Update php version with 7.2

I am using oxid version 4.10.x with running php version 7.0.x but, now I want update php version with 7.2.x
Also, there are running encrypted file in the store.
So, can you please guide me what exact steps that I need to follow to upgrade php version with 7.2.x.

Please provide me steps that I have to follow to upgrade php version for same.

Thank you.

After enabling php 7.2:
Step 1: test any shop page for errors
Step 2: check error log
Step 3: fix the problem stated in the last error
Step 4: repeat until all errors are fixed