外观模式的作用

<?php
//关闭和开启网站 
class webSet{
public function start(){
echo '开启网站......';
}
public function stop(){
echo '关闭网站......';
}
}
//关闭开启博客 
class blogSet{
public function start(){
echo '开启博客......';
}
public function stop(){
echo '关闭博客......';
}
}
//关闭开启注册
class registerSet{
public function start(){
echo '开启注册......';
}
public function stop(){
echo '关闭注册......';
}
}
//门面类
class Facade{
//网站设置对象
private $webSet;
//博客设置对象
private $blogSet;
//注册功能设置对象
private $registerSet;
public function __construct(){
$this->webSet        = new webSet();
$this->blogSet       = new blogSet();
$this->registerSet   = new registerSet();
}
//设置共开关 - 开
public function turnOn(){
$this->webSet->start();
$this->blogSet->start();
$this->registerSet->start();
}
//设置共开关 - 关
public function turnOff(){
$this->webSet->stop();
$this->blogSet->stop();
$this->registerSet->stop();
}
}
//调用
$Facade = new Facade();
$Facade->turnOn();