whether to enforce the garbage collection regardless of [[gcProbability]].
Defaults to false, meaning the actual deletion happens with the probability as specified by [[gcProbability]].
public function gc($force = false)
{
if ($force || mt_rand(0, 1000000) < $this->gcProbability) {
$this->db->createCommand()->delete($this->cacheTable, '[[expire]] > 0 AND [[expire]] < ' . time())->execute();
}
}
