style.css with version number

Hi,

The css and javascript files are always being cached by the browser even I disabled the cache from my browser in the debugger. And this always happening in my customer as well. Sometimes it is hard to ask them to clear the browser cache.

I tried to add a random number parameter to the style.css in header.php but I found the wp_head() function will load the theme style anyway. It makes the style.css loaded 2 times. One is the cached file and the other one in random number parameter which is the most updated. However, it makes conflict sometimes as the cached css can overwrite the most updated css. So, I tried to see if there is any hack to the wp_head function. I added the following code to the function.php. But I still see the same css file loaded 2 times with one in version number and the second one in filen time. How can I disable the default one to be loaded in wp_head?

function css_versioning() {
wp_enqueue_style( ‘style-css’, get_stylesheet_directory_uri() . ‘/style.css’ , false,filemtime( get_stylesheet_directory() . ‘/style.css’ ), ‘all’ );
}
add_action( ‘wp_enqueue_scripts’, ‘css_versioning’ );