I'm OMV user since version 0.2 and very happy with functionality of this software.
I recently run into problem as had to reinstall OMV box due to disc failure.
Currently i have installed version 4.0 and so far so good except problems with php module.
My websites i was hosted previously seems to work, however without php functionallity.
How i can check if php is working and eventually allows websites to use php code.
For nginx and php pool configuration i have used below tutorial (8:20min):
I didn't install phpMyAdmin