Manual:$wgVersion

General Settings: $wgVersion
MediaWiki version number.
Introduced in version:	1.2.0
Deprecated in version:	1.35.0 (Gerrit change 481950; git #a5d5ea82)
Removed in version:	Still in use
Allowed values:	(string)
Default value:	Current MediaWiki version - you shouldn't change this!
Other settings: Alphabetical | By function

Details

The current version of MediaWiki (e.g, "1.42.3"). You shouldn't need to set this option; it is used internally.

MW_VERSION

MediaWiki version:

≥ 1.35

Starting with MediaWiki 1.35, $wgVersion is deprecated, and replaced with the MW_VERSION constant. It is also available in MediaWiki 1.31.7, 1.33.3 and 1.34.1, though this should not be relied on as its presence is required for some release tools. $wgVersion will continue to function the same as before in those versions.

Example code

If you're implementing a new feature that only works in MediaWiki 1.19 or later, but you want to maintain backwards compatibility, you could use a test such as the following:

global $wgVersion;
$oldVersion = version_compare( $wgVersion, '1.18', '<=' );

if ( $oldVersion ) {
    # Do stuff for MediaWiki 1.18 and older
} else {
    # Do stuff for MediaWiki 1.19+
}

MediaWiki version:

≥ 1.35

$oldVersion = version_compare( MW_VERSION, '1.39', '<' );

if ( $oldVersion ) {
    #  Do stuff for MediaWiki 1.35 - 1.38
} else {
    #  Do stuff for MediaWiki 1.39+
}

However, it is typically recommended that you use feature detection to see whether the method or class you wish to use is available instead of depending upon raw version strings.

See also

• Special:Version – View the version number of a MediaWiki installation (plus much more information) from the web interface.
• Manual:Upgrading
• Version