责任链模式

<?php
/** 
 * Created by PhpStorm. 
 * User: Jang 
 * Date: 2015/6/11 
 * Time: 10:16 
 */  
  
//申请Model  
class Request  
{  
    //数量  
    public $num;  
    //申请类型  
    public $requestType;  
    //申请内容  
    public $requestContent;  
}  
  
//抽象管理者  
abstract class Manager  
{  
    protected $name;  
    //管理者上级  
    protected $manager;  
    public function __construct($_name)  
    {  
        $this->name = $_name;  
    }  
  
    //设置管理者上级  
    public function SetHeader(Manager $_mana)  
    {  
        $this->manager = $_mana;  
    }  
  
    //申请请求  
    abstract public function Apply(Request $_req);  
  
}  
  
//经理  
class CommonManager extends Manager  
{  
    public function __construct($_name)  
    {  
        parent::__construct($_name);  
    }  
    public function Apply(Request $_req)  
    {  
        if($_req->requestType=="请假" && $_req->num<=2)  
        {  
            echo "{$this->name}:{$_req->requestContent} 数量{$_req->num}被批准。<br/>";  
        }  
        else  
        {  
            if(isset($this->manager))  
            {  
                $this->manager->Apply($_req);  
            }  
        }  
  
    }  
}  
  
//总监  
class MajorDomo extends Manager  
{  
    public function __construct($_name)  
    {  
        parent::__construct($_name);  
    }  
  
    public function Apply(Request $_req)  
    {  
        if ($_req->requestType == "请假" && $_req->num <= 5)  
        {  
            echo "{$this->name}:{$_req->requestContent} 数量{$_req->num}被批准。<br/>";  
        }  
        else  
        {  
            if (isset($this->manager))  
            {  
                $this->manager->Apply($_req);  
            }  
        }  
  
    }  
}  
  
  
//总经理  
class GeneralManager extends Manager  
{  
    public function __construct($_name)  
    {  
        parent::__construct($_name);  
    }  
  
    public function Apply(Request $_req)  
    {  
        if ($_req->requestType == "请假")  
        {  
            echo "{$this->name}:{$_req->requestContent} 数量{$_req->num}被批准。<br/>";  
        }  
        else if($_req->requestType=="加薪" && $_req->num <= 500)  
        {  
            echo "{$this->name}:{$_req->requestContent} 数量{$_req->num}被批准。<br/>";  
        }  
        else if($_req->requestType=="加薪" && $_req->num>500)  
        {  
            echo "{$this->name}:{$_req->requestContent} 数量{$_req->num}再说吧。<br/>";  
        }  
    }  
}