PHP设计模式之装饰者模式代码实例

《：PHP设计模式之装饰者模式代码实例》要点：
本文介绍了：PHP设计模式之装饰者模式代码实例，希望对您有用。如果有疑问，可以联系我们。

界说：PHP编程

装饰者模式就是不修改原类代码和继承的情况下动态扩展类的功能.传统的编程模式都是子类继承父类实现办法重载,使用装饰器模式,只需添加一个新的装饰器对象,更加灵活,避免类数量和层次过多.PHP编程

脚色：PHP编程

Component(被装饰工具基类)
ConcreteComponent(具体被装饰工具)
Decorator(装饰者基类)
ContreteDecorator(具体的装饰者类)PHP编程

示例代码：PHP编程

//被装饰者基类
interface Component
{
  public function operation();
}
 
//装饰者基类
abstract class Decorator implements Component
{
  protected $component;
 
  public function __construct(Component $component)
  {
    $this->component = $component;
  }
 
  public function operation()
  {
    $this->component->operation();
  }
}
 
//详细装饰者类
class ConcreteComponent implements Component
{
  public function operation()
  {
    echo 'do operation'.PHP_EOL;
  }
}
 
//详细装饰类A
class ConcreteDecoratorA extends Decorator {
  public function __construct(Component $component) {
    parent::__construct($component);
 
  }
 
  public function operation() {
    parent::operation();
    $this->addedOperationA();  // 新增加的操作
  }
 
  public function addedOperationA() {
    echo 'Add Operation A '.PHP_EOL;
  }
}
 
//详细装饰类B
class ConcreteDecoratorB extends Decorator {
  public function __construct(Component $component) {
    parent::__construct($component);
 
  }
 
  public function operation() {
    parent::operation();
    $this->addedOperationB();
  }
 
  public function addedOperationB() {
    echo 'Add Operation B '.PHP_EOL;
  }
}
 
 
class Client {
 
  public static function main() {
    /*
    do operation
    Add Operation A
    */
    $decoratorA = new ConcreteDecoratorA(new ConcreteComponent());
    $decoratorA->operation();
 
 
    /*
    do operation
    Add Operation A 
    Add Operation B 
    */
    $decoratorB = new ConcreteDecoratorB($decoratorA);
    $decoratorB->operation();
  }
 
}
 
Client::main();

欢迎参与《：PHP设计模式之装饰者模式代码实例》讨论，分享您的想法，编程之家 jb51.cc为您提供专业教程。