Update PHP globally

[Carmel NY]

I presently have php56 installed on a FreeBSD-11 system. I also have joomla3
installed, along with several other programs thus use php.

Now joomla4 will require php70 as a minimum to operate. I want to update php
to the latest version in FreeBSD, php72 and have all of the installed programs
that utilize php use that version.

I use 'synth' as my update manager. I was thinking I could do something like
this:

1) Have synth build but not install the php72 and php72-extension ports

2) pkg set -o lang/php56:lang/php72

3) Run synth to update the system

Would that work?

Thanks!

-- 
Carmel