Drupal 6.x

I would like to have an old version of a site (PHP 5.x) to co-exists with a new one (PHP 7.x) on the same domain. Is that possible?

Basically need to keep a Drupal 6 site that works only under PHP 5.x but have a newer site that runs Drupal 8 and PHP 7.x.
cPanel allows me to change the PHP version but that is being forced on all the domains on that account.
Hoping that we can manipulate some file to be able to make the two versions co-exist.

Hi everyone,

I've been working on our company website which was done by another company years ago and is still running Drupal 6. I've limped along with it and taught myself along the way, and kept it running.

Hello everyone!
Using DEV I installed Drupal 8 and installed an old drupal 6 site locally.
I would like to migrate from D6 to D8 using Drush, but when I run the command

drush migrate-upgrade --legacy-db-url=mysql://db:db@127.0.0.1:32772/db --legacy-root=http://mysite.ddev.site --configure-only 

I get this error:

I have seen several videos about how to use Views but are still a little confused and would ask:

Is it OK to make a change this way using ONLY save?:

View toilet_overview, displaying items of type Node.

Default - make changes and save
Admin/editor - make changes and save
All users - make changes and save

Anybody knows how to completely disable caching in drupal 6, because I have selected no chaching yet still I have to press "clear cache" at admin/settings/performance otherwise pages are out of date.