<?php

error_reporting(-1);

function getBalance($deposit,$percent,$comission,$paidAmount){

	for ($i=0;$i<100;$i++){
		if ($credit>0){
			$credit = ($deposit*$percent)+$comission-$paidAmount;
			$overallPaid=$paidAmount+ $overallPaid;
		} else {
			$overallPaid= $overallPaid+ ($paidAmount+$credit);
			return $overallPaid;
			break;
		}
	}
}

$abc = function getBalance (39999,1.1,1000,5000);