Trying to install nextcloud

I am using: FreeBSD 10.3 AMD64, apache24, and php 5.6

# pkg install nextcloud

This installed nextcloud in /usr/local/www/nextcloud

From /usr/local/www/apache24/data

# ln -s /usr/local/www/nextcloud ./nextcloud

Try to run, and I get this:

> Fatal error: Class 'Memcached' not found in /usr/local/www/nextcloud/config/config.php on line 973

# pkg search memcached | grep php
php70-memcached-3.0.0b1        PHP extension for interfacing with memcached via libmemcached library

Clearly, this is for php70.

What should I do?