php - 对一列的数组数据进行分组并对另一列的数据求和

Question

我的数组数据如下所示:

$array = [
    ['name' => 'Bank BRI', 'amount' => 0], 
    ['name' => 'Bank BRI', 'amount' => 0], 
    ['name' => 'Bank BCA', 'amount' => 1412341234],
    ['name' => 'Bank CIMB Niaga', 'amount' => 532532552], 
    ['name' => 'Bank BRI', 'amount' => 34534534], 
    ['name' => 'Bank CIMB Niaga', 'amount' => 453425243], 
    ['name' => 'Bank BRI', 'amount' => 0], 
    ['name' => 'Bank BNI', 'amount' => 124124], 
    ['name' => 'Bank CIMB Niaga', 'amount' => 352345623], 
    ['name' => 'Bank BCA', 'amount' => 23432423], 
    ['name' => 'Bank Mandiri', 'amount' => 0], 
    ['name' => 'Bank BCA', 'amount' => 0], 
    ['name' => 'Bank BCA', 'amount' => 0], 
    ['name' => 'Bank Permata', 'amount' => 352352353],
];

如何根据相同的“银行名称”对“金额”求和。

我的结果应该显示分组名称及其总和:

array (
  'Bank BRI' => 34534534,
  'Bank BCA' => 1435773657,
  'Bank CIMB Niaga' => 1338303418,
  'Bank BNI' => 124124,
  'Bank Mandiri' => 0,
  'Bank Permata' => 352352353,
)

Answer 1

因此，首先您需要 $amountsArray 以某种方式分配您列出的值。然后:

$bankTotals = array();
foreach($amountsArray as $amount)
{
  $bankTotals[$amount['name']] += $amount['amount'];
}

输出:(Demo)

Warning: Undefined array key "Bank BRI"

Warning: Undefined array key "Bank BCA"

Warning: Undefined array key "Bank CIMB Niaga"

Warning: Undefined array key "Bank BNI"

Warning: Undefined array key "Bank Mandiri"

Warning: Undefined array key "Bank Permata"
array (
  'Bank BRI' => 34534534,
  'Bank BCA' => 1435773657,
  'Bank CIMB Niaga' => 1338303418,
  'Bank BNI' => 124124,
  'Bank Mandiri' => 0,
  'Bank Permata' => 352352353,
)

在此之后，$bankTotals 是一个以银行名称为索引的数组，其值为银行的总金额。您可以在此处根据需要使用此数组。

可能有用的一件事是另一个 foreach 循环将其全部打印出来:

foreach($bankTotals as $name => $amount)
{
  echo $name.".....".$amount."\n";
}