switch ( $time ) {
   case "30days" {
      $caption .= "Past 30 Days";
   }
   case "3mons" {
      $caption .= "Past 3 Months";
   }
   case "1yr" {
      $caption .= "Past 1 Year";
   }
   case "all" {
      $caption .= "All Data";
   }
}