function link_to($controller, $action, $params=array()) {
if(is_object($controller)){
$controller = get_class($controller);
$controller_file = Toolbox::from_camel_case($controller);
$controller_parts = explode('_',$controller_file);
$controller = $controller_parts[0];
}
$url = "";
if (Config::instance('framework')->get_value('clean_urls')) {
$url = Kernel::$request->root_url . "/$controller/$action";
} else {
$url = Kernel::$request->root_url . "/index.php?url=$controller/$action";
}
if (!empty($params)) {
$url .= '?';
$url_params = array();
foreach ($params as $key => $val) {
$url_params[] = urlencode($key) . '=' . urlencode($val);
}
$url .= join('&', $url_params);
}
return $url;
}
