接口的概念

<?php //注：接口本身是抽象的，无需加abstractinterface flyer {public function fly($oil,$height);}interface runner{public function run($ci,$d);}interface swim{public function water($f);}//将以上抽象的接口方法集中在一起方法具体化class Super implements flyer,runner,swim{public function fly($oil,$height){        echo 'i can fly';}public function run($ci,$d){        echo 'i can run';}public function water($f){        echo 'i can swim';}}$a=new Super();//实例化接口$a->fly('a','b');//调用接口中的方法fly$a->run('c','d');//调用接口中的方法run$a->water('$ha');//调用接口中的方法water ?>