<?php/*桥接模式：将抽象部分与实现部分分离，使它们都可以独立的变化。 *  * 在软件系统中，某些类型由于自身的逻辑，它具有两个或多个维度的变化,桥接模式就是应对这种多维度的变化 *//*例子：不同的车在不同的街道上行驶。车可变，街道可变 *  *  */abstract class road{	abstract public function run();}class quickroad extends road{	public $car;		public function __construct($car){		$this->car = $car;	}		public function run(){		$this->car->run();		echo ‘高速公路上行驶‘;	}}class street extends road{	public $car;		public function __construct($car){		$this->car = $car;	}		public function run(){		$this->car->run();		echo ‘城市街道上行驶‘;	}}abstract class car{	abstract public function run();}class jeep extends car{	public function run(){		echo ‘吉普车在‘;	}}class bus extends car{	public function run(){		echo ‘公共汽车在‘;	}}$car = new bus();$road = new quickroad($car);$road->run();echo "<br/>";$car = new jeep();$road = new street($car);$road->run();?>