Сумма значений массива на основе того же ключа

Question

У меня есть данные массива, как показано ниже:

Array ( 
  [0] => Array ( [name] => Bank BRI [amount] => 0 ) 
  [1] => Array ( [name] => Bank BRI [amount] => 0 ) 
  [2] => Array ( [name] => Bank BCA [amount] => 1412341234 )
  [3] => Array ( [name] => Bank CIMB Niaga [amount] => 532532552 ) 
  [4] => Array ( [name] => Bank BRI [amount] => 34534534 ) 
  [5] => Array ( [name] => Bank CIMB Niaga [amount] => 453425243 ) 
  [6] => Array ( [name] => Bank BRI [amount] => 0 ) 
  [7] => Array ( [name] => Bank BNI [amount] => 124124 ) 
  [8] => Array ( [name] => Bank CIMB Niaga [amount] => 352345623 ) 
  [9] => Array ( [name] => Bank BCA [amount] => 23432423 ) 
  [10] => Array ( [name] => Bank Mandiri [amount] => 0 ) 
  [11] => Array ( [name] => Bank BCA [amount] => 0 ) 
  [12] => Array ( [name] => Bank BCA [amount] => 0 ) 
  [13] => Array ( [name] => Bank Permata [amount] => 352352353 )
)

Как суммировать «сумму» на основании того же «названия банка».

Мои данные должны отображаться так:

Bank BRI........... with '*total amount*'
Bank BCA........... with '*total amount*'
Bank CIMB NIAGA.... with '*total amount*'
Bank BNI........... with '*total amount*'
Bank Mandiri....... with '*total amount*'
Bank Permata....... with '*total amount*'

Answer 1

Итак, сначала вам нужно $amountsArray, чтобы каким-то образом получить присвоенные вами значения.Затем:

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

После этого $bankTotals - это индексированный по имени банка массив со значением общей суммы для банка.Вы можете использовать этот массив так, как считаете нужным.

Одна вещь, которая может быть полезна, - это еще один цикл foreach, чтобы распечатать все это:

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

Answer 2

<?php

// array of bank structure
$banks = array();
$banks[] = array('name'=>'Bank BRI','amount'=>rand());
$banks[] = array('name'=>'Bank BRI','amount'=>rand());
$banks[] = array('name'=>'Bank BCA','amount'=>rand());
$banks[] = array('name'=>'Bank CIMB','amount'=>rand());
$banks[] = array('name'=>'Bank BRI','amount'=>rand());
$banks[] = array('name'=>'Bank CIMB','amount'=>rand());
$banks[] = array('name'=>'Bank BRI','amount'=>rand());
$banks[] = array('name'=>'Bank BNI','amount'=>rand());
$banks[] = array('name'=>'Bank CIMB','amount'=>rand());
$banks[] = array('name'=>'Bank BCA','amount'=>rand());
$banks[] = array('name'=>'Bank Mandiri','amount'=>rand());
$banks[] = array('name'=>'Bank BCA','amount'=>rand());
$banks[] = array('name'=>'Bank BCA','amount'=>rand());
$banks[] = array('name'=>'Bank Permata','amount'=>rand());

// begin the iteration for grouping bank name and calculate the amount
$amount = array();
foreach($banks as $bank) {
    $index = bank_exists($bank['name'], $amount);
    if ($index < 0) {
        $amount[] = $bank;
    }
    else {
        $amount[$index]['amount'] +=  $bank['amount'];
    }
}
print_r($amount); //display 

// for search if a bank has been added into $amount, returns the key (index)
function bank_exists($bankname, $array) {
    $result = -1;
    for($i=0; $i<sizeof($array); $i++) {
        if ($array[$i]['name'] == $bankname) {
            $result = $i;
            break;
        }
    }
    return $result;
}

Answer 3

Я бы лучше добавил

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

Answer 4

Пример на C #:

Dictionary<string,object>[] items = {
  new Dictionary<string, object> {{ "name", "Bank BRI"}, {"amount", 0 }},
  new Dictionary<string, object> {{ "name", "Bank BRI"}, {"amount", 0 }},
  new Dictionary<string, object> {{ "name", "Bank BCA"}, {"amount", 1412341234 }},
  new Dictionary<string, object> {{ "name", "Bank CIMB Niaga"}, {"amount", 532532552 }} 
};

var amounts = new Dictionary<string, int>();

foreach (var item in items) {
  string bank = (string)item["name"];
  int amount = (int)item["amount"];
  if (amounts.ContainsKey(bank)) {
    amounts[bank] += amount;
  } else {
    amounts.Add(bank, amount);
  }
}

foreach (var amount in amounts) {
  Console.WriteLine("{0}: {1}", amount.Key, amount.Value);
}

Answer 5

$a = arrayofindonesianbanks;

foreach ($a as $anarrays) {
        echo "$anarrays[name]."  ".$anarrays[amount]";
    }
}

см. Foreach в php.