总结多维php数组中的值 [英] Sum up values in multidimensional php array

问题描述

我试图弄清楚如何处理我的数组以对其值进行一些数学运算". 该数组看起来类似于:

I try to figure out how to handle my array to do "some math" with its values. The array looks similar to this:

Array
(
[0] => Array
    (
        [person1] => 71
        [person2] => 49
        [person3] => 15
    )

[1] => Array
    (
        [person1] => 56
        [person3] => 43
        [person4] => 21
        [person5] => 9
        [person6] => 7
    )

...

)

每个值应除以总量: 因此，第一个值应为71/(71 + 49 + 15)= 0.526或52.6％.

Each value should be divided by the total amount: The first value should therefore be 71/(71+49+15)=0.526 or 52.6%.

值应四舍五入到小数点后三位.有人可以给我提供array_walk(或foreach)函数吗?我只是想不通.

The values should be rounded to 3 decimal places. Can someone provide me with an array_walk (or foreach) function? I just can't figure it out.

最终数组应如下所示:

Array
(
[0] => Array
    (
        [person1] => 52.6%
        [person2] => 36.3%
        [person3] => 11.1%
    )

[1] => Array
    (
        [person1] => 41.2%
        [person3] => 31.6%
        [person4] => 15.4%
        [person5] => 6.6%
        [person6] => 5.1%
    )

...

)

谢谢！

推荐答案

假定$arr是您的初始数组，而$new_arr将是新数组.

Assuming $arr is your initial array, and $new_arr will be the new one.

$new_arr = array();
foreach ($arr as $i=>$ar)
    foreach ($ar as $j=>$a)
        $new_arr[$i][$j] = round(($a/array_sum($ar))*100, 1);

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