Question

我有两个班级

class Pet {

    public $pet = null;

    public function setPet(){}

    public function getPet(){}
}

和

class B {

    public $cat = 'cat';
    public $dog = 'bog';

    public function cat()
    {
        $pet = new Pet();
        $pet->pet = $this->cat;
    }

    public function dog()
    {
        $pet = new Pet();
        $pet->pet= $this->dog;
    }
}

我可以得到这个：

$pet = new Pet();
$pet->setPet()->dog();

$pet->getPet(); //dog

Answer 1

我不相信你可以。你可以让B级扩展Pet。这将允许您从类Pet调用函数。阅读对象继承，这可能会有所帮助！ http://php.net/manual/en/language.oop5.inheritance.php

Answer 2

您可以简单地在Class B上扩展Class Pet来调用Pet类中的函数。所以B类继承了Pet的功能。

Class B extends Pet {
    // class B functions here...
}

Answer 3

我在这里写下我的代码时笑了。

<?php

class Pet {
        public $name;
        public function setName($string) {
            $this->name = $string;
        }
        public function getName() {
            return $this->name;
        }
}

class Dog extends Pet {
        public function bark() {
            echo "Arf arf!";
        }
}

class Cat extends Pet {
        public function meow() {
            echo "Meoooww~ purrr~";
        }
}

$dog = new Dog();
$dog->setName("Jacob");
$dog->bark(); //Arf arf!
echo "Good job, ".$dog->getName()."!"; //Good job, Jacob!

?>

先生你不能用$pet->setPet()->dog()调用->dog()，因为setPet（）是一个函数而不是一个对象..就像他们说的那样，对你的代码做正确的事情是将它扩展为超类并将Dog Class声明为子类..

Answer 4

我的变种

class Pet {

public $pet = null;

public function setPet($pet = null)
{
    if (is_null($pet)) {
        return new B($this);
    } else {
        $this->pet = $pet;
        return $this;
    }
}

public function getPet()
{
    return $this->pet;
}
}

class B {

protected $pet = null;
protected $cat = 'cat';
protected $dog = 'bog';

public function __construct(Pet $pet)
{
    $this->pet = $pet;
}

public function cat()
{
    $this->pet->setPet($this->cat);
    return $this->pet;
}

public function dog()
{
    $this->pet->setPet($this->dog);
    return $this->pet;        
}
}

$pet = new Pet();
$pet->setPet()->cat();
var_dump($pet->getPet());

如何从另一个类方法获取方法

4 个答案: