title: default as first option in switch statement?
body: <p>I've tested this and it works fine, but it looks... weird... to me. Should I be concerned that this is nonstandard form which will be dropped in a future version of PHP, or that it may stop working? I've always had a default case as the final case, never as the first case...</p>
  
  <pre><code>switch($kind)
  {
      default:
          // The kind wasn't valid, set it to the default
          $kind = 'kind1';
          // and fall through:
  
      case 'kind1':
          // Do some stuff for kind 1 here
          break;
  
      case 'kind2':
          // do some stuff for kind2 here
          break;
  
      // [...]
  
      case 'kindn':
          // do some stuff for kindn here
          break;
  
  }
  
  // some more stuff that uses $kind here...
  </code></pre>
  
  <p>(In case it's not obvious what I'm trying to do is ensure $kind is valid, hence the default: case. But the switch also performs some operations, and then $kind is used after the switch as well. That's why default: falls through to the first case, and also sets $kind)</p>
  
  <p>Suggestions? Is this normal/valid syntax?</p>