<?php

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/**

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* Nav Menu API: Template functions

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*

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* @package WordPress

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* @subpackage Nav_Menus

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* @since 3.0.0

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*/

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// Don't load directly.

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if ( ! defined( 'ABSPATH' ) ) {

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die( '-1' );

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}

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/** Walker_Nav_Menu class */

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require_once ABSPATH . WPINC . '/class-walker-nav-menu.php';

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/**

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* Displays a navigation menu.

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*

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* @since 3.0.0

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* @since 4.7.0 Added the `item_spacing` argument.

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* @since 5.5.0 Added the `container_aria_label` argument.

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*

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* @param array $args {

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* Optional. Array of nav menu arguments.

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*

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* @type int|string|WP_Term $menu Desired menu. Accepts a menu ID, slug, name, or object.

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* Default empty.

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* @type string $menu_class CSS class to use for the ul element which forms the menu.

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* Default 'menu'.

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* @type string $menu_id The ID that is applied to the ul element which forms the menu.

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* Default is the menu slug, incremented.

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* @type string $container Whether to wrap the ul, and what to wrap it with.

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* Default 'div'.

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* @type string $container_class Class that is applied to the container.

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* Default 'menu-{menu slug}-container'.

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* @type string $container_id The ID that is applied to the container. Default empty.

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* @type string $container_aria_label The aria-label attribute that is applied to the container

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* when it's a nav element. Default empty.

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* @type callable|false $fallback_cb If the menu doesn't exist, a callback function will fire.

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* Default is 'wp_page_menu'. Set to false for no fallback.

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* @type string $before Text before the link markup. Default empty.

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* @type string $after Text after the link markup. Default empty.

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* @type string $link_before Text before the link text. Default empty.

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* @type string $link_after Text after the link text. Default empty.

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* @type bool $echo Whether to echo the menu or return it. Default true.

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* @type int $depth How many levels of the hierarchy are to be included.

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* 0 means all. Default 0.

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* Default 0.

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* @type object $walker Instance of a custom walker class. Default empty.

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* @type string $theme_location Theme location to be used. Must be registered with

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* register_nav_menu() in order to be selectable by the user.

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* @type string $items_wrap How the list items should be wrapped. Uses printf() format with

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* numbered placeholders. Default is a ul with an id and class.

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* @type string $item_spacing Whether to preserve whitespace within the menu's HTML.

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* Accepts 'preserve' or 'discard'. Default 'preserve'.

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* }

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* @return void|string|false Void if 'echo' argument is true, menu output if 'echo' is false.

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* False if there are no items or no menu was found.

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*/

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function wp_nav_menu( $args = array() ) {

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static $menu_id_slugs = array();

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$defaults = array(

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'menu' => '',

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'container' => 'div',

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'container_class' => '',

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'container_id' => '',

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'container_aria_label' => '',

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'menu_class' => 'menu',

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'menu_id' => '',

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'echo' => true,

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'fallback_cb' => 'wp_page_menu',

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'before' => '',

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'after' => '',

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'link_before' => '',

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'link_after' => '',

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'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',

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'item_spacing' => 'preserve',

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'depth' => 0,

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'walker' => '',

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'theme_location' => '',

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);

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$args = wp_parse_args( $args, $defaults );

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if ( ! in_array( $args['item_spacing'], array( 'preserve', 'discard' ), true ) ) {

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// Invalid value, fall back to default.

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$args['item_spacing'] = $defaults['item_spacing'];

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}

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/**

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* Filters the arguments used to display a navigation menu.

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*

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* @since 3.0.0

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*

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* @see wp_nav_menu()

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*

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* @param array $args Array of wp_nav_menu() arguments.

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*/

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$args = apply_filters( 'wp_nav_menu_args', $args );

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$args = (object) $args;

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/**

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* Filters whether to short-circuit the wp_nav_menu() output.

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*

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* Returning a non-null value from the filter will short-circuit wp_nav_menu(),

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* echoing that value if $args->echo is true, returning that value otherwise.

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*

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* @since 3.9.0

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*

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* @see wp_nav_menu()

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*

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* @param string|null $output Nav menu output to short-circuit with. Default null.

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* @param stdClass $args An object containing wp_nav_menu() arguments.

