Manual:$IP/de

Setting this variable to the absolute path to MediaWiki on disk from LocalSettings.php was necessary in older versions of MediaWiki. However at least since MediaWiki 1.18, setting $IP in LocalSettings.php is no longer needed. It will default to the current working directory. If there is an environment variable named MW_INSTALL_PATH defined, its value will be used instead.

Details
Die Bezeichnung „IP“ steht für include path. Die Variable beinhaltet den lokalen Dateipfad zur Basisinstallation deines Wikis. Stell sicher, dass du den vollständigen und korrekten Pfad einträgst. Füge keinen abschließenden Schrägstrich am Ende des Pfads an.

In MediaWiki 1.16 and prior, where the DefaultSettings.php file still had to be loaded from inside LocalSettings.php, the directory to load it from was determined by the IP variable.

Unlike other variables, the default is set in WebStart.php instead of DefaultSettings.php.

Setting the MW_INSTALL_PATH environmental variable can sometimes be useful when running maintenance scripts that are in non-standard directories. (Maintenance scripts by default use the parent of the current working directory as $IP).