Add version control to css for caching using time stamping

version-enqueue.php

function jm_enqueue_scripts() {

	// Gets the last time the style sheet was updated
	$version = filemtime( get_stylesheet_directory() . '/style.css' );

	// Enqueues style.css and assigns version to ensure browser cache is dropped
	wp_enqueue_style( 'arbaros-styles', get_stylesheet_directory_uri() . '/style.css', array(), $version, 'all' );

}
add_action( 'wp_enqueue_scripts', 'jm_enqueue_scripts' );