Change Details

getConfiguration.php script can export various settings, it is also used to import configurations in SiteConfiguration.php. However, due to a bug in `isAllowedVariable()` function, it [[ https://github.com/wikimedia/mediawiki/blob/master/maintenance/getConfiguration.php#L178 | allows only values ]] which are arrays or [[ http://php.net/is_scalar | is_scalar ]](). Unfortunately, `is_scalar(NULL)` is false, so it produces an error if any config variable is set to null.