How to change the php version from 7.2.31 to 5.6 in "1C-Bitrix: Web Environment" - Linux?

Question

PHP

There is a server on CentOS-7.8.2003 x86_64
and "1C-Bitrix: Web environment" 7.4-3

how to change the PHP version to 5.6 which still supports the mysql command
Through the environment menu, you can only rollback 1 version down to 7.1 - Rollback PHP to version 7.1

(in php 7 the standard command for working with the mysql database and most of the functions associated with it disappeared.)

Answer 1

Friends tried many options until I came across useful information that you can roll back not only to version 1. In a few steps and up to php version 5.6.40 without problems.

Solution checked, it works!
Maybe someone else will come in handy.

Answer 2

/etc/yum.repos.d/ contains files remi*.repo
There you need to set enabled=0 for the current version and set enabled=1 for the required one.
Then remove php with yum remove php and reinstall with yum install php.
But!!! there is an option to put a second set of php packages into the system - maybe this option will suit you better.
Just install it with yum install php56-php.
And then you will have the second version - if my memory serves me - to lie in / opt
PS backups and an understanding of what you are doing and how to return - if something breaks - are welcome.