liquidhal

I'm pretty sure I installed it right. Testing credit card authentication with sandbox seemed to work correctly. However, after the final step of the checkout process, I get I found some people on google mentioned php version changes, does anyone know how to fix this?

I've been slowly working on setting up an oscommerce site, coming from no experience in the field, so bear (bare?) with me. Getting an SSL certificate seems expensive and troublesome. I understand that when taking credit cards on your site it's absolutely necassary, but as I understand the paypal IPN module, all the sensitive credit card info is handled in paypal's site. Does this let me off the hook in regards to getting an SSL certificate? I suppose the paypal express/pro features would require SSL. I browsed the SSL providers, the lowest I've found is about $150 a year, is that what people generally pay?