简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > php教程 > php手册 > body text

php中重写理解

WBOY
Release： 2016-06-21 08:47:28
Original
1017 people have browsed it

我们经常听到面向对象的三大特性:封装、继承、多态，但是还有许多特性，那么我们是否记得重写呢？在学习的时候简单的记录了下php中等重写方法：

1）先通过例子看下，这样更加明了


//定义父类（也可以称为基类）
class Goods {
public $goods_name = 'Goods:name';

public function sayName() {
echo $this->goods_name;
}

}
//定义子类（也可以成为扩展类）
class Book extends Goods {
public $goods_name='Book:name';
public function sayName() {
echo 'run in book';
}
}
//实例化对象
$b1 = new Book;

//输出run in book，因为子类重写了父类的sayName()方法
$b1->sayName();

下章总结下php中的重写调用...



Related labels：
php
source：php.cn
Previous article：thinkphp 分页类介绍 Next article：php中的static
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
PHP arrays obtained from URL parameters do not behave as expected I have a URL parameter that contains the category ID and I want to treat it as an array li...
From 2024-04-06 22:09:02
0
1
1428
Where should I place CustomLog directive in apache I'm using php:7.2-apachedocker. I need to disable health check url login access log. Based...
From 2024-04-06 22:03:59
0
1
990
What is the format of the variables in the return value? I am a new learner of php. I found a piece of code: if($x<time()){return[false,'error']...
From 2024-04-06 21:55:20
0
1
778
Problems encountered when using opentbs to generate odt files: values ​​of the same key are displayed in the same row instead of separate columns. I'm using a library called OpenTbs to create odt using PHP, I'm using it because columns a...
From 2024-04-06 20:18:18
0
1
483
Group MySQL results by ID for looping over I have a table with flight data in mysql. I'm writing a php code that will group and displ...
From 2024-04-06 17:27:56
0
1
406
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！