Facebook app - implementing notifications

I'm writing a Facebook app which needs to send reminders to users at set dates in the future. When searching for how to implement these notifications I find a lot of talk about how Facebook removed app notifications and you now either have to use counters or send the us开发者_JAVA百科er emails. Emails I understand, but there's nothing about "counters" in the graph API docs or the PHP SDK. Could someone point me in the right direction?

The old Facebook rest api had a method called "notifications.send" which is what I think you are referring to but that has been completely removed and you won't see any documentation on it from Facebook's end. You can view the old documentation through the wayback machine. There currently is no other good alternative to this old method besides email/Facebook messaging unfortunately.