I think you should break out your for loop outside of the switch. Now it is incorrect syntax. Try this:

foreach ($getcustpage as $k => $v) {
     switch ($k) {
   case $v:
    print 'Variable $v tripped switch: '.$k.'<br>'.$v;
   break;
   case "result":
    //result
   break;
   default:
    //default 
   break;
    }
}

I found the solution.

First i create normal switch like this

switch ($page) {
   case "result":
    //result
   break;
   default:
    //default 
   break;
}

Then i need to add a logic in default switch

if (in_array($page, $getcustpage)) {
  foreach ($getcustpage as $k => $v) {
    print 'Variable $v tripped switch: '.$k.'<br>'.$v;
  }
}else{
   print $page;
}

Thanks for help.