Joomla 3.8.x on FreeNas 11.1 (11.2) with PHP 7.2 or newest

[Jedrek]

Hi.
I decided to create a new thread because nowhere can I find a solution to my problem. I hope that some of my users will help me.
I currently have Joomla 3.8.12 installed on my Freenas 11.1u6. I am using the standard PHP 5.6.x, for which the support ends and Joomla requires PHP upgrade to the possibly newest version, ie 7.2.10 (currently).
I've tried several ways to install the new version and run my site back, but to no avail.
I am asking for help and a prescription on how to update PHP preferably without additional installation of other components.
If you have a ready procedure, please enter it.
Thank you

I was updated ports and if I was execute command "make install clean" I was have a message:

/!\ ERROR: /!\

Ports Collection support for your FreeBSD version has ended, and no ports are
guaranteed to build on this system. Please upgrade to a supported release.

No support will be provided if you silence this message by defining
ALLOW_UNSUPPORTED_SYSTEM.

*** Error code 1

Stop.
make[1]: stopped in /usr/ports/lang/php72
*** Error code 1

Stop.
make: stopped in /usr/ports/lang/php72
root@joomla-server1:/usr/ports/lang/php72 #

What I make wrong ?
My Freenas version: 11.1u6

I make my install from: https://docs.joomla.org/FreeBSD_Installation

 

[Jailer]

What is the output of freebsd-version from the jail.

 

[Jedrek]

JAIL version: 11.0-RELEASE-p1

how raise (update) it
Must I create new jail ?

 

[Jailer]

Must I create new jail ?

Yes, using iocage via the cli. There are several posts on how to do that here on the forum.