FD RD Computation for LIC t.no.75 policy

<?php

$premium = 1000;

$rate = 0.05;

$years = 20;

echo "RD = ".rd($premium,$rate,$years)."\n";

$fd1 = fd(3000,0.05,15);

$fd2 = fd(3000,0.05,10);

$fd3 = fd(3000,0.05,5);

$fd4 = 22000;

echo "FD = ".($fd1+$fd2+$fd3+$fd4)."\n";

function fd($amt,$rate,$years) {

        for($i=0; $i<$years;++$i) {

                $amt = $amt*(1+$rate);

        }

        return $amt;

}

function rd($amt,$rate,$years) {

        $final = 0;

        for($i=0; $i<$years;++$i) {

                $final = ($final + $amt)*(1+$rate);

        }

        return $final;

}

?>