MatthiasMullie\Scrapbook\Adapters\Memcached::cas PHP Метод

    public function cas($token, $key, $value, $expire = 0)
    {
        if (!is_float($token)) {
            return false;
        }
        $key = $this->encodeKey($key);
        return $this->client->cas($token, $key, $value, $expire);
    }