摘要： 多态类 "; } } class Taxi implements Car{ public function say(){ echo "出租车".""; } } function say($obj){ if($obj instanceof Car){ $obj->say(); } ... 阅读全文

摘要： 多态性 "; } } class Bus extends Car{ public function say(){ echo "公交车".""; } } function say($obj ){ if($obj instanceof Car){ $obj->say(); } } ... 阅读全文