Step 1: Find the Extension You Need

Before you can install an extension, you need to find one that suits your needs. The best place to search for extensions is the official MediaWiki extensions repository at MediaWiki Extensions.

Step 2: Download the Extension

1. Navigate to the extension page on the MediaWiki website.
2. Read the documentation to understand the features and requirements of the extension.
3. Download the extension files. This is typically done by downloading a .zip file or cloning a Git repository.

Step 3: Upload the Extension to Your Server

Once you have downloaded the extension, you need to upload it to your MediaWiki installation:

1. Use an FTP client or your hosting provider’s file manager to upload the extension files.
2. Upload the extension files to the extensions directory of your MediaWiki installation (e.g., /path/to/mediawiki/extensions).

Step 4: Install the Extension

After uploading the extension files, you need to install the extension by adding a line to your LocalSettings.php file:

// Example for installing an extension
wfLoadExtension( 'ExtensionName' );
            

Replace ExtensionName with the name of the extension you are installing. Some extensions may have different or additional installation instructions, so always refer to the extension’s documentation.

Step 5: Configure the Extension

Many extensions come with configuration options that you can set in your LocalSettings.php file. Refer to the extension’s documentation for details on available configuration settings and how to apply them.

// Example configuration for an extension
$wgExampleSetting = true;
            

Step 6: Verify the Extension

After installing and configuring the extension, verify that it is working correctly:

1. Go to your MediaWiki site and test the new features added by the extension.
2. Check for any errors or issues in your site’s functionality.
3. Refer to the extension’s documentation or support page for troubleshooting tips if you encounter any problems.