Redirecting to an event in PHP

I have a drop-down, and am trying to set up a function to redirect to an event based on the input from the drop-down using a simple PHP switch in Custom Code. However, shortcode like
​

{redirect:event_name} 

​
is not working. I feel like this should be a trivial thing but have not found any solution in my search. Example code below;
​

<?php

$foo= $this->data['data1'];
switch ($foo) {
          case 1: {redirect:event1};
          break;
          case 2: {redirect:event2};
          break;
          case 3: {redirect:event3};
          break;
          default: {redirect:index};
          break;
     }
?>

Made it work using the Switch function.

Shortcodes don't work in PHP, just for future reference.