Is there a database of valid User Agents broken down by browsers?

Question

Browsers

It is necessary to determine who is requesting the page - the user in the browser or a bot.
You need to define it on the server side, javascript will not work.
The task of resisting the intentional substitution of the User Agent by bots is not worth it.
Are there any up-to-date lists of UAG matches for specific browsers in nature?

Answer 1

http://php.net/manual/ru/function.get-browser.php
For this function to work, the correct path to the browscap.ini file on your system must be set in the browscap installation in the php.ini settings.
http://tempdownloads.browsercap.com/

Answer 2

https://github.com/tobie/ua-parser/