简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW)
Home > Backend Development > PHP Tutorial > body text

方法重载和重写的区别，方法重载重写区别_PHP教程

php.cn
Release： 2016-07-12 08:53:56
Original
1861 people have browsed it

方法重载和重写的区别，方法重载重写区别

答一： 根本区别：
重写（重构）很直观啊，子类覆盖了父类的同名同参同返回值的方法，用子类调用的只会是重写的方法
重载，同名而已。     答二： 1、重载:
方法名相同，参数列表不同
2、重写：
也叫覆盖，指在子类中定义一个与父类中方法同名同参数列表的方法。因为子类会继承父类的方法，而重写就是将从父类继承过来的方法重新定义一次，重新填写方法中的代码。    
答三：   
重写是子类的方法覆盖父类的方法，要求方法名和参数都相同

重载是在同一个类中的两个或两个以上的方法，拥有相同的方法名，但是参数却不相同，方法体也不相同，最常见的重载的例子就是类的构造函数，可以参考API帮助文档看看类的构造方法



Copy after login
答四：
1.重写必须继承，重载不用。
2.重写的方法名，参数数目相同，参数类型兼容，重载的方法名相同，参数列表不同。
3.重写的方法修饰符大于等于父类的方法，重载和修饰符无关。
4.重写不可以抛出父类没有抛出的一般异常，可以抛出运行时异常

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1122389.htmlTechArticle方法重载和重写的区别，方法重载重写区别 答一： 根本区别： 重写（重构）很直观啊，子类覆盖了父类的同名同参同返回值的方法，用子...
Related labels：
Method overriding
source：php.cn
Previous article：php构造函数与析构函数，php构造函数_PHP教程 Next article：MordenPHP阅读笔记（一）——先跑再说，跑累了再走，mordenphp先跑_PHP教程
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 [email protected]
Latest Articles by Author
Latest Issues
function_exists() cannot determine the custom function Function test () {return true;} if (function_exists ('test')) {echo "test is function...
From 2024-04-29 11:01:01
0 1 359
How to display the mobile version of Google Chrome Hello teacher, how can I change Google Chrome into a mobile version?
From 2024-04-23 00:22:19
0 6 451
The child window operates the parent window, but the output does not respond. The first two sentences are executable, but the last sentence cannot be implemented.
From 2024-04-19 15:37:47
0 1 450
There is no output in the parent window document.onclick = function(){ window.opener.document.write('I am the output of the child ...
From 2024-04-18 23:52:34
0 0 312
Where is the courseware about CSS mind mapping? Courseware
From 2024-04-16 10:10:18
0 0 404
PX automatic conversion to REM error  <style>html {   font-size: calc(100vw / 3.75);      }...
From 2024-04-16 09:34:16
0 0 3990
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 1 722
Move the content to the left by adding the Width property I have provided margins to the body. main {left margin: 200px; right margin: 200px; text a...
From 2024-04-06 22:01:35
0 3 520
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 1 604
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 1 398
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！