Upgrading php 5.4 to php 5.6

[francesco scaglione]

I know that this question has already come up quite a few times,
I'm sorry, but I haven't found a complete answer around and so I decided
to ask here.

Since php 5.4 is going to be EOF soon, I wish to upgrade it on a system
running FreeBSD 9.3, where nginx and php-fpm are serving a small wiki.

These are the ports that depend on php 5.4: 

# pkg info -r php5
php5-5.4.45:
	php5-openssl-5.4.45
	dokuwiki-20150810a
	php5-mbstring-5.4.45
	php5-xml-5.4.45
	php5-session-5.4.45
	php5-zlib-5.4.45
	php5-gd-5.4.45

---

I was thinking about going this way:

# portmaster -o lang/php56 php5-5.4.45

and then:

# portmaster -r php5
---

But... would that be enough or do I need to know something else?

Thank you very much for your help,
Francesco