Extension:Jehovahsays

Jehovahsays extension allows custom HTTP security headers to be added to the wiki as configured in the LocalSettings.php file.

Trouble shooting
After downloading jehovahsays-master.zip from Git hub, extract the folder named jehovahsays-master.

Rename the folder jehovahsays-master to jehovahsays.

Copy the folder named jehovahsays and paste it into your Mediawiki Extensions folder.

Open your localsetting.php

copy and paste the code below

And now with code below added to your localsettings.php you can add html to the bottom of every wiki article.