Is it ok to run 2 versions of php on the same computer?

Question

PHP

Good day)
Actually, is it normal to install and use 2 versions of php, i.e. php 5.6 and php 7.0?
I found an article on installation and configuration here on
Ubuntu 16.04 OS
Maybe someone uses 2 versions, please write it down)))
UPD
The main PHPStorm development environment

Answer 1

on gent and 2 and 3
different versions of php work in production on gentoo