Head First设计模式PHP版

本代码根据《Head First设计模式》一书中的java代码改写而来。

策略模式

观察者模式

<?php/** * Created by PhpStorm. * User: shindou * Date: 16/7/14 * Time: 下午10:19 */namespace Observer;interface Subject{    public function registerObserver($o);//Observer    public function removeObserver($o);//Observer    public function notifyObserver();}//interface Observer{    public function update($temperature,$humidity,$pressure);//float temp}interface DisplayElement{    public function display();}//class WeatherData implements Subject{    private $observers;    private $temperature;    private $humidity;    private $pressure;    public function registerObserver($o){        // TODO: Implement registerObserver() method.        $this->observers[] = $o;    }//    public function removeObserver($o){        // TODO: Implement removeObserver() method.        unset($this->observers[$o]);    }//    public function notifyObserver(){        // TODO: Implement notifyObserver() method.        foreach($this->observers as $observer){            $observer->update($this->temperature,$this->humidity,$this->pressure);        }    }    public function measurementsChanged(){        $this->notifyObserver();    }    public function setMeasurements($temperature,$humidity,$pressure){        $this->temperature = $temperature;        $this->humidity = $humidity;        $this->pressure = $pressure;        $this->measurementsChanged();    }}class CurrentConditionsDisplay implements Observer,DisplayElement{    private $temperature;//float    private $humidity;//float    private $weatherData;//subject    public function __construct(Subject $weatherData){        $this->weatherData = $weatherData;        $this->weatherData->registerObserver($this);    }    public function update($tempperature,$humidity,$pressure){        // TODO: Implement update() method.        $this->temperature = $tempperature;        $this->humidity = $humidity;        $this->display();    }    public function display(){        // TODO: Implement display() method.        echo("Current conditions:".$this->temperature."F degrees and ".$this->humidity."% humidity\n");    }}$WeatherData = new WeatherData();$currentDisplay = new CurrentConditionsDisplay($WeatherData);$WeatherData->setMeasurements(80,65,'30.4f');$WeatherData->setMeasurements(82,70,'29.2f');$WeatherData->setMeasurements(78,90,'29.2f');

装饰者模式

<?php/** * Created by PhpStorm. * User: shindou * Date: 16/7/16 * Time: 下午10:19 */namespace Decorate;abstract class Beverage {    protected $description = "Unknown Beverage";    /**     * @return string     */    public function getDescription(){        return $this->description;    }    public abstract function cost();}abstract class CondimentDecorator extends Beverage{    //php中抽象类无法重写原抽象类中的}class Espresso extends Beverage{    public function __construct(){        $this->description = "Espresso";    }    public function cost(){        return 1.99;    }}class DarkRoast extends Beverage{    public function __construct(){        $this->description = "DarkRoast Coffee";    }    public  function cost(){        return .99;    }}class HouseBlend extends Beverage{    public function __construct(){        $this->description = "House Blend Coffee";    }    public function cost(){        return .89;    }}class Mocha extends CondimentDecorator{    protected $beverage;//Beverage类型    public function __construct(Beverage $beverage){        $this->beverage = $beverage;    }    public function getDescription(){        // TODO: Implement getDescription() method.        return $this->beverage->getDescription().", Mocha";    }    public function cost(){        // TODO: Implement cost() method.        return .20 + $this->beverage->cost();    }}class Soy extends CondimentDecorator{    protected $beverage;    public function __construct(Beverage $beverage){        $this->beverage = $beverage;    }    public function getDescription(){        return $this->beverage->getDescription().", Soy";    }    public function cost(){        // TODO: Implement cost() method.        return .15 + $this->beverage->cost();    }}class Whip extends CondimentDecorator{    protected $beverage;    public function  __construct(Beverage $beverage){        $this->beverage = $beverage;    }    public function getDescription(){        return $this->beverage->getDescription().", Whip";    }    public function cost(){        // TODO: Implement cost() method.        return .10 + $this->beverage->cost();    }}$beverage = new Espresso();echo ($beverage->getDescription()." $".$beverage->cost()."\n");$beverage2 = new DarkRoast();$beverage2 = new Mocha($beverage2);$beverage2 = new Mocha($beverage2);$beverage2 = new Whip($beverage2);echo ($beverage2->getDescription()." $".$beverage2->cost()."\n");$beverage3 = new HouseBlend();$beverage3 = new Soy($beverage3);$beverage3 = new Mocha($beverage3);$beverage3 = new Whip($beverage3);echo ($beverage3->getDescription()." $".$beverage3->cost()."\n");

工厂模式

单件模式

命令模式

适配器与外观模式

迭代器与组合模式

状态模式

代理模式

复合模式