PHP design pattern factory method

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Today I focused on learning Factory Method (FactoryMethod)This design pattern, the following are some of my learning experiences and experiences, make a record:

Factory Method It is one of the creational modes among the 23 modes. Since I have some understanding of simple factories before, the factory method is an evolution of simple factories. It can be seen from simple factories that a class that interacts with the client must It is a tiring process to create multiple different classes, and the factory method is to split this interactive class on its basis so that each class can be created independently to facilitate horizontal expansion.

Take creating a game character as an example:

<?php    
   
    
/** Hero  
 *  英雄接口  
 */    
interface Hero  
{  
    function Create();   
}  
  
/** GuanYu 关羽  
 *  具体英雄类  
 */   
Class GuanYu implements Hero  
{   
    function Create()  
    {  
       echo "关羽加入战场。。。<br/>";  
    }  
}  
  
/** ZhangFei 张飞 
 *  具体英雄类  
 */   
Class ZhangFei implements Hero  
{  
    function Create()  
    {  
       echo "张飞加入战场。。。<br/>";  
    }   
}  
  
  
/** FactoryMethod  
 *  工厂方法接口  
 */  
interface FactoryMethod  
{  
    function CreateHero();  
}  
  
/** GuanYuFactory  
 *  关羽工厂类   
 */  
Class GuanYuFactory implements FactoryMethod  
{  
    function CreateHero()  
    {  
        return new GuanYu();  
    }   
}  
  
/** ZhangFeiFactory  
 *  张飞工厂类  
 */  
Class ZhangFeiFactory implements FactoryMethod  
{  
    function CreateHero()  
    {  
        return new ZhangFei();  
    }   
}

<?php  
// 工厂方式 客户端 index.php  
header("Content-Type:text/html;charset=utf-8");  
  
require_once "FactoryMethod.php";  
  
// 各自调用各自的工厂方法进行创建  
$GYF = new GuanyuFactory();  
$ZFF = new ZhangFeiFactory();  
  
// 调用各自工厂方法的创建英雄方法  
$GuanYu = $GYF->CreateHero();  
$ZhangFei = $ZFF->CreateHero();  
  
// 调用各自创建英雄方法  
$GuanYu->Create();  
$ZhangFei->Create();

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