从实例中获取从父 class 到子 class 的值

Question

我有一个人 class $name 属性和一个官员 class $officer_name 属性。我需要能够从 class 人那里得到 $name 属性给官员 class。在这种情况下，它应该有 "Major Blake" 的输出。我是否需要创建官员 class 的实例才能回应这一点？

class person {
    protected $name;

    private function set_name($fv_name) {       
        $this->name = $fv_name;
    }

    public function get_name() {        
        return $this->name;
    }

    function __construct($fv_name) {        
        $this->set_name($fv_name);
    }
}

class officer extends person {

    private function give_rank(){
        return "Major ";
    }

    function __construct() {        
        echo $officer_name = $this->give_rank() . parent::get_name();
    }
}

$iv_person = new person("Blake");

Answer 1

请尝试此代码：你的 class :

<?php
class person {
    protected $name;

    private function set_name($fv_name) {       
        $this->name = $fv_name;
    }

    public function get_name() {        
        return $this->name;
    }

    function __construct($fv_name) {        
        $this->set_name($fv_name);
    }
}

class officer extends person {

    private function give_rank(){
        return "Major ";
    }

    function __construct($fv_name) {
        parent::__construct($fv_name);
    }

    function output(){      
        return $this->give_rank().parent::get_name();
    }
}

你的电话：

$iv_person = new officer("Blake");  
echo $iv_person->output();

从实例中获取从父 class 到子 class 的值

Getting values from parent class to child class from an instance

php

oop

inheritance

class

parent-child