public static function execute($id)
{
echo 'RuleExtra $id: ' . $id . '<br/>' . PHP_EOL;
$model = RuleExtra::one($id);
echo '<pre>';
print_r($model);
echo '</pre>';
//exit();
return call_user_func('app\\models\\RuleExtra::' . $model->function);
// use app\models\ or else it cannot find class
}
