thank you for your answer @modemlooper,
you know just after any page has been loaded, by clicking ‘view source’ anybody can see the source. In between tags source there things like:
So anybody can easily know what plugins are you using in your site. I’d like to know if there is anyway to prevent visitors to know that the site is developed with such plugins?. I mean, I want those source code were hidden or encrypted and they only to recognize the site as just a PHP site. It’s obvious anybody can view the source of a site using their browser. But some sites I have seen, even by viewing the source code, it’s not possible to find out whether it’s a wordpress site or not.