yii\caching\MemCache::getValues PHP Method

Retrieves multiple values from cache with the specified keys.

protected getValues ( array $keys ) : array
$keys	array	a list of keys identifying the cached values
return	array	a list of cached values indexed by the keys

    protected function getValues($keys)
    {
        return $this->useMemcached ? $this->_cache->getMulti($keys) : $this->_cache->get($keys);
    }

MemCache