How can I make a push notification for a mobile device in php?

Question

Push technologies

Hello, I have such a task
If the user clicks, I need him to send a push notification.
How to do this?
Then tell me about the token?
Do I need to create a separate table for tokena or is a separate column in the users table sufficient?
How to make a token?
How to compare a token with an existing token?

Answer 1

https://github.com/edamov/pushok
Strictly speaking, one user can have multiple mobile devices or multiple applications on the same device, I would make a one-to-many connection. You need to look at your business logic.
Apple itself generates the token and informs you.