合并，总结在PHP 2多维数组 [英] Merge and sum two multidimensional arrays in PHP

问题描述

我需要一种方法来合并多个阵列（大概在8）和总结的重复键或子键。

例如：

  $ ARR1 =阵列（
    星期五=＆GT;阵列（
        早餐=＆GT; 32，
        午餐=＆GT; 45
    ）
    星期日=＆GT;阵列（
        午餐=＆GT; 12
    ）
）;$ ARR2 =阵列（
    星期日=＆GT;阵列（
        早餐=＆GT; 7，
        午餐=＆GT; 3
    ）
    星期一=＆GT;阵列（
        早餐=＆GT; 12
    ）
）;$ ARR3 =阵列（
    星期一=＆GT;阵列（
        早餐=＆GT; 31
    ）
）;
 

和输出应该是这样的：

  $ =总阵列（
    星期五=＆GT;阵列（
        早餐=＆GT; 32，
        午餐=＆GT; 45
    ）
    星期日=＆GT;阵列（
        早餐=＆GT; 19，
        午餐=＆GT; 15
    ）
    星期一=＆GT;阵列（
        早餐=＆GT; 43
    ）
）;
 

我怎么能结合吗？我试过用

  array_map（）
 

但是，这似乎失败，多维数组这样。使用也试过

  forEach（）这样
 

但得到了pretty费解。

下面是我的尝试：

  $ =总array_map（函数（$ ARR1，$ ARR2，$ ARR3）{
    回报（$ ARR1 + $ ARR2 + $ ARR3）;
} $ ARR1，$ ARR2，$ ARR3）;
 

解决方案

尝试这种解决方案。您可以添加阵列中的任何计数。但请名称作为$ arr1- $ maxArraysCount

  $ ARR1 =阵列（
    星期五=＆GT;阵列（
        早餐=＆GT; 32，
        午餐=＆GT; 45
    ）
    星期日=＆GT;阵列（
        午餐=＆GT; 12
    ）
）;$ ARR2 =阵列（
    星期日=＆GT;阵列（
        早餐=＆GT; 7，
        午餐=＆GT; 3
    ）
    星期一=＆GT;阵列（
        早餐=＆GT; 12
    ）
）;$ ARR3 =阵列（
    星期一=＆GT;阵列（
        早餐=＆GT; 31
    ）
）;
$ maxArraysCount = 8;
$收益率=阵列（）;
为（$ i = 1; $ I＆LT; $ maxArraysCount; $ I ++）{
    $常用3 ='改编'。 $ I;
    如果（使用isset（ARR $$）及和放大器; is_array（$$ ARR））{
        的foreach（ARR $$作为$天=＆GT; $值）{
            的foreach（$值$吃=＆GT; $计数）{
                如果（使用isset（$返回[$日] [$吃]）！）$返回[$日] [$吃] = 0;
                $返回[$日] [$吃] = $计数+ $返回[$日] [$吃];
            }
        }
    }
}回声＆LT; pre＆gt;中;的print_r（$返程）;
 

下面是输出：

 阵列
（
    [周五] =＆GT;排列
        （
            [早餐] =＆GT; 32
            [午餐] =＆GT; 45
        ）    [日] =＆GT;排列
        （
            [午餐] =＆GT; 15
            [早餐] =＆GT; 7
        ）    [周一] =＆GT;排列
        （
            [早餐] =＆GT; 43
        ））
 

I'm needing a way to merge several arrays ( probably around 8 ) and sum any duplicate keys or sub-keys.

For example:

$arr1 = array(
    "Friday" => array(
        "Breakfast" => 32,
        "Lunch" => 45
    ),
    "Sunday" => array(
        "Lunch" => 12
    )
);

$arr2 = array(
    "Sunday" => array(
        "Breakfast" => 7,
        "Lunch" => 3
    ),
    "Monday" => array(
        "Breakfast" => 12
    )
);

$arr3 = array(
    "Monday" => array(
        "Breakfast" => 31
    )
);

And the output should be something like this:

$total = array(
    "Friday" => array(
        "Breakfast" => 32,
        "Lunch" => 45
    ),
    "Sunday" => array(
        "Breakfast" => 19,
        "Lunch" => 15
    ),
    "Monday" => array(
        "Breakfast" => 43
    )
);

How could I combine this? I've tried using

array_map()

But that seemed to fail with multidimensional arrays like this. Also tried using

Foreach()

but that got pretty convoluted.

Here's my attempt:

$total = array_map( function( $arr1, $arr2, $arr3 ){
    return( $arr1 + $arr2 + $arr3 );
}, $arr1, $arr2, $arr3 );

解决方案

Try this solution. You can add any count of arrays. But keep names as $arr1-$maxArraysCount

$arr1 = array(
    "Friday" => array(
        "Breakfast" => 32,
        "Lunch" => 45
    ),
    "Sunday" => array(
        "Lunch" => 12
    )
);

$arr2 = array(
    "Sunday" => array(
        "Breakfast" => 7,
        "Lunch" => 3
    ),
    "Monday" => array(
        "Breakfast" => 12
    )
);

$arr3 = array(
    "Monday" => array(
        "Breakfast" => 31
    )
);


$maxArraysCount = 8;
$return = array();
for($i = 1; $i < $maxArraysCount; $i++){
    $arr = 'arr' . $i;
    if(isset($$arr) && is_array($$arr)){
        foreach ($$arr as $day => $value) {
            foreach ($value as $eat => $count) {
                if(!isset($return[$day][$eat])) $return[$day][$eat] = 0;
                $return[$day][$eat] = $count + $return[$day][$eat];
            }
        }
    }
}

echo "<pre>";print_r($return);

Here is output:

Array
(
    [Friday] => Array
        (
            [Breakfast] => 32
            [Lunch] => 45
        )

    [Sunday] => Array
        (
            [Lunch] => 15
            [Breakfast] => 7
        )

    [Monday] => Array
        (
            [Breakfast] => 43
        )

)

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