装饰器

叙述

待续

示例代码

<?php
abstract class Component {
    public abstract function execute();
}

class ConcerteComponent extends Component {
    public function execute() {
        // do something ...
        echo __METHOD__."\n";
    }
}

abstract class Decorator extends Component {
    protected $_component;
    public function __construct(Component $component) {
        $this->_component = $component;
    }

    public function execute() {
        $this->_component->execute();
    }
}

class TextDecorator extends Decorator {
    public function execute() {
        //do something ...
        echo __METHOD__."\n";
        $this->_component->execute();
        //do something ...
    }
}

class ImgDecorator extends Decorator {
    public function execute() {
        //do something ...
        echo __METHOD__."\n";
        $this->_component->execute();
        //do something ...
    }
}

$o = new TextDecorator(new ImgDecorator(new ConcerteComponent()));
$o->execute();