Hello. I'm still new to this community, love to develop in php, as a main backend language, but today, I got a pretty good challenge, that basically put me against a wall. I'm not really into working with payment API in php (not really into security, so payment = danger in case of security issue) but one of my friend need more like a script, that basically would handle payment through mobile credit (globally). I might figure out some stuff from their docs on API, but I really have no idea what mobile payment wallet to pick. He don't have any account on mobile payment wallets, where the money should go, so he asked me if along the programming, I could pick him a website for that. It's not like a php dev direct question, but can someone advice me a wallet and maybe some "tips" on how to handle the api? I was thinking of creating a class that would have the basic methods for this and after that create 1 file that would handle processing the api receives from the actual wallet (In case of success, display a message, add credits and redirect, in case of failure the same, but without adding credits). I would aswell want (if it's possible) that the wallet in his api would have sending request available, like on pay page, he would have to put his number on my friend's website page, and when he press pay, I would call a method that would send a request to the wallet to send a query for payment (like those: Reply with xxss to confirm that he wants to spend xxx $). Sorry for the long story, but it's pretty much the first time when I work with payment api (besides paypal of course) and it's pretty confusing to me.