PHP で配列データをグループ化および合計してフラット連想配列を作成する方法

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

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

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

Bank BRI.....34534534
Bank BCA.....1435773657
Bank CIMB Niaga.....1338303418
Bank BNI.....124124
Bank Mandiri.....0
Bank Permata.....352352353