多态-II（接口实现） 

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>多态类</title>
	</head>
	<body>
		<?php  
			interface Car{
				public function say();
			}
			class Bus implements Car{
				public function say(){
					echo "公交车"."<br>";
				}
			}
			class Taxi implements Car{
				public function say(){
					echo "出租车"."<br>";
				}
			}
			function say($obj){
				if($obj instanceof Car){
					$obj->say();
				}
			}
			$bus=new Bus();
			$taxi=new Taxi();
			say($bus);	//输出“公交车”
			say($taxi);	//输出“出租车”
		?>
	</body>
</html>

 

posted @ 2016-07-18 17:14  寻觅beyond  阅读(158)  评论(0)  编辑  收藏  举报
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