class CPU {
 public void freeze() { ... }
 public void jump(long position) { ... }
 public void execute() { ... }
}
class Memory {
 public void load(long position, byte[] data) {
  ...
 }
}
class HardDrive {
 public byte[] read(long lba, int size) {
  ...
 }
}

class Computer {
 public void startComputer() {
  cpu.freeze();
  memory.load(BOOT_ADDRESS, hardDrive.read(BOOT_SECTOR, SECTOR_SIZE));
  cpu.jump(BOOT_ADDRESS);
  cpu.execute();
 }
}

class You {
 public static void main(String[] args) {
  Computer facade = new Computer();
  facade.startComputer();
 }
}

interface SendMailInterface
{
 public function setSendToEmailAddress($emailAddress);
 public function setSubjectName($subject);
 public function setTheEmailContents($body);
 public function setTheHeaders($headers);
 public function getTheHeaders();
 public function getTheHeadersText();
 public function sendTheEmailNow();
}
class SendMail implements SendMailInterface
{
 public $to, $subject, $body;
 public $headers = array();
 
 public function setSendToEmailAddress($emailAddress)
 {
  $this->to = $emailAddress;
 }
 public function setSubjectName($subject)
 {
  $this->subject = $subject;
 }
 public function setTheEmailContents($body)
 {
  $this->body = $body;
 }
 public function setTheHeaders($headers)
 {
  $this->headers = $headers;
 }
 public function getTheHeaders()
 {
  return $this->headers;
 }
 public function getTheHeadersText()
 {
  $headers = "";
  foreach ($this->getTheHeaders() as $header) {
   $headers .= $header . "\r\n";
  }
 }
 
 public function sendTheEmailNow()
 {
  mail($this->to, $this->subject, $this->body, $this->getTheHeadersText());
 }
}

class SendMailFacade
{
 private $sendMail;
 public function __construct(SendMailInterface $sendMail)
 {
  $this->sendMail = $sendMail;
 }
 public function setTo($to)
 {
  $this->sendMail->setSendToEmailAddress($to);
  return $this;
 }
 public function setSubject($subject)
 {
  $this->sendMail->setSubjectName($subject);
  return $this;
 }
 public function setBody($body)
 {
  $this->sendMail->setTheEmailContents($body);
  return $this;
 }
 public function setHeaders($headers)
 {
  $this->sendMail->setTheHeaders($headers);
  return $this;
 }
 public function send()
 {
  $this->sendMail->sendTheEmailNow();
 }
}
 

$sendMail = new SendMail();
$sendMail->setSendToEmailAddress($to);
$sendMail->setSubjectName($subject);
$sendMail->setTheEmailContents($body);
$sendMail->setTheHeaders($headers);
$sendMail->sendTheEmailNow();

$sendMail  = new SendMail();
$sendMailFacade = new sendMailFacade($sendMail);
$sendMailFacade->setTo($to)->setSubject($subject)->setBody($body)->setHeaders($headers)->send();

$productID = $_GET['productId']; 
$qtyCheck = new productQty();

 // 檢查庫(kù)存
if($qtyCheck->checkQty($productID) > 0) {
  
 // 添加商品到購(gòu)物車
 $addToCart = new addToCart($productID);
  
 // 計(jì)算運(yùn)費(fèi)
 $shipping = new shippingCharge();
 $shipping->updateCharge();
  
 // 計(jì)算打折
 $discount = new discount();
 $discount->applyDiscount();
  
 $order = new order();
 $order->generateOrder();
}

class productOrderFacade {
 public $productID = '';  
 public function __construct($pID) {
  $this->productID = $pID;
 }
 public function generateOrder() {   
  if($this->qtyCheck()) {
   $this->addToCart();
   $this->calulateShipping();
   $this->applyDiscount();
   $this->placeOrder();
  }   
 }
 private function addToCart () {
  /* .. add product to cart .. */
 } 
 private function qtyCheck() {
  $qty = 'get product quantity from database';
  if($qty > 0) {
   return true;
  } else {
   return true;
  }
 }
  private function calulateShipping() {
  $shipping = new shippingCharge();
  $shipping->calculateCharge();
 }
 private function applyDiscount() {
  $discount = new discount();
  $discount->applyDiscount();
 }
 private function placeOrder() {
  $order = new order();
  $order->generateOrder();
 }
}

$order = new productOrderFacade($productID);
$order->generateOrder();

// 發(fā)Twitter消息
class CodeTwit {
 function tweet($status, $url)
 {
 var_dump('Tweeted:'.$status.' from:'.$url);
 }
}
// 分享到Google plus上
class Googlize {
 function share($url)
 {
 var_dump('Shared on Google plus:'.$url);
 }
}
//分享到Reddit上
class Reddiator {
 function reddit($url, $title)
 {
 var_dump('Reddit! url:'.$url.' title:'.$title);
 }
}

class shareFacade {
 
 protected $twitter; 
 protected $google; 
 protected $reddit; 
 function __construct($twitterObj,$gooleObj,$redditObj)
 {
 $this->twitter = $twitterObj;
 $this->google = $gooleObj;
 $this->reddit = $redditObj;
 } 
 function share($url,$title,$status)
 {
 $this->twitter->tweet($status, $url);
 $this->google->share($url);
 $this->reddit->reddit($url, $title);
 }
}

$shareObj = new shareFacade($twitterObj,$gooleObj,$redditObj);
$shareObj->share('//myBlog.com/post-awsome','My greatest post','Read my greatest post ever.');