How do I install Fileinfo?

Introduction

How to install the PHP module fileinfo. 

Procedure

1. Navigate to Software -> EasyApache4
2. Click the button that says Customize next to Currently Installed Packages
3. Click PHP Extensions
4. Search for Fileinfo in the search bar and select the extensions you would like to install
5. Click Review
6. After looking over the proposed changes, scroll to the bottom of the screen and click provision.