Home Backend Development PHP Tutorial 学习php 类,遇到一个基础有关问题,求好心人解答

学习php 类,遇到一个基础有关问题,求好心人解答

Jun 13, 2016 pm 12:00 PM
function nbsp public this

学习php 类,遇到一个基础问题,求好心人解答。

本帖最后由 zxm_99 于 2014-06-23 23:16:05 编辑 代码如下图,蓝色执行显示1,红色显示6 ,需要的是显示6;

请问bbb()中怎么才能使用aaa()中的$c呢?只有通过红色框中那方法吗?(感觉好麻烦)
如果不用红色框中那样的方法,但aaa()中有很多个$c这样的变量,这些变量在bbb()中需要用到,该怎么办?
------解决方案--------------------
你的 bbb 方法中的这句
    $c = $c + 1;
会有一个 Notice:  Undefined variable: c 警告 ($c 没有定义就取值了)
虽然你屏蔽了 E_NOTICE 级别的错误信息,但并不表示不存在问题。尽管在这里无碍大局

class ceshi {<br />  public function aaa($a) {<br />    $this->c = $a;<br />    $r = $this->bbb();<br />    echo $r;<br />  }<br />  public function bbb() {<br />    $c = $this->c + 1;<br />    return $c;<br />  }<br />}<br />$xyz = new ceshi;<br />$xyz->aaa(5);
Copy after login

这样就输出 6 了


------解决方案--------------------
<br /><br />//使用类的属性<br />class ceshi {<br />private $c;<br />  public function aaa($a) {<br />    $this->c = $a;<br />    echo $this->bbb();<br />  }<br />  public function bbb() {<br />    return $this->c + 1;<br />  }<br />}<br />$xyz = new ceshi;<br />$xyz->aaa(5);<br /><br /><br />
Copy after login

------解决方案--------------------
使用類屬性變量就可以了。

private $c; 再類中任何function都可以調用到。

<br />class ceshi{<br /><br />	private $c;<br /><br />	public function aaa($a){<br />		$this->c = $a;<br />		$k = $this->bbb();<br />		echo $k;<br />	}<br /><br />	public function bbb(){<br />		$this->c = $this->c + 1;<br />		return $this->c;<br />	}<br />}<br /><br />$xyz = new ceshi;<br />$xyz->aaa(5);<br />
Copy after login
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

Hot Article Tags

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Solution: Your organization requires you to change your PIN Solution: Your organization requires you to change your PIN Oct 04, 2023 pm 05:45 PM

Solution: Your organization requires you to change your PIN

How to adjust window border settings on Windows 11: Change color and size How to adjust window border settings on Windows 11: Change color and size Sep 22, 2023 am 11:37 AM

How to adjust window border settings on Windows 11: Change color and size

How to change title bar color on Windows 11? How to change title bar color on Windows 11? Sep 14, 2023 pm 03:33 PM

How to change title bar color on Windows 11?

How to enable or disable taskbar thumbnail previews on Windows 11 How to enable or disable taskbar thumbnail previews on Windows 11 Sep 15, 2023 pm 03:57 PM

How to enable or disable taskbar thumbnail previews on Windows 11

OOBELANGUAGE Error Problems in Windows 11/10 Repair OOBELANGUAGE Error Problems in Windows 11/10 Repair Jul 16, 2023 pm 03:29 PM

OOBELANGUAGE Error Problems in Windows 11/10 Repair

Display scaling guide on Windows 11 Display scaling guide on Windows 11 Sep 19, 2023 pm 06:45 PM

Display scaling guide on Windows 11

10 Ways to Adjust Brightness on Windows 11 10 Ways to Adjust Brightness on Windows 11 Dec 18, 2023 pm 02:21 PM

10 Ways to Adjust Brightness on Windows 11

How to turn off private browsing authentication for iPhone in Safari? How to turn off private browsing authentication for iPhone in Safari? Nov 29, 2023 pm 11:21 PM

How to turn off private browsing authentication for iPhone in Safari?

See all articles