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<?php $vouchers = array( 1 => 100, 3 => 150, 5 => 100 ); $discounts = array(); $orders = array(50, 100, 200, 300, 500, 1000); foreach ($orders as $order) { $vouchers2 = $vouchers; foreach ($vouchers2 as $id => $voucher) { $discounts[$order][$id] = 0; } $remainingValue = $order; $voucher = array_pop($vouchers2); if ($voucher === null) { echo 'exiting for order '. $order . PHP_EOL; continue; } while($remainingValue > 0 && $voucher !== null) { $value = min ($remainingValue, $voucher); $discounts[$order][$id] = $value; $voucher = array_pop($vouchers2); $remainingValue -= $value; } } var_dump($discounts);

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