I need to do a web page with online payment for customers

I have a few websites that take online payments from customers. They use PayPal Business and Stripe.

For the latter I created Business::Stripe::WebCheckout which you may find useful. If you only have simple transactions of a number of items and do not need recurring payments, it simplifies implementing a payment gateway using Perl.

I would have no hesitation recommending Stripe as a payment gateway.