search
Homephp教程php手册php实现多维数组中每个单元值(数字)翻倍的方法

php实现多维数组中每个单元值(数字)翻倍的方法

Jun 13, 2016 am 09:12 AM
phpvalueunitmultidimensionalaccomplishnumberarraymethodofDouble

php实现多维数组中每个单元值(数字)翻倍的方法

 这篇文章主要介绍了php实现多维数组中每个单元值(数字)翻倍的方法,涉及php操作数组的技巧,需要的朋友可以参考下

 

 

本文实例讲述了php实现多维数组中每个单元值(数字)翻倍的方法。分享给大家供大家参考。具体分析如下:

前提:一个多维数组,它的每个最小单元值都为数字。
要求:写一个函数,将最小单元值翻倍。

代码如下

?

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7));

function arr2($arr){

foreach($arr as $key=>$v){

if(!is_array($v)){

$arr[$key] *= 2;

}else{

$arr[$key] = arr2($arr[$key]);

}

}

return $arr;

}

echo "

";
            <p>print_r(arr2($arr));</p>
            <p>?></p>
            
            

利用系统提供的函数来解决,方法如下:

?

1

2

3

4

5

6

7

8

9

$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7));

function t(&$arr){

$arr *= 2;

}

echo "

";
            <p>array_walk_recursive($arr,'t');</p>
            <p>print_r($arr);</p>
            <p>?></p>
            
            

希望本文所述对大家的php程序设计有所帮助。

Statement
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 AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools