How to disable single post view in wp

Question

I want know, How to disable single post view in wp. any plugin or setting???

Is there a way to disable single post page, for example when some tries to go to single post page to show not found or 404 page.

Answer 1

You can add to the end of theme's header.php file this:

if( is_single() ) {
  global $wp_query;
  $wp_query->set_404();
  status_header( 404 );
  get_template_part( '404' );
  exit();
}

Note that the get_template_part( '404' ) function needs 404.php file in your theme directory.