Manual:$wgFileCacheDirectory

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File Cache: $wgFileCacheDirectory
Directory where the cached pages will be saved when using server-side caching.
Introduced in version: pre 1.1.0
Removed in version: still in use
Allowed values: absolute path
Default value: "{$wgUploadDirectoryManual:$wgUploadDirectory}/cache"
(Note: The default value of this variable depends on other variables, such as the values set in Setup.phpManual:Setup.php, after LocalSettings.phpManual:LocalSettings.php is executed)
Other settings: Alphabetical | By function

Details[edit]

If you switch on server-side file caching $wgUseFileCacheManual:$wgUseFileCache = true;, then you can use this variable to specify where the cached pages will be saved on your server filesystem.

It's an absolute path, so you could specify somewhere under /tmp for example:

$wgFileCacheDirectory = "/tmp/yourcache";

...but you can specify this absolute path in relation to other directory path variables, e.g.:

$wgFileCacheDirectory = "{$wgUploadDirectory}/cache";

This specifies a "cache" directory under the image uploads directory (normally called "images"). This is the default setting in fact.

Note Note: In some versions, you must create the directory and ensure it is writeable (by the php user). This is even true if you leave it as the default (you must create e.g. the "images/cache" directory). It appears that in at least 1.15+ the directory will be created for you if it can be.

Note Note: If you are hosting multiple wikis from a shared source, you must ensure each has its own separate cache directory to avoid mis-serving pages with the same name (the Main Page, for example).

See also[edit]