Temporary Theme Switch

AS I test different themes, wanted a quick and dirty way to switch between themes. No plugins, just some code in the config.php file and added some links in the bottom zone of my templates.

Config.php

// Temporary theme switcher for testing
//session_start(); //need for theme switcher
 \Phile\Session::start();
if(isset($_GET['sitetheme']))
 {
    if ($_GET['sitetheme'] =='default') \Phile\Session::set('sitetheme', 'default' );
    if ($_GET['sitetheme'] =='tales') \Phile\Session::set('sitetheme', 'tales' ); 
    if ($_GET['sitetheme'] =='wikitten') $_SESSION['sitetheme'] = 'wikitten';
 }

if((\Phile\Session::get('sitetheme')))
{
    $config['theme'] = \Phile\Session::get('sitetheme');
}

bottom.md

I put a theme switcher links in the bottom of each template.

/*
Title: Bottom
Description: Text for the bottom Zone
*/
[Rss Feed](% base_url%/feed)  |  [Site Map](% base_url%/sitemap.xml) | Choose Theme: [Wikitten](?sitetheme=wikitten) : [Default](?sitetheme=default) : [Default](?sitetheme=tales)