private $_state = null;
public function getState()
{
return $this->_state;
}
public function setState($state)
{
$this->_state = $state;
}
public function createMemento()
{
return new Memento($this->_state);
}
public function setMemento($memento)
{
$this->_state = $memento->getState();
}
public function display()
{
echo "state = " . $this->_state . "<br/>";
}
}
$objOriginator = new Originator();
$objOriginator->setState(0);
$objOriginator->display();
$objCareTaker = new CareTaker();
$objCareTaker->setMemento($objOriginator->createMemento());
$objOriginator->setState(1);
$objOriginator->display();
$objOriginator->setMemento($objCareTaker->getMemento());
$objOriginator->display();
