How to get the client_id of oauth 2.0?

refer to the following article to implement the server on your own:

in authorization code mode, how to obtain the following client id:

I think the client id must be applied to the service provider in advance and provided by the service provider after being allowed to access by the service provider. Then the third-party application can use it. How can you get this client-side Id?

Oauth2.0 php

Mar.20,2021

you can refer to the parameters of qq login

CLIENT_ID is assigned after registration.

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