www/owncloud depends on php56, which is deprecated. Please consider to flavorize the port, much like www/nextcloud is.
For reference, nextcloud was flavorized in SVN ports-revision 468708. This was tracked in #227510 and reviewd on https://reviews.freebsd.org/D15235.
A commit references this bug:
Date: Wed Jan 30 19:22:35 UTC 2019
New revision: 491651
Add PHP flavor
- Cosmetic change
Requested by: Christian Ludwig <email@example.com>