<?php if ( ! defined( 'ABSPATH' ) ) {
	return;
}

/**
 * Add specific css class to active item
 */
add_filter( 'nav_menu_css_class', 'zn_active_item_classes', 10, 2 );
if ( ! function_exists( 'zn_active_item_classes' ) ) {
	/**
	 * Add specific css class to active item
	 * @param array $classes
	 * @param bool  $menu_item
	 * @hooked to nav_menu_css_class
	 * @see functions.php
	 * @return array
	 */
	function zn_active_item_classes( $classes = array(), $menu_item = false ) {

		// Check for single page item
		if ( ! empty( $menu_item->url ) && strpos( $menu_item->url, '#' ) ) {
			return $classes;
		}

		if ( in_array( 'current-menu-item', $menu_item->classes, true ) || in_array( 'current-menu-ancestor', $menu_item->classes, true ) ) {
			$classes[] = 'active';
		}
		return $classes;
	}
}