1. 7. Copy AuthJoomla.php
Please try to find the “AuthJoomla/AuthJoomla.php” from your joomlawikibrige folder.
And upload that to the “MediaWiki_Directory/extensions/”.
8. Rename “index.php”
After doing all these please make sure to rename the “index.php” to “inc_index.php” file
on the main directory of the MediaWiki
9. Copy Other Files (index.php, joomwiki_engine.php, joomlawiki.css)
Please find these files from the installation folder you have provided to: upload all these
files to main folder of the MediaWiki.
10. Set variable in joomwiki_engine.php
Set the variables in joomwiki_engine.php which is located on main folder of MediaWiki,
download the file, and set the “$wgAuthJoomla_domain” on line number “3”, you have
to provide the joomla installation location URL i-e (http://yourdomain.com/joomla/), then
upload the file again to server.
11. Add your settings to LocalSettings.php

2. Download the LocalSettings.php from the main folder of the MediaWiki, set the
following variables:
$wgAuthJoomla_MySQL_Host = 'localhost';
Set your hostname for your joomla location, replace 'localhost' with your
'yourjoomla_hostname'
$wgAuthJoomla_MySQL_Username = 'user_name_db_joomla';
Set your mysql username for your joomla; replace 'user_name_db_joomla' with your
'yourjoomla_db_username'
$wgAuthJoomla_MySQL_Password = 'password_joomla_db';
Set your mysql password for your joomla; replace 'password_joomla_db' with your
'yourjoomla_db_password'
$wgAuthJoomla_MySQL_Database = 'NameDBJoomla';
Set your mysql database name for your joomla; replace 'NameDBJoomla' with your
'yourjoomla_db_name'
$wgAuthJoomla_TablePrefix = " jos_";
Set your joomla table prefix for your joomla; replace " jos_" with your
"yourjoomla_prefix", one blank sing before jos - important!
$wgAuthJoomla_Path = '/home/vhost/Joomla';
Set your joomla path; replace '/home/vhost/Joomla' with your
'/home/yourdomain/public_html/joomla'
That’s all, try opening external link from the joomla website.