A few years ago I installed Apache 2.2x and PHP 5.3.1 on a Linux server I maintain. I used .tar.gz\'s and built them as instructed (instead of rpms and what-have-you). And
For SAPI: php-fpm
There is no need to create a php.info file (it is not a good policy to leave it for the world to read anyway). On the command line:
php-fpm -i | more
Somewhere in its output, it will show this line:
Configuration File (php.ini) Path => /etc
Here is a more complete explanation: https://www.cloudinsidr.com/content/how-to-figure-out-your-php-configuration-parameters-without-info-php/