If you use WordPress you know that WordPress adds a generator meta tag with the version number on the head section of the source code. Also some CSS and JS files also add a query string at the end of the file name, the query string can be the version number of the file. The problem with query strings added like this is some browsers and proxy servers like Varnish don’t cache them, some CDNs also don’t cache files with query string.
It is possible to remove this version numbers and query strings from outputting into the HTML. It also serves a purpose by adding basic protection from prying eyes.
To remove the WordPress generator tag with version number, place the below code in your theme functions.php. This will only remove the tag from html pages, if you want to remove it completely, for example from RSS feeds as well you need to adda filter to do that.
remove_action( 'wp_head', 'wp_generator' );
To remove version number from CSS and JS file paste the below code in your theme functions.php file.
// remove query strings from any enqueued scripts
function vc_remove_wp_ver_css_js( $src ) {
if ( strpos( $src, 'ver=' ) )
$src = remove_query_arg( 'ver', $src );
return $src;
}
add_filter( 'style_loader_src', 'vc_remove_wp_ver_css_js', 9999 );
add_filter( 'script_loader_src', 'vc_remove_wp_ver_css_js', 9999 );
