PayPal Subscription payment Integration in php: create a subscription plan

Hello , Do I need to create a plan for every subscription , and how do I associate multiple plans to a single product

Hello, thank you for all these videos, could you make a video about the update of a subscription when a user changes his mind during his month of subscription
exp: the user takes subscription A on the 1st of the month and choose after 10 days to take subscription B which is more expensive than subscription A. we find only pieces of code on the description of the api but I don't understand how to do it. Could you help me? For the api rest php, thank you very much

hello please this is a nice video, pls can i get the PHP source code