Righlight Current parent and child menu

functions.php

<?php
//Righlight Current parent and child menu 
	 add_filter('nav_menu_css_class', 'add_active_class', 10, 2 );

function add_active_class($classes, $item) {

  if( in_array( 'current-menu-item', $classes ) ||
    in_array( 'current-menu-ancestor', $classes ) ||
    in_array( 'current-menu-parent', $classes ) ||
    in_array( 'current_page_parent', $classes ) ||
    in_array( 'current_page_ancestor', $classes )
    ) {

    $classes[] = "current-menu-item";
  }

  return $classes;
}
//END Righlight Current parent and child menu