如何对多维关联数组的值求和？
我的数组如下：
$testarray=[];
$testarray[]=[
"2019-12-31" => [
"category1" => [
"total" => "10"
],
"category2" => [
"total" => "20"
],
],
"2020-01-31" => [
"category1" => [
"total" => "100"
],
"category2" => [
"total" => "200"
],
],
"2020-02-28" => [
"category1" => [
"total" => "1000"
],
"category2" => [
"total" => "2000"
]
],
];
我尝试了以下方法：
foreach($testarray[0] as $Offset=>$ArrayOfResults){
foreach($ArrayOfResults as $ResultOffset=>$Result){
$total+= $Result["total"];
}
$sums[$Offset]=$total;
}
结果是：
"2019-12-31" => 30
"2020-01-31" => 330
"2020-02-28" => 3330
我如何获得所需的结果，如下所示将category1和category2值相加：
"2019-12-31" => 30
"2020-01-31" => 300
"2020-02-28" => 3000
而不是嵌套循环，请使用array_sum()和array_column()。
foreach ($testarray[0] as $date => $results) {
$sums[$date] = array_sum(array_column($results, 'total'));
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