PHP Site assistant code on FMS v18 and above

[Dr. Zathras]

We're currently running a FM database on FMS v16 with web access via code generated by the old PHP site assistant. Our IT Security people require us to upgrade the server from OS X 10.12 Sierra to 10.15 Catalina, so of course that means we have to take FMS from v16 to v18. I've read that the PHP code generated by PHP site assistant is not compatible with the newer PHP which comes with FMS v18.

I'm going to need some help from our web group to upgrade the web code and I first need to be able to describe the problem as they have no FileMaker experience. Does anybody know which version of PHP is used by the site assistant and which version comes with FMS v18 and FMS v19? Also, does anybody have experience taking PHP Site Assistant code and using it on newer versions of FMS? Just how big of a job is it to make the older code compatible?

Thanks

Colin Hunter