子数组值的总和 [英] Sum of subarray values

问题描述

Array
(
    [1~course2 20:00] => Array
        (
            [0] => Array
                (
                    [pid] => 30
                    [anz_tn] => 6
                )

            [1] => Array
                (
                    [pid] => 30
                    [anz_tn] => 4
                )

            [2] => Array
                (
                    [pid] => 30
                    [anz_tn] => 5
                )
        )

    [2~Course2 08:30] => Array
        (
            [0] => Array
                (
                    [pid] => 30
                    [anz_tn] => 5
                )

            [1] => Array
                (
                    [pid] => 11
                )

            [2] => Array
                (
                    [anz_tn] => 4
                )
)

....

如何获取每个子数组的所有 anz_tn之和？ （所有[0] ['anz_tn']，[1] ['anz_tn']的总和，等等。）

How can I get the sum of all the "anz_tn" for each subarray? (sum of all [0]['anz_tn'],[1]['anz_tn'], etc..)

我尝试使用$ all [ ] [$ i] ['anz_tn']，但这失败。 （$ all是主数组，$ i是子数组的计数）。有办法使用array_sum吗？

I've tried to use $all[][$i]['anz_tn'] but this fails. ($all is the main array, $i is the count of subarrays). Is there a way using array_sum?

谢谢！

推荐答案

请尝试这样，

$sumArray = array();

foreach ($myArray as $k=>$subArray) {
  foreach ($subArray as $id=>$value) {
    if ($id == 'anz_tn')
      $sumArray[$id]+=$value;
  }
}

print_r($sumArray);

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