Warning Warning: It is recommended you use the WANObjectCache service. However, if you really need the internal object, use ObjectCache::getLocalClusterInstance instead.

$wgMemc is the global variable used to access the main cache. It is set in Setup.php :

$wgMemc = ObjectCache::getLocalClusterInstance();

wfGetMainCache() edit

(deprecated in 1.32) Past global function wfGetMainCache() defined in Manual:GlobalFunctions.php as follows:

function wfGetMainCache() {
	return ObjectCache::getLocalClusterInstance();

For documentation of the generic class instance it contains, see BagOStuff.

See also edit