I don't think the payment process is anything that you can just glance over. The CMS I have written accepts two forms of payment, SagePay and Commidea. There a

I don't think the payment process is anything that you can just glance over. The CMS I have written accepts two forms of payment, SagePay and Commidea. There are lots of good examples for SagePay in most languages. I found Commidea to be the worst integration I have ever had to do. If you use SagePay iFrame as I do then you do not ever touch the credit card, it all is handled in an iFrame and they authorise the card etc. This gets you round the PCI DSS requirements. All you need is a couple of pages to handle post backs etc to tell SagePay where to send the authorisation details etc. The problem you will have is with membership. If you're in the UK then its hard to get a bank or merchant to allow you to take 1 year memberships and take payment for them. If for whatever reason your site fails after 6 months then it is the bank who has to pay back the membership money. For this reason, I use Paypal for membership items