[Wordpress] Remove query strings from javascript and css files

functions.php

<?php

function remove_cssjs_querystring( $src ) {
  if( strpos( $src, '?rev=' ) ) // copy/paste this line and the next one to take away what you want from the end of your css/js
    $src = remove_query_arg( 'rev', $src );
  if( strpos( $src, '?ver=' ) )
    $src = remove_query_arg( 'ver', $src );
  return $src;
}
add_filter( 'style_loader_src', 'remove_cssjs_querystring', 10, 2 );
add_filter( 'script_loader_src', 'remove_cssjs_querystring', 10, 2 );

?>