Trouble Installing PHP5

[JCMPine64]

PHP7 installs just fine on Ubuntu

Code:

root@pine64-2gb:~# apt-get install -s php7.0-fpm

There is no PHP5 in Xenial as it is outdated and slow.

Yes, PHP7 installs just fine, but when I follow the instructions for installing DokuWiki it fails at

Code:

sudo nginx -t

Not sure if I screwed something up, if the instructions being for a VPS mean that it can't work, or if Pine64 can't do it.