abstract：<?phpclass Girl{  public function hobby(){return '逛街';}}class boy{   public function buy(Girl $girl)  {  return '女朋友'.$girl->hobby();  }}$girl = new

<?php

class Girl

{

  public function hobby()

{

return '逛街';

}

}

class boy

{

   public function buy(Girl $girl)

  {

  return '女朋友'.$girl->hobby();

  }

}

$girl = new Girl;

$boy = new boy();

echo $boy->buy($girl);

Correcting teacher：查無此人Correction time：2019-05-06 09:32:06
Teacher's summary：完成的不錯(cuò)，下次把代碼寫整齊。繼續(xù)加油。