, and there seems to be very few instructions on how one might go about it.

Answer 1

In this specific case, you can implement hook_commerce_payment_method_info_alter(&$payment_methods) in a custom module, and alter $payment_methods['commerce_worldpay_bg']['title'].

If you see other instances of the strings, which aren't changed, then you can use the String Overrides module, as already suggested, or use the $conf global variable in settings.php as follows.

$conf['locale_custom_strings_en'][''] = array(
  'Payment via Worldpay' => 'Your string',
);

Keep in mind that the latter two methods change the string wherever it is used; they don't provide a context to understand where the string is being used. This could be something you want, or not.

Answer 2

There are of course different ways you can solve your problem (e.g., by overwriting the title value in a preprocess function, in a custom theme or module). It mostly depends on taste and the structure the solution has to be.

However, in situations where you simply need to replace text on a site in an easy way, the String Overrides module comes quite in handy. It allows you to replace anything that is passed through a t() function.