switch question

[foamy]

Is there a way test multiple cases in a switch statement?

For example cases 1 and 2 have the same result as do cases 3 and 4. This code works fine, just a bit tedious as the cases grow.

switch ($_GET['id']) {

case '1':
	header("Location: /a.html");		
break;

case '2':
	header("Location: /a.html");			
break;

case '3':
	header("Location: /b.html");		
break;

case '4':
	header("Location: /b.html");			
break;

default:
header("index.html");
break;

I would like to do something like the following, but I've had no luck. No matter what I pass as the id, I always get location a.

switch ($_GET['id']) {

case '1' OR '2':
	header("Location: /a.html");		
break;

case '3' OR '4':
	header("Location: /a.html");			
break;

default:
header("index.html");
break;

[NogDog]

switch ($_GET['id'])
{
   case '1':
   case '2':
      header("Location: /a.html");        

      break;
   case '3':
   case '4':
      header("Location: /a.html");            

      break;
   default:
      header("index.html");
}

[laserlight]

Remember to use absolute URLs for the locations and have an exit after the header call.