according to this answer, as of PHP 7 the regular php.ini file was removed and added with php.ini-production and php.ini-devlopment.
so instead of php.ini which does not exist in my case (I've installed php 8.1), use php.ini-production and it's located in php installation folder (something like: C:\PHP-8.1.5) and create a file and name it php.ini and then copy contents of php.ini-production in this new php.ini.