php 二维数组计算求和

Question

 [34] => Array
        (
            [sum] => 13
            [name] => 油区开发部
            [id] => 27
            [parentid] => 1
            [children] => Array
                (
                )

        )

    [35] => Array
        (
            [sum] => 2
            [name] => 三分公司
            [id] => 31
            [parentid] => 1
            [children] => Array
                (
                    [0] => Array
                        (
                            [sum] => 156
                            [name] => 项目管理分中心
                            [id] => 52
                            [parentid] => 31
                            [children] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [sum] => 12
                            [name] => 弯管机组
                            [id] => 54
                            [parentid] => 31
                            [children] => Array
                                (
                                )

                        )

                    [2] => Array
                        (
                            [sum] => 20
                            [name] => 车队
                            [id] => 53
                            [parentid] => 31
                            [children] => Array
                                (
                                )

                        )

                    [3] => Array
                        (
                            [sum] => 10
                            [name] => 维修机组
                            [id] => 55
                            [parentid] => 31
                            [children] => Array
                                (
                                )

                        )

                    [4] => Array
                        (
                            [sum] => 55
                            [name] => 机关
                            [id] => 51
                            [parentid] => 31
                            [children] => Array
                                (
                                )

                        )

                )

        )

    [36] => Array
        (
            [sum] => 56
            [name] => 五分公司
            [id] => 32
            [parentid] => 1
            [children] => Array
                (
                )

        )

如何计算三分公司的sum值，是三分公司 children下的 所有 sum的和

Answer 1

$data = Array ( 34 => Array ( 'sum' => 13, 'name' => '油区开发部', 'id' => 27, 'parentid'=> 1, 'children' => Array ( ), ), 35 => Array( 'sum' => 2, 'name' => '三分公司', 'id' => 31, 'parentid'=> 1, 'children' => Array ( 0 => Array ( 'sum' => 156, 'name' => '项目管理分中心', 'id' => 52, 'parentid'=> 31, 'children'=> [], ), 1 => Array ( 'sum' => 12, 'name' => '弯管机组', 'id' => 54, 'parentid'=> 31, 'children'=> [], ), ), ), 36 => Array ( 'sum' => 56, 'name' => '五分公司', 'id' => 32, 'parentid'=> 1, 'children' => Array ( ), ) ); foreach($data as $key => $value) { $data[$key]['sum'] = array_sum(array_column($value['children'],'sum')); } print_r($data);

Answer 2

$arr = [[ 'name' => '三分公司', 'children' => [ ['sum' => 156], ['sum' => 12] ] ]]; function getChildrenSum($children) { $sum = 0; if (is_array($children)) { foreach ($children as $item) { $sum += $item['sum']; if(isset($item['children'])){ $sum += getChildrenSum($item['children']); } } } return $sum; } $sum = array_reduce( array_filter($arr, function ($item) { return $item['name'] === '三分公司'; }), function ($sum, $item) { return $sum + getChildrenSum($item['children']); }, 0 ); echo $sum;

Answer 3

foreach计算就可以了。又不是无限极

Answer 4

使用foreach循环。

Answer 5

定义一个变量：$sums = 0;假设你外面的大数组是 $data, foreach($data as $key => $value){ if($value['name'] == '三分公司'){ foreach($value['children'] as $k => $v) { $sums += $v['sum'] } } } print_r($sums); 或者是：foreach($data as $key => $value){ $sums = array_sum(array_column($value['children'],'sum')); }print_r($sums);