What are the required Server PHP modules for OJS 3.4

Hello Friends,
We have recently had problems with viewing the pdf articles, uploading, etc. The problem solved, and the issue was, one of the php modules was not installed on our server, which was (php module fileinfo).

My question is, what are the list of all required, and recommended to have, php modules for OJS 3.4 for it to work properly. I want to make sure we have all required modules.
Thanks.

Hi @Omid,

System requirements for 3.4 are outlined here: https://docs.pkp.sfu.ca/admin-guide/en/getting-started#system-requirements

-Roger
PKP Team