Update - contacted GoDaddy, and two hours later...
The last message from GoDaddy is that they will not do anything in my current, old and outdated, hosting setup to accommodate this script's failure.
I tried the code change in lines 725-726 as Ken mentioned but the same warning messages.
So have gone back to the previous ec_lightning.php
www.komokaweather.ca/wxeclightning.php so no warnings/errors reported.
GoDaddy does offer a couple of suggestions:
1. With my current hosting I have one free (for one year) Classic Linux hosting to cPanel offer so I could move my
www.komokaweather.ca (Saratoga site) on its own rather than redirect as the current
www.komokaweather.com/komokaweather-ca and that would overcome some difficulties that now exist.
2. I can move all my hosting to cPanel at a current 10% discount for one year, or 20% for 2 years, or 30% for 3 years. And then I can move to PHP v7
My hosting and domain names (7) renew in a month.
Secure hosting for multi domains is $150 a year on 5 year plan. But the support person said that there are free alternatives such as Let's Encrypt that will work.
More dollars... but worse, much more work and potential headaches. What to do?!
Paul