合并和求和多维多维关联数组 [英] Merge and sum multiple multidimensional associative arrays
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问题描述
我需要一种方法来合并几个数组(大概8个左右),并对所有重复的键或子键求和.
I'm needing a way to merge several arrays ( probably around 8 ) and sum any duplicate keys or sub-keys.
例如:
$arr1 = [
"Friday" => ["Breakfast" => 32, "Lunch" => 45],
"Sunday" => ["Lunch" => 12]
];
$arr2 = [
"Sunday" => ["Breakfast" => 7, "Lunch" => 3],
"Monday" => ["Breakfast" => 12]
];
$arr3 = [
"Monday" => ["Breakfast" => 31]
];
输出应该是这样的:
array (
'Friday' =>
array (
'Breakfast' => 32,
'Lunch' => 45,
),
'Sunday' =>
array (
'Lunch' => 15,
'Breakfast' => 7,
),
'Monday' =>
array (
'Breakfast' => 43,
),
);
我该如何结合呢?我尝试使用 array_map()
.
How could I combine this? I've tried using array_map()
.
但是对于像这样的多维数组,这似乎失败了.还尝试过使用 foreach()
,但结果令人费解.
But that seemed to fail with multidimensional arrays like this. Also tried using foreach()
, but that got pretty convoluted.
这是我的尝试:
$total = array_map( function( $arr1, $arr2, $arr3 ){
return( $arr1 + $arr2 + $arr3 );
}, $arr1, $arr2, $arr3 );
推荐答案
尝试此解决方案.您可以添加任意数量的数组.但是将名称保留为$ arr1- $ maxArraysCount
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);
此处输出:
Array
(
[Friday] => Array
(
[Breakfast] => 32
[Lunch] => 45
)
[Sunday] => Array
(
[Lunch] => 15
[Breakfast] => 7
)
[Monday] => Array
(
[Breakfast] => 43
)
)
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