php设计模式 Facade(外观模式)

class car {
public function start() {
print_r("车子启动");
}
public function check_stop() {
print_r("刹车检查正常");
}
public function check_box() {
print_r("检查油箱正常");
}
public function check_console() {
print_r("检查仪表盘是否异常");
}
}

//facade模式
class carfacade {
public function catgo(car $carref){
$carref->check_stop();
$carref->check_box();
$carref->check_console();
$carref->start();
}
}
//客户端可以简单的去调用。
$car = new car();
$carobj = new carfacade();
$carobj->catgo($car);

<?php
/**
* 外观模式 示例
*
* 为子系统中的一组接口提供一个一致的界面,定义一个高层接口,使得这一子系统更加的容易使用
*/
class subsytem1
{
public function method1()
{
echo "subsystem1 method1<br/>";
}
}

class subsytem2
{
public function method2()
{
echo "subsystem2 method2<br/>";
}
}

class subsytem3
{
public function method3()
{
echo "subsystem3 method3<br/>";
}
}

class facade
{
private $_object1 = null;
private $_object2 = null;
private $_object3 = null;

public function __construct()
{
$this->_object1 = new subsytem1();
$this->_object2 = new subsytem2();
$this->_object3 = new subsytem3();
}

public function methoda() {
echo "facade methoda<br/>";
$this->_object1->method1();
$this->_object2->method2();
}

public function methodb() {
echo "facade methodb<br/>";
$this->_object2->method2();
$this->_object3->method3();
}
}

// 实例化
$objfacade = new facade();

$objfacade->methoda();
$objfacade->methodb();