How to create php.ini on default php version?

Question

PHP

Good afternoon. Faced a problem. I decided to upgrade to the latest version of PHP 7.2.3, and when I downloaded it, I ran into a problem that the MySQL and PDO drivers were not connected. In general, I did not find the php.ini file in the interpreter at all and would like to know what to create it? If possible, then formulate the answer simpler, because I'm a noob ...

Answer 1

specifies the phpinfo();path to the connected php.ini