Undefined variable error when doing calculations - php

Question

I have a web application that I'm rebuilding in Laravel for a cleaning company.
1) I pass in the paramaters to the URL route
http://127.0.0.1:8000/book?bed_range=1&bath_range=1&percentage_range=0&duration_range=
2) It does calculations:
$bedroomCostFactor = [0, 30, 60, 90, 120, 150];
$bathroomCostFactor = [0, 20, 40, 60, 80, 100];
$percentageFactor = [0, 5, 15, 10, 20];
if (isset($bed_range) && !empty($bed_range)) {
if ($bed_range == 1) {
$bed_cost = $bedroomCostFactor[0];
} else if ($bed_range == 2){
$bed_cost = $bedroomCostFactor[1];
} else if ($bed_range == 3){
$bed_cost = $bedroomCostFactor[2];
} else if ($bed_range == 4){
$bed_cost = $bedroomCostFactor[3];
} else if ($bed_range == 5){
$bed_cost = $bedroomCostFactor[4];
} else if ($bed_range == 6){
$bed_cost = $bedroomCostFactor[5];
}
}
if(isset($bath_range) && !empty($bath_range)) {
if ($bath_range == 1) {
$bath_cost = $bathroomCostFactor[0];
} else if ($bath_range == 2){
$bath_cost = $bathroomCostFactor[1];
} else if ($bath_range == 3){
$bath_cost = $bathroomCostFactor[2];
} else if ($bath_range == 4){
$bath_cost = $bathroomCostFactor[3];
} else if ($bath_range == 5){
$bath_cost = $bathroomCostFactor[4];
} else if ($bath_range == 6){
$bath_cost = $bathroomCostFactor[5];
}
}
if(isset($percentage_range) && !empty($percentage_range)) {
if ($percentage_range == 0) {
$percentage_cost = $percentageFactor[0];
} else if ($percentage_range == 5){
$percentage_cost = $percentageFactor[1];
} else if ($percentage_range == 15){
$percentage_cost = $percentageFactor[2];
} else if ($percentage_range == 10){
$percentage_cost = $percentageFactor[3];
} else if ($percentage_range == 20){
$percentage_cost = $percentageFactor[4];
}
}
$subtotal = "100.00";
$tax = number_format($subtotal * .0725, 2);
$total = $subtotal + $tax;
$discount = number_format(($subtotal * $percentage_cost) / 100, 2);
For some reason, when I migrate the code to Laravel, it no longer works and it starts saying variables like $discount and $percentage_cost are undefined.
In my previous application the calculations run just fine like you'd expect. Why isn't it working in Laravel?

Answer 1

I had to remove the if condition
if(isset($percentage_range) && !empty($percentage_range)) {