Manual:$wgCacheEpoch

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Cache: $wgCacheEpoch
Set this to current time to invalidate all prior cached pages.
Introduced in version: pre 1.1.0
Removed in version: still in use
Allowed values: Date/Time string
Default value: '20030516000000'
Other settings: Alphabetical | By function

Details[edit]

Set this to current time to invalidate all prior cached pages. Affects both client- and server-side caching, including assets controlled by the ResourceLoader.

For a quick copy-paste you can use the following line, which was generated using {{CURRENTTIMESTAMP}}:

$wgCacheEpoch = 20160726004008;

If you are using Linux you can get the current date by entering the following on the command-line:

date +%Y%m%d%H%M%S

To force a file, such as "LocalSettings.php" to be re-read when touched, you can use the following code (MW < 1.17):

# When you make changes to this configuration file, this will make sure that cached pages are cleared.
$wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', @filemtime( __FILE__ ) ) );

Note Note: Since version 1.17 of MediaWiki, you should use $wgInvalidateCacheOnLocalSettingsChangeManual:$wgInvalidateCacheOnLocalSettingsChange to automatically invalidate cache whenever "LocalSettings.php" is modified.

See also[edit]