Extensions are distributed separately. Drop them into this directory and enable
as per the extension's installation instructions.
You can find a list of extensions and documentation at
<https://www.mediawiki.org/wiki/Category:Extensions>.
If you are a developer, you might want to fetch the extension tree in another
directory and make a symbolic link:
mediawiki/extensions$ ln -s ../../extensions-trunk/FooBar
Most extensions are available through Git:
https://phabricator.wikimedia.org/diffusion/MEXT/
Please note that under POSIX systems (Linux...), parent of a symbolic path
refers to the link source, NOT to the target! You should check the env
variable MW_INSTALL_PATH in case the extension is not in the default location.
The following code snippet lets you override the default path:
$IP = getenv( 'MW_INSTALL_PATH' );
if( $IP === false ) {
$IP = __DIR__ . '/../..';
}
require_once "$IP/maintenance/Maintenance.php"; // a MediaWiki core file
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