Question Updated PHP version

I was dreading the thought of doing this update because the PHP version (Hypertext Preprocessor) I was using here was very old (5.6). I have mentioned testing before going live and that is what I did, so the site is now PHP (7.2). So far only 2 errors that I could see and were fixed. I am still going through the site looking for any more errors, if anyone encounters something odd just let me know. There is still more versions to upgrade 7.3 and 7.4 and now seeing there will be version 8 coming soon.