<?php/** * 策略模式實(shí)例 * *///抽象策略角色《為接口或者抽象類，給具體策略類繼承》interface Strategy{  public function computePrice($price);}//具體策略角色-普通會員策略類class GenernalMember implements Strategy{  public function computePrice($price)  {    return $price;  }}//具體策略角色-中級會員策略類class MiddleMember implements Strategy{  public function computePrice($price)  {    return $price * 0.8;  }}//具體策略角色-高級會員策略類class HignMember implements Strategy{  public function computePrice($price)  {    return $price * 0.7;  }}//環(huán)境角色實(shí)現(xiàn)類class Price{  //具體策略對象  private $strategyInstance;  //構(gòu)造函數(shù)  public function __construct($instance)  {    $this->strategyInstance = $instance;  }  public function compute($price)  {    return $this->strategyInstance->computePrice($price);  }}//客戶端使用$p = new Price(new HignMember());$totalPrice = $p->compute(100);echo $totalPrice; //70?>