多维数组上每个键的和值

时间:2015-07-31 18:07:34

标签: php arrays multidimensional-array foreach sum

我有一个大海捞针,我想分别对每个数组的值求和。这就是我所拥有的:

Array //ALL THE HAYSTACK
(
    [0] => Array //REPRESENTS MONTH 1
        (
            [0] => Array  //REPRESENTS WEEK 1
                (
                    [week] => 1
                    [user1] => Array
                        (
                            [0] => Array
                                (
                                    [sell] => value
                                    [cost] => value
                                    [gain] => value
                                )
                        )

                    [user2] => Array
                        (
                            [0] => Array
                                (
                                    [sell] => value
                                    [cost] => value
                                    [gain] => value
                                )
                        )

                    [user3] => Array
                        (
                            [0] => Array
                                (
                                    [sell] => value
                                    [cost] => value
                                    [gain] => value
                                )
                        )
                )
            //... MORE WEEKS

        [1] => Array //REPRESENTS MONTH 2
        ( //... ALL THE PROCCES ABOVE
) 

我正在尝试每个月和每周使用foreach(),如下所示:

$result = $array('sell' => 0, 'cost' => 0, 'gain' => 0);
foreach ($monthArray as $theMonth => $week){
    foreach ($week as $user){
        $result['sell'] +=  $user['user1'][0]['sell'];
        $result['sell'] +=  $user['user2'][0]['sell'];
        $result['sell'] +=  $user['user3'][0]['sell'];

        //...

但是,当我每个月打印$result时,不是我想要的特定月份......

我想每周和每个月都要求和。怎么解决这个问题?

2 个答案:

答案 0 :(得分:0)

这个怎么样?:结果($sales)是一个数组。这个数组的键是月份,数组的值是总数。通过迭代本月的几周,然后每周迭代用户来获得总数。我自己介绍的后一次迭代,因为您使用的是user1,user2,user3 ....这个硬编码列表....

不是将它存储在另一个数组中,您也可以立即回声或使用它,但我认为在数组中使用它更方便进一步处理。它稍微解开了你的代码。

$result = $array('sell' => 0, 'cost' => 0, 'gain' => 0);
foreach ($monthArray as $theMonth => $week){
    $sales[$theMonth] = 0;
    foreach ($week as $users){
        foreach ($users as $user) {
            $sales[$theMonth] +=  $user[0]['sell'];
        }
    }
}

result['sell'] = $sales;
print_r(result['sell']);

如果您希望每个月也有成本和收益,那么创建一个格式为$result[month]['sell']而不是$result['sell'][month]更有意义。

答案 1 :(得分:0)

您可以尝试使用array_reduce()array_column()。一个例子:这里:

//$array = your array
$sum_arr = array_reduce($array, function($old, $new){
    $arr = array_filter(array_map(function($v){ return is_array($v) ? $v : '';}, array_shift($new)));
    return [
        'sell' => array_sum(array_column($arr, 'sell')) + $old['sell'],
        'cost' => array_sum(array_column($arr, 'cost')) + $old['cost'],
        'gain' => array_sum(array_column($arr, 'gain')) + $old['gain'],
    ];
}, ['sell'=>0, 'cost'=>0, 'gain'=>0]);

<强>更新

array_column()的替代方案:

$sum_arr = array_reduce($array, function($old, $new){
    $arr = array_filter(array_map(function($v){ return is_array($v) ? $v : '';}, array_shift($new)));
    return [
        'sell' => array_sum(array_map(function($v){return $v['sell'];}, $arr)) + $old['sell'],
        'cost' => array_sum(array_map(function($v){return $v['cost'];}, $arr)) + $old['cost'],
        'gain' => array_sum(array_map(function($v){return $v['gain'];}, $arr)) + $old['gain'],
    ];
}, ['sell'=>0, 'cost'=>0, 'gain'=>0]);