<?php
 
error_reporting(-1);
 
function paymentSum($sum, $payout, $percent, $commission) {
	$paymentTotal=0;
	for ($i=1; $i>0; $i++) {
		$sum = $sum + $sum * $percent/100 + $commission - $payout;
		$paymentTotal = $paymentTotal + $payout;
		if ($sum == 0) {
			break;
		} elseif ($sum + $sum * $percent/100 + $commission < $payout) {
			$payout = $sum + $sum * $percent/100 + $commission;
		}
	}
	return $paymentTotal;
}
 
$homoCreditTotal = paymentSum(39999, 5000, 4, 500);
$softBankTotal = paymentSum(39999, 5000, 3,1000);
$strawberryBankTotal = paymentSum(39999, 5000, 2, 0) + 7777;
 
echo"1 - $homoCreditTotal рублей\n";
echo"2 - $softBankTotal рублей\n";
echo"3 - $strawberryBankTotal рублей\n";
 
?>

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