MediaWiki 1.28 introduced an optional pingback feature [0][1]. This feature
is disabled by default.
The pingback feature allows MediaWiki anonymously to report back
information about its installation to help developers: the MediaWiki
version, database type, PHP version, operating system, system type (32-bit
or 64-bit), machine hardware, web server software, and memory limit.
Aggregate pingback data collected since March 2017 is now viewable at
https://pingback.wmflabs.org in graphical and tabular form. While this data
only includes sites that opted in to data collection, it shows over 40,000
unique installations of MediaWiki in the last year in a variety of
different configurations.
Enjoy exploring the aggregate data!
[0]
https://www.mediawiki.org/wiki/Manual:$wgPingback
[1]
https://wikimediafoundation.org/wiki/MediaWiki_Pingback_Privacy_Statement
______________________________
Cindy Cicalese
Product Manager, MediaWiki Platform
Wikimedia Foundation