找到数组值的总和[关闭]

i have a 3 dimensional array example

arr[a][h][x] = 12
arr[a][p][x] = 12
arr[d][r][z] = 15
arr[a][f][x] = 12
arr[a][u][x] = 12
arr[b][q][y] = 19
arr[e][h][n] = 16
arr[f][h][n] = 14
---
---

using PHP, i need to find the sum of

arr[a][ANY][x]=?

where ANY - can have any value

( arr[a][p][x] + arr[a][h][x] + arr[a][f][x]+... )

also i need to find the sum of

arr[ANY][h][n]=?

Can anybody help me?

Thanks in advance

<?php
    $sum1 = 0;
    $sum2 = 0;  
    foreach($array['a'] AS $smallArray){
      $sum1 += $smallArray['x'];
    }

    foreach($array AS $smallArray){
      $sum2 += $smallArray['h']['n'];
    }

 $sum = 0;
 foreach ($arr['a'] as $a) {
      if (isset($a['x'])) {
           $sum += $a['x'];
      }
 }

That will work for the first one. A variation on that will work for the second one.