数组基于相同键的值总和

Question

我有我的数组数据,如下所示:

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 )
)

如何根据相同的"银行名称"对"金额"进行汇总.

我的数据应该如下所示:

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

所以,首先你需要$amountsArray以某种方式分配你列出的值.然后:

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

在此之后,$bankTotals是一个以银行名称索引的数组,其中包含银行总金额的值.你可以从这里使用这个数组.

可能有用的一件事是另一个foreach循环打印出来:

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;
}