I am creating a calculator to determine a persons heating and cooling bill. Instead of having 1 really big script to calculate their bill based on which zone they are in, I want to create 5 separate scripts to do them.

Example:

PHP Code:

if(zone == 'Zone 1') {
use script for zone 1
}
if(zone == 'Zone 2') {
use script for zone 2
}
if(zone == 'Zone 3') {
use script for zone 3
}
if(zone == 'Zone 4') {
use script for zone 4
}
if(zone == 'Zone 5') {
use script for zone 5
} 


Would I need to put this in the form action or would I have to redirect it? The problem I see with redirecting it is that the variables would lose their value as they were passed on to another page.

I dont know how your calculations would go about, but you could probably have just one script, and adjust a few values depending on the zone? Then you wouln't have to duplicate lots of code in each seperate script.

As a simplified example to show what I mean, lets say I want to calculate the cost of only electricity for different zones, and I know that if you live in zone1 each kWh costs 1 (dollar or something), in zone2 they cost 2 and in zone3 they cost 3.

I'll just put this value in my formula, as in

PHP Code:

switch($zone) {
   case 'zone1':
      $m = 1;
      break;
   case 'zone2':
      $m = 2;
      break;
   case 'zone3':
      $m = 3;
      break;
   default:
      $m = 1;
      break;
}

$cost = some_advanced_calculations() * $m; 


For your script maybe you'll need more than one variable $m. As I said, I dont know how your calculations would be like. But you could probably still set up some variables for each zone, so that they all could use the same calculation script.

Thanks I did this and it worked like a charm.