PHP编程：学习php设计模式 php实现门面模式（Facade）

<?php
class Camera {
 
 /**
  * 打开录像机
  */
 public function turnOn() {
  echo 'Turning on the camera.<br />';
 }
 
 /**
  * 关闭录像机
  */
 public function turnOff() {
  echo 'Turning off the camera.<br />';
 }
 
 /**
  * 转到录像机
  * @param <type> $degrees
  */
 public function rotate($degrees) {
  echo 'rotating the camera by ',$degrees,' degrees.<br />';
 }
}
 
class Light {
 
 /**
  * 开灯
  */
 public function turnOn() {
  echo 'Turning on the light.<br />';
 }
 
 /**
  * 关灯
  */
 public function turnOff() {
  echo 'Turning off the light.<br />';
 }
 
 /**
  * 换灯泡
  */
 public function changeBulb() {
  echo 'changing the light-bulb.<br />';
 }
}
 
class Sensor {
 
 /**
  * 启动感应器
  */
 public function activate() {
  echo 'Activating the sensor.<br />';
 }
 
 /**
  * 关闭感应器
  */
 public function deactivate() {
  echo 'Deactivating the sensor.<br />';
 }
 
 /**
  * 触发感应器
  */
 public function trigger() {
  echo 'The sensor has been trigged.<br />';
 }
}
 
class Alarm {
 
 /**
  * 启动警报器
  */
 public function activate() {
  echo 'Activating the alarm.<br />';
 }
 
 /**
  * 关闭警报器
  */
 public function deactivate() {
  echo 'Deactivating the alarm.<br />';
 }
 
 /**
  * 拉响警报器
  */
 public function ring() {
  echo 'Ring the alarm.<br />';
 }
 
 /**
  * 停掉警报器
  */
 public function stopRing() {
  echo 'Stop the alarm.<br />';
 }
}
 
/**
 * 门面类
 */
class SecurityFacade {
 
 /* 录像机 */
 private $_camera1,$_camera2;
 
 /* 灯 */
 private $_light1,$_light2,$_light3;
 
 /* 感应器 */
 private $_sensor;
 
 /* 警报器 */
 private $_alarm;
 
 public function __construct() {
  $this->_camera1 = new Camera();
  $this->_camera2 = new Camera();
 
  $this->_light1 = new Light();
  $this->_light2 = new Light();
  $this->_light3 = new Light();
 
  $this->_sensor = new Sensor();
  $this->_alarm = new Alarm();
 }
 
 public function activate() {
  $this->_camera1->turnOn();
  $this->_camera2->turnOn();
 
  $this->_light1->turnOn();
  $this->_light2->turnOn();
  $this->_light3->turnOn();
 
  $this->_sensor->activate();
  $this->_alarm->activate();
 }
 
 public function deactivate() {
  $this->_camera1->turnOff();
  $this->_camera2->turnOff();
 
  $this->_light1->turnOff();
  $this->_light2->turnOff();
  $this->_light3->turnOff();
 
  $this->_sensor->deactivate();
  $this->_alarm->deactivate();
 }
}
 
 
/**
 * 客户端
 */
class Client {
 
 private static $_security;
  /**
  * Main program.
  */
 public static function main() {
  self::$_security = new SecurityFacade();
  self::$_security->activate();
 }
}
 
Client::main();
?>