php静态代理的实例

<?phpclass Printer{public function printSth($str){echo  "第一步 ：之前先把  $str[0]   打残. <br/><br/>";echo "第二步：然后打120把  $str[0]   送进医院.<br/><br/>";echo "第三步：然后出院，然后再执行第一步.";}//..............}class TextShop     //这是一个文印处理店，只文印，卖纸，不照相{private $printer;public function __construct(Printer $printer){$this->printer=$printer;}public function sellPaper()    //卖纸{echo 'give you some paper <br/>';}public function __call($method,$args)     //将代理对象有的功能交给代理对象处理{ if(method_exists($this->printer, $method)) {                         $this->printer->$method($args);                    }}} class PhotoShop   //这是一个照相店,只文印,拍照,不卖纸  {               private $printer;                        public function __construct(Printer $printer) {                $this->printer = $printer;            }                        public function takePhotos() {    //照相                echo 'take photos for you <br>';            }                        public function __call($method, $args) {    //将代理对象有的功能交给代理对象处理                if(method_exists($this->printer, $method)) {                    $this->printer->$method($args);                }            }}        $printer = new Printer();$textShop = new TextShop($printer);$photoShop = new PhotoShop($printer);$textShop->printSth('小张');