<?php
error_reporting(-1);

function bankDifference($creditSum, $monthPay) {
	for ($i = 0; $creditSum = 0; $i++){
		$totalSum = $creditSum
	}
	return $totalSum;
}

$creditSum = 39999;
$monthPay = 5000;
$homoBank = ($creditSum * 1.04) + 500;
$strawberryBank = ($creditSum * 1.02) + 7777;
$softBank = ($creditSum * 1.03) + 1000;

echo "{$homoBank}\n";
echo "{$strawberryBank}\n";
echo "{$softBank}\n";