????：<?phpclass age{public function how($age=''){return '年齡：'.$age.'<br>';}}class gender{public function what($gender='男'){return '性別：'.$gender.'<br&

<?php

class age

{

public function how($age='')

{

return '年齡：'.$age.'<br>';

}

}

class gender

{

public function what($gender='男')

{

return '性別：'.$gender.'<br>';

}

}

class name

{

private $age=null;

private $gender=null;

public function __construct(age $age,gender $gender)

{

$this->age=$age;

$this->gender=$gender;

}

public function who($name='',$age='',$gender='')

{

return '姓名：'.$name.'<br>'.$this->age->how($age).$this->gender->what($gender);

}

}

$age=new age;

$gender=new gender;

$name=new name($age,$gender);

echo $name->who('小明','28','男士');

echo  '<hr>';

class name1

{

public function who(age $age,gender $gender,$name='',$age1='',$gender1='')

{

return '姓名：'.$name.'<br>'.$age->how($age1).$gender->what($gender1);

}

}

$name=new name1;

echo $name->who($age,$gender,'小王','21','人妖');

?? ???：天蓬老師?? ??：2019-03-28 09:59:09
???? ??：所謂依賴注入, 就是將對象之間的內(nèi)部實例, 提前到類的外部進行, 再通過參數(shù)的注入到其它對象中