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// Remove version in querystring for static files url
function custom_remove_query_string($src){
$arr_params = array( 'ver', 'v', 'rev');
return remove_query_arg( $arr_params, $src);
}
add_filter('script_loader_src','custom_remove_query_string',20,1);
add_filter('style_loader_src','custom_remove_query_string',20,1);