MatthiasMullie\Scrapbook\Adapters\Apc::delete PHP Method

    public function delete($key)
    {
        // lock required for CAS
        if (!$this->lock($key)) {
            return false;
        }
        $success = $this->apcu_delete($key);
        unset($this->expires[$key]);
        $this->unlock($key);
        return $success;
    }