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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

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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 "

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

利用系统提供的函数来解决,方法如下:

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$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。

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