{
echo 'Fly with wings';
}
}
class FlyWithNo implements FlyBehavior
{
public function fly()
{
echo 'Fly with no wings';
}
}
class Duck
{
private $flyBehavior;
public function performFly()
{
$this->flyBehavior->fly();
}
public function setFlyBehavior(FlyBehavior $flyBehavior)
{
$this->flyBehavior = $flyBehavior;
}
}
class RubberDuck extends Duck
{
}
$duck = new RubberDuck();
$duck->setFlyBehavior(new FlyWithWings());
$duck->performFly();
$duck->setFlyBehavior(new FlyWithNo());
$duck->performFly();
{
$this->flyBehavior = new FlyWithWings();
$this->quackBehavior = new Quacks();
$this->name = "红头鸭\n";
}
}
class MallardDuck extends Duck
{
public function __construct()
{
$this->flyBehavior = new FlyWithWings();
$this->quackBehavior = new Squeak();
$this->name = "绿头鸭\n";
}
}
//---------------------------------------
//测试上面的代码
//---------------------------------------
$rubberDuck = new RubberDuck();
$redHeadDuck = new RedHeadDuck();
$mallardDuck = new MallardDuck();
//依次执行行为
$rubberDuck->display();
$rubberDuck->peformFly();
$rubberDuck->peformQuack();
//更改行为
$rubberDuck->setFlyBehavior(new FlyWithWings());
$rubberDuck->setQuackBehavior(new Quacks());
//执行更改后的行为
$rubberDuck->peformFly();
$rubberDuck->peformQuack();
