Manual:$wgVersion

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This deprecated feature should no longer be used, but is still available for reasons of backwards compatibility.

This feature was deprecated in version <tvar name=ver>1.35.0</tvar>.</translate>

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

Details

The current version of MediaWiki (e.g, "1.41.1"). You shouldn't need to set this option; it is used internally.

MW_VERSION

<td class="mw-version-versionbox" title="<translate nowrap> The latest stable version is <tvar name=1>1.41</tvar></translate>">

<translate> ≥</translate> 1.35

<translate> MediaWiki version:</translate>

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+
}