We have this online education website ([url removed, login to view]) and we want to integrate with paypal's API. It's built with PHP CodeIgniter framework. Nowadays we use brazillian payment service called PagSeguro but we need to accept international payments and it does not provide us that. We prefer PayPal Pro which allows the user to finish the purchase without leaving our environment, but we would accept the in-context express checkout as well (since it's probably faster to configure). This task needs to be ready by the end of next week.