How can the {$oID} variable be properly implemented in the checkout_success.html template in xt:Commerce?

To properly implement the $oID variable in the checkout_success.html template in xt:Commerce, you need to ensure that the variable is correctly passed from the checkout process to the template. This can be done by modifying the PHP code that processes the checkout and includes the $oID variable in the template data. Once the $oID variable is available in the template, you can then use it to display the order ID to the customer on the checkout success page.

```php
// Modify the PHP code that processes the checkout to include the $oID variable in the template data
// For example, if $oID is the order ID, you can pass it to the template like this:
$template->assign('oID', $oID);
```
This code snippet assumes that the template object is named $template and that $oID contains the order ID. Make sure to adjust the variable names and objects to match your specific implementation.