PHP class, analytics system?

Question

PHP

In our project, there was a question about the analytics of site traffic, the number of users, from which countries, browsers, keywords, and so on.
We need a solution, such that the analytics would be in the project itself, a certain php class that implements all this.
We found an interesting Piwik project , it is good, but not suitable, the main condition is that the analytics take place in the project itself, and not on the servers of other companies (Google Analytics).
Who faced it? please advise any solution.

Answer 1

No one scatters serious developments, and simple analytics can be written in a couple of hours (number of users, from which countries, browsers, keywords). Google and Yandex statistics can be built into the admin panel using their API so that the user will not even know where the data comes from.

Answer 2

Piwik is hosted by you
piwik.org/docs/installation-maintenance

Answer 3

https://razorflow.com/
https://razorflow.com/features/#component_kpi