如何彙總多維數組的列在PHP

Question

我有一個像

Array 
(
    [A1] => Array 
     (
      [1] => 1 
      [2] => 0 
      [3] => 0 
      [4] => 0 
      [5] => 0 
      [6] => 0 
      [7] => 0 
      [8] => 0 
      [9] => 0 
      [10] => 0 
     ) 
     [A2] => Array 
     (
      [1] => 1 
      [2] => 1 
      [3] => 0 
      [4] => 0 
      [5] => 0 
      [6] => 0 
      [7] => 0 
      [8] => 0 
      [9] => 0 
      [10] => 0 
     ) 
     [A3] => Array 
     (
      [1] => 0 
      [2] => 0 
      [3] => 0 
      [4] => 0 
      [5] => 0 
      [6] => 0 
      [7] => 0 
      [8] => 0 
      [9] => 0 
      [10] => 0 
     ) 
) 

我想補充逐列的數組。

我想這樣回答：

[sum] => Array 
    (
     [1] => 2 
     [2] => 1 
     [3] => 0 
     [4] => 0 
     [5] => 0 
     [6] => 0 
     [7] => 0 
     [8] => 0 
     [9] => 0 
     [10] => 0 
    ) 

有任何數組函數在PHP這樣做嗎？否則我該如何做到這一點？

Answer 1

總是有自定義代碼：

function array_sum_rows($arr) { 
    $out = array(); 
    foreach ($arr as $row) { 
     foreach ($row as $i => $val) { 
      $out[$i] = isset($out[$i]) ? $out[$i] + $val : $val; 
     } 
    } 
    return $out; 
} 

Answer 2

$multiArray = ... //your array 
$sumArray = array(); 
$i = 1; 

foreach ($multiArray as $key => $array) { 
    $sumArray[$i] = array_sum($array); 
    $i++; 
} 

這將適用於您的數組。你會得到一個數組

http://php.net/manual/en/function.array-sum.php

Answer 3

不幸的是失去對置的實際指數：

function array_transpose($arr) { 
    return call_user_func_array(
     'array_map', 
     array_merge(
      array(NULL), 
      $arr 
     ) 
    ); 
} 

$transposedArray = array_transpose($myData); 
$result = array_map('array_sum', $transposedArray); 
var_dump($result); 

但是，索引可以通過

恢復

$result = array_combine(array_keys(end($myData)), $result);