cvm/frontend/modules/shared/logout.php

<?php
/*
 * CVM is more free software. It is licensed under the WTFPL, which
 * allows you to do pretty much anything with it, without having to
 * ask permission. Commercial use is allowed, and no attribution is
 * required. We do politely request that you share your modifications
 * to benefit other developers, but you are under no enforced
 * obligation to do so :)
 * 
 * Please read the accompanying LICENSE document for the full WTFPL
 * licensing text.
 */

if(!isset($_CVM)) { die("Unauthorized."); }

if($sLoggedIn === true)
{
	unset($_SESSION['userid']);
	$sUser = new User(0);
	$sLoggedIn = false;
	
	$sError .= NewTemplater::Render("{$sTheme}/shared/error/success", $locale->strings, array(
		'title'		=> $locale->strings['error-logout-success-title'],
		'message'	=> $locale->strings['error-logout-success-text']
	));
}
else
{
	$sError .= NewTemplater::Render("{$sTheme}/shared/error/error", $locale->strings, array(
		'title'		=> $locale->strings['error-logout-notloggedin-title'],
		'message'	=> $locale->strings['error-logout-notloggedin-text']
	));
}