命令模式和php实现 php几种运行模式

<?php
header("Content-type:text/html;Charset=utf-8");
//命令接口，定义具体命令接口要实现的执行函数
interface Command{
    function execute();
}
//具体命令角色AttackCommand,指定接受者执行攻击命令
class AttackCommand implements Command{
    private $receiver;
    function __construct(Receiver $receiver){
        $this->receiver = $receiver;
    }
    function execute(){
        $this->receiver->attackAction();
    }
}
//具体命令角色DefenseCommand,指定接受者执行防御命令
class DefenseCommand implements Command{
    private $receiver;
    function __construct(Receiver $receiver){
        $this->receiver = $receiver;
    }
    function execute(){
        $this->receiver->defenseAction();
    }
}
//接受者，执行具体命令角色的命令
class Receiver{
    private $name;
    function __construct($name){
        $this->name = $name;
    }
    function attackAction(){
        echo $this->name."执行了攻击命令";
    }
    function defenseAction(){
        echo $this->name."执行了防御命令";
    }
}
//请求者，请求具体命令的执行
class Invoker{
    private $concreteCommand;
    function __construct($concreteCommand){
        $this->concreteCommand = $concreteCommand;
    }
    function executeCommand(){
        $this->concreteCommand->execute();
    }
}

//客户端角色
class Client{
    function __construct(){
        $receiverZhao = new Receiver("赵日天");
        $attackCommand = new AttackCommand($receiverZhao);
        $attackInvoker = new Invoker($attackCommand);
        $attackInvoker->executeCommand();

        $receiverYe = new Receiver("叶良辰");
        $defenseCommand = new DefenseCommand($receiverYe);
        $defenseInvoker = new Invoker($defenseCommand);
        $defenseInvoker->executeCommand();
    }
}

//测试：
new Client();