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*/

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$nav_menu = apply_filters( 'pre_wp_nav_menu', null, $args );

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if ( null !== $nav_menu ) {

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if ( $args->echo ) {

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echo $nav_menu;

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return;

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}

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return $nav_menu;

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}

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// Get the nav menu based on the requested menu.

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$menu = wp_get_nav_menu_object( $args->menu );

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// Get the nav menu based on the theme_location.

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$locations = get_nav_menu_locations();

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if ( ! $menu && $args->theme_location && $locations && isset( $locations[ $args->theme_location ] ) ) {

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$menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] );

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}

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// Get the first menu that has items if we still can't find a menu.

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if ( ! $menu && ! $args->theme_location ) {

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$menus = wp_get_nav_menus();

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foreach ( $menus as $menu_maybe ) {

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$menu_items = wp_get_nav_menu_items( $menu_maybe->term_id, array( 'update_post_term_cache' => false ) );

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if ( $menu_items ) {

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$menu = $menu_maybe;

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break;

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}

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}

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}

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if ( empty( $args->menu ) ) {

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$args->menu = $menu;

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}

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// If the menu exists, get its items.

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if ( $menu && ! is_wp_error( $menu ) && ! isset( $menu_items ) ) {

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$menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );

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}

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/*

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* If no menu was found:

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* - Fall back (if one was specified), or bail.

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*

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* If no menu items were found:

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* - Fall back, but only if no theme location was specified.

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* - Otherwise, bail.

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*/

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if ( ( ! $menu || is_wp_error( $menu ) || ( isset( $menu_items ) && empty( $menu_items ) && ! $args->theme_location ) )

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&& isset( $args->fallback_cb ) && $args->fallback_cb && is_callable( $args->fallback_cb ) ) {

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return call_user_func( $args->fallback_cb, (array) $args );

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}

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if ( ! $menu || is_wp_error( $menu ) ) {

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return false;

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}

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$nav_menu = '';

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$items = '';

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$show_container = false;

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if ( $args->container ) {

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/**

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* Filters the list of HTML tags that are valid for use as menu containers.

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*

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* @since 3.0.0

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*

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* @param string[] $tags The acceptable HTML tags for use as menu containers.

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* Default is array containing 'div' and 'nav'.

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*/

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$allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );

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if ( is_string( $args->container ) && in_array( $args->container, $allowed_tags, true ) ) {

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$show_container = true;

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$class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-' . $menu->slug . '-container"';

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$id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : '';

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$aria_label = ( 'nav' === $args->container && $args->container_aria_label ) ? ' aria-label="' . esc_attr( $args->container_aria_label ) . '"' : '';

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$nav_menu .= '<' . $args->container . $id . $class . $aria_label . '>';

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}

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}

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// Set up the $menu_item variables.

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_wp_menu_item_classes_by_context( $menu_items );

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$sorted_menu_items = array();

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$menu_items_with_children = array();

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foreach ( (array) $menu_items as $menu_item ) {

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/*

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* Fix invalid `menu_item_parent`. See: https://core.trac.wordpress.org/ticket/56926.

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* Compare as strings. Plugins may change the ID to a string.

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*/

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if ( (string) $menu_item->ID === (string) $menu_item->menu_item_parent ) {

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$menu_item->menu_item_parent = 0;

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}

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$sorted_menu_items[ $menu_item->menu_order ] = $menu_item;

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if ( $menu_item->menu_item_parent ) {

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$menu_items_with_children[ $menu_item->menu_item_parent ] = true;

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}

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}

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// Add the menu-item-has-children class where applicable.

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if ( $menu_items_with_children ) {

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foreach ( $sorted_menu_items as &$menu_item ) {

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if ( isset( $menu_items_with_children[ $menu_item->ID ] ) ) {

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$menu_item->classes[] = 'menu-item-has-children';

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}

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}

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}

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unset( $menu_items, $menu_item );

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/**

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* Filters the sorted list of menu item objects before generating the menu's HTML.

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*

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* @since 3.1.0

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*

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* @param array $sorted_menu_items The menu items, sorted by each menu item's menu order.

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* @param stdClass $args An object containing wp_nav_menu() arguments.

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*/

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$sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args );

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$items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );

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unset( $sorted_menu_items );

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// Attributes.

