Upgrade Php Version

I have done a search for this and haven't been able to find any documentation on it. I would like to upgrade the version of PHP that my CS Cart Multivendor Ver 12.X is running on.

Is there any danger to this?

Does anyone have experience with an upgrade of this nature and did it cause any issues or downtime?

Maximum supported version for 4.12.x is PHP 7.4. You can update up to this version without any issues

We've been toggling 7.2-7.4 on various builds from 2020-now without any issues plus or minus some warnings in the error logs.

Individual results will vary based on your addons or theme used (if not stock).