Stripe API

I need a set of scripts to create and manage monthly subscriptions in stripe (and store data in a local mysql table). Php version. - The customer shall be able to create a single subscription from a html page to one or more products at the same time. Products predefined within stripe (customer will select products, quantity etc.) - Once subscribed the customer must be able to manage its subscription by changing it or by cancelling (only upgrades, no downgrades are possible). I guess we have to store the subscription id for future reference? - We have to collect in stripe the payment information (cards) connected to the specific customer, and provide the possibility to update the credit card. - We have to retrieve charges info for each active subscription into a table (payments) - We have to store failed payments into a table (failed_payments) - We must add a tax_percent if the customer country is "X" - We need to manage proration in case of subscription changes during the month. In other words functions are - create suscription - pay - modify suscription - cancel subscription - update credit card - retrive transactions (valid or invalids) Contact me for any questions.