AppserverIo\Appserver\ServletEngine\Http\Session::checksum PHP Method

    public function checksum()
    {
        // create an array with the data we want to add to a checksum
        $checksumData = array($this->started, $this->id, $this->name, $this->data);
        // create the checksum and return it
        return md5(json_encode($checksumData));
    }