Why do my routes only work on localhost and not on a Web server?

I'm a .NET developer (desktop apps & mobiles) trying to get on the web that I found the best PHP because it's a free Lang and its IDE's are light. I created my MVC pattern (for being a beginner I prefer not to use frameworks) and the local machine is ball show. But why when I migrate it to a server gives a problem on the routes? Stop changing page, just keep DEFAULT (Home). What's wrong with my code?

    public static function route($url) {

        // my default controller
        define('DEFAULT_CONTROLLER', 'Home');

        // controller
        $controller = (isset($url[0]) && $url[0] != '') ? ucwords($url[0]) : DEFAULT_CONTROLLER;
        $controller_name = $controller;
        array_shift($url);

        // action
        $action = (isset($url[0]) && $url[0] != '') ? $url[0] . 'Action': 'indexAction';
        $action_name = $controller;
        array_shift($url);

        $queryParams = $url;

        $dispatch = new $controller($controller_name, $action);

        if (method_exists($controller, $action)) {
            call_user_func_array([$dispatch, $action], $queryParams);
        } else {
            header("Location: ../_404");
        }
    }

}

.htaccess file

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond $1 !^(config|core|css|js|fonts|robots\.txt) 
RewriteRule ^(.+)$ index.php/$1 [L]