PHP method to double the value (number) of each cell in a multi-dimensional array_PHP tutorial

How to double the value (number) of each cell in a multi-dimensional array in php

This article mainly introduces how to double the value (number) of each cell in a multi-dimensional array in php The method of doubling involves the skills of operating arrays in PHP. Friends who need it can refer to it

The example in this article describes the method of doubling the value (number) of each cell in a multi-dimensional array in PHP. Share it with everyone for your reference. The specific analysis is as follows:

Premise: A multi-dimensional array, each of its smallest unit values ​​is a number.
Requirement: Write a function that doubles the smallest cell value.

The code is as follows

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$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7)); function arr2($arr){ foreach($arr as $key=>$v){ if(!is_array($v)){ $arr[$key] *= 2; }else{ $arr[$key] = arr2($arr[$key]); } } return $arr; } echo " "; print_r(arr2($arr)); ?>

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$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7)); function t(&$arr){ $arr *= 2; } echo " "; array_walk_recursive($arr,'t'); print_r($arr); ?>

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$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7)); function arr2($arr){

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

if(!is_array($v)){ $arr[$key] *= 2; }else{ $arr[$key] = arr2($arr[$key]); } } return $arr; } echo "

";
            print_r(arr2($arr));
            ?>
            
            

Use the functions provided by the system to solve the problem. The method is as follows: ?

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<🎜>$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7)); function t(&$arr){ $arr *= 2; } echo " "; array_walk_recursive($arr,'t'); print_r($arr); ?>

I hope this article will be helpful to everyone’s PHP programming design. http://www.bkjia.com/PHPjc/966907.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/966907.htmlTechArticlephp method to double the value (number) of each cell in a multi-dimensional array. This article mainly introduces the php implementation The method of doubling the value (number) of each cell in a multi-dimensional array involves PHP array manipulation skills...