Design-patterns/strategy.php at master · LaughingMeMe/Design-patterns · GitHub

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<?php

//策略模式，帮助构建的对象不必自身包含逻辑，而是能够根据需要利用其他对象中的算法

class CD{

public $_title;

public $_band;

protected $_strategy;

public function __construct($title,$band){

$this->_title = $title;

$this->_band = $band;

}

public function setStrategy($strategy){

$this->_strategy = $strategy;

}

public function get(){

$this->_strategy->get($this);

}

interface strategy{

public function get(CD $cd);

}

class BuyStrategy implements strategy{

public function get(CD $cd){

echo $cd->_title.'Buy';

}

class SellStrategy implements strategy{

public function get(CD $cd){

echo $cd->_title.'Sell';

}

$cd = new CD('aaa','xxx');

$cd->setStrategy(new BuyStrategy());

$cd->get();

//此结构中CD类不包含逻辑，调用buyStrategy对象来实现需求

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