Android-android gcm push, which method is better for tens of millions of users to use php?

Android gcm push: Which php method is better for tens of millions of users? What method is php better for Android gcm push? What method is php better for tens of millions of users?

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Android gcm push, which method is better for tens of millions of users to use php?

We do not recommend that you use a third-party push Aurora Baidu Xiaomi, etc.

If you have tens of millions of users, the cost is too high. We recommend that you use professional third-party push: Personal push, Xiaomi, Baidu, etc. This saves a lot of development costs, you can focus on polishing products and interacting with users.

Forgive my IQ