<?php
/** 命令模式：（行为模式）将一个请求封装成一个对象（命令封装成对象），从而可以使用不同的请求对客户参数化(客户的不同请求，调不同的封装对象)，* 对请求排序，或者记录请求日志，以及支持可取消的操作* 1 命令接口：声明执行方法2 发起者 ： 记录、撤销请求，请求命令执行3 接受者 ： 命令的具体实现角色。4 具体命令： 包含接受者，调用接受者执行。*///具体做事情的角色，接受者
class Receiver{public $name;public function __construct($name){$this->name = $name;}public function action(){echo $this->name.'跳大';}public function action1(){echo $this->name.'防御';}public function action2(){echo $this->name.'治疗';}
}//命令接口
interface Command{public function execute();
}//具体的三个命令，包含一个接受者，调用接受者去做
class Command1 implements Command{public $receiver;public function __construct($receiver){$this->receiver = $receiver;}public function execute(){$this->receiver->action();}
}class Command2 implements Command{public $receiver;public function __construct($receiver){$this->receiver = $receiver;}public function execute(){$this->receiver->action1();}
}class Command3 implements Command{public $receiver;public function __construct($receiver){$this->receiver = $receiver;}public function execute(){$this->receiver->action2();}
}//命令发起者,记录,删除命令,请求执行命令
class Invoker{public $command = array();public function setCommand($command){$this->command[] = $command;}public function executeCommand(){//请求执行foreach ($this->command as $key=>$value){$value->execute();echo "<br/>";}}public function removeCommand($command){$key = array_search($command, $this->command);if($key!==false){unset($this->command[$key]);}}
}/** 请求流程：先实例化接受者（具体做事的角色），然后实例化命令。* 接着实例化一个请求者，请求者注册命令，请求执行命令*/
$role1 = new Receiver('盖伦');
$role2 = new Receiver('皇子');$command1 = new Command1($role2);
$command2 = new Command2($role1);$invoker = new Invoker();
$invoker->setCommand($command1);
$invoker->setCommand($command2);$invoker->executeCommand();
?>