e Here’s a great little script to see whats going to change when you update PHP on IBM i. It compares the phpinfo from your production site to your new instance of PHP. This way you can scroll down and take note of specific differences to PHP. This isn’t all the changes so there’s more to check but can get you pretty far.
There is an issue with library lists if your using the PDO_IBM driver.
Disable Z-Ray on PHP on IBM i
Edit the file /usr/local/zendphp7/etc/conf.d/zray.ini and change zray.enable=1 to zray.enable=0
; Enable Z-Ray