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if ( ! empty( $args->menu_id ) ) {

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$wrap_id = $args->menu_id;

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} else {

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$wrap_id = 'menu-' . $menu->slug;

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while ( in_array( $wrap_id, $menu_id_slugs, true ) ) {

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if ( preg_match( '#-(\d+)$#', $wrap_id, $matches ) ) {

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$wrap_id = preg_replace( '#-(\d+)$#', '-' . ++$matches[1], $wrap_id );

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} else {

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$wrap_id = $wrap_id . '-1';

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}

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}

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}

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$menu_id_slugs[] = $wrap_id;

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$wrap_class = $args->menu_class ? $args->menu_class : '';

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/**

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* Filters the HTML list content for navigation menus.

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*

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* @since 3.0.0

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*

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* @see wp_nav_menu()

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*

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* @param string $items The HTML list content for the menu items.

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* @param stdClass $args An object containing wp_nav_menu() arguments.

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*/

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$items = apply_filters( 'wp_nav_menu_items', $items, $args );

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/**

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* Filters the HTML list content for a specific navigation menu.

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*

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* @since 3.0.0

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*

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* @see wp_nav_menu()

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*

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* @param string $items The HTML list content for the menu items.

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* @param stdClass $args An object containing wp_nav_menu() arguments.

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*/

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$items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );

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// Don't print any markup if there are no items at this point.

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if ( empty( $items ) ) {

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return false;

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}

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$nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items );

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unset( $items );

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if ( $show_container ) {

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$nav_menu .= '</' . $args->container . '>';

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}

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/**

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* Filters the HTML content for navigation menus.

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*

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* @since 3.0.0

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*

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* @see wp_nav_menu()

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*

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* @param string $nav_menu The HTML content for the navigation menu.

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* @param stdClass $args An object containing wp_nav_menu() arguments.

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*/

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$nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );

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if ( $args->echo ) {

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echo $nav_menu;

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} else {

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return $nav_menu;

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}

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}

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/**

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* Adds the class property classes for the current context, if applicable.

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*

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* @access private

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* @since 3.0.0

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*

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* @global WP_Query $wp_query WordPress Query object.

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* @global WP_Rewrite $wp_rewrite WordPress rewrite component.

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*

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* @param array $menu_items The current menu item objects to which to add the class property information.

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*/

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function _wp_menu_item_classes_by_context( &$menu_items ) {

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global $wp_query, $wp_rewrite;

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$queried_object = $wp_query->get_queried_object();

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$queried_object_id = (int) $wp_query->queried_object_id;

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$active_object = '';

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$active_ancestor_item_ids = array();

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$active_parent_item_ids = array();

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$active_parent_object_ids = array();

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$possible_taxonomy_ancestors = array();

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$possible_object_parents = array();

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$home_page_id = (int) get_option( 'page_for_posts' );

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if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) {

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foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) {

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if ( is_taxonomy_hierarchical( $taxonomy ) ) {

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$term_hierarchy = _get_term_hierarchy( $taxonomy );

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$terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) );

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if ( is_array( $terms ) ) {

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$possible_object_parents = array_merge( $possible_object_parents, $terms );

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$term_to_ancestor = array();

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foreach ( (array) $term_hierarchy as $ancestor => $descendents ) {

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foreach ( (array) $descendents as $desc ) {

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$term_to_ancestor[ $desc ] = $ancestor;

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}

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}

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foreach ( $terms as $desc ) {

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do {

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$possible_taxonomy_ancestors[ $taxonomy ][] = $desc;

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if ( isset( $term_to_ancestor[ $desc ] ) ) {

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$_desc = $term_to_ancestor[ $desc ];

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unset( $term_to_ancestor[ $desc ] );

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$desc = $_desc;

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} else {

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$desc = 0;

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}

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} while ( ! empty( $desc ) );

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}

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}

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}

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}

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} elseif ( ! empty( $queried_object->taxonomy ) && is_taxonomy_hierarchical( $queried_object->taxonomy ) ) {

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$term_hierarchy = _get_term_hierarchy( $queried_object->taxonomy );

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$term_to_ancestor = array();

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foreach ( (array) $term_hierarchy as $ancestor => $descendents ) {

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foreach ( (array) $descendents as $desc ) {

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$term_to_ancestor[ $desc ] = $ancestor;

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}

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}

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$desc = $queried_object->term_id;

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do {

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$possible_taxonomy_ancestors[ $queried_object->taxonomy ][] = $desc;

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if ( isset( $term_to_ancestor[ $desc ] ) ) {

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$_desc = $term_to_ancestor[ $desc ];

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unset( $term_to_ancestor[ $desc ] );

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$desc = $_desc;

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} else {

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$desc = 0;

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}

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} while ( ! empty( $desc ) );

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}

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$possible_object_parents = array_filter( $possible_object_parents );

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$front_page_url = home_url();

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$front_page_id = (int) get_option( 'page_on_front' );

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$privacy_policy_page_id = (int) get_option( 'wp_page_for_privacy_policy' );

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foreach ( (array) $menu_items as $key => $menu_item ) {

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$menu_items[ $key ]->current = false;

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$classes = (array) $menu_item->classes;

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$classes[] = 'menu-item';

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$classes[] = 'menu-item-type-' . $menu_item->type;

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$classes[] = 'menu-item-object-' . $menu_item->object;

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// This menu item is set as the 'Front Page'.

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if ( 'post_type' === $menu_item->type && $front_page_id === (int) $menu_item->object_id ) {

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$classes[] = 'menu-item-home';

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}

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// This menu item is set as the 'Privacy Policy Page'.

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if ( 'post_type' === $menu_item->type && $privacy_policy_page_id === (int) $menu_item->object_id ) {

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$classes[] = 'menu-item-privacy-policy';

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}

[413] Fix | Delete

[414] Fix | Delete

// If the menu item corresponds to a taxonomy term for the currently queried non-hierarchical post object.

[415] Fix | Delete

if ( $wp_query->is_singular && 'taxonomy' === $menu_item->type

[416] Fix | Delete

&& in_array( (int) $menu_item->object_id, $possible_object_parents, true )

[417] Fix | Delete

) {

[418] Fix | Delete

$active_parent_object_ids[] = (int) $menu_item->object_id;

[419] Fix | Delete

$active_parent_item_ids[] = (int) $menu_item->db_id;

[420] Fix | Delete

$active_object = $queried_object->post_type;

[421] Fix | Delete

[422] Fix | Delete

// If the menu item corresponds to the currently queried post or taxonomy object.

[423] Fix | Delete

} elseif (

[424] Fix | Delete

(int) $menu_item->object_id === $queried_object_id

[425] Fix | Delete

&& (

[426] Fix | Delete

( ! empty( $home_page_id ) && 'post_type' === $menu_item->type

[427] Fix | Delete

&& $wp_query->is_home && $home_page_id === (int) $menu_item->object_id )

[428] Fix | Delete

|| ( 'post_type' === $menu_item->type && $wp_query->is_singular )

[429] Fix | Delete

|| ( 'taxonomy' === $menu_item->type

[430] Fix | Delete

&& ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax )

[431] Fix | Delete

&& $queried_object->taxonomy === $menu_item->object )

[432] Fix | Delete

)

[433] Fix | Delete

) {

[434] Fix | Delete

$classes[] = 'current-menu-item';

[435] Fix | Delete

$menu_items[ $key ]->current = true;

[436] Fix | Delete

$ancestor_id = (int) $menu_item->db_id;

[437] Fix | Delete

[438] Fix | Delete

while (

[439] Fix | Delete

( $ancestor_id = (int) get_post_meta( $ancestor_id, '_menu_item_menu_item_parent', true ) )

[440] Fix | Delete

&& ! in_array( $ancestor_id, $active_ancestor_item_ids, true )

[441] Fix | Delete

) {

[442] Fix | Delete

$active_ancestor_item_ids[] = $ancestor_id;

[443] Fix | Delete

}

[444] Fix | Delete

[445] Fix | Delete

if ( 'post_type' === $menu_item->type && 'page' === $menu_item->object ) {

[446] Fix | Delete

// Back compat classes for pages to match wp_page_menu().

[447] Fix | Delete

$classes[] = 'page_item';

[448] Fix | Delete

$classes[] = 'page-item-' . $menu_item->object_id;

[449] Fix | Delete

$classes[] = 'current_page_item';

[450] Fix | Delete

}

[451] Fix | Delete

[452] Fix | Delete

$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;

[453] Fix | Delete

$active_parent_object_ids[] = (int) $menu_item->post_parent;

[454] Fix | Delete

$active_object = $menu_item->object;

[455] Fix | Delete

[456] Fix | Delete

// If the menu item corresponds to the currently queried post type archive.

[457] Fix | Delete

} elseif (

[458] Fix | Delete

'post_type_archive' === $menu_item->type

[459] Fix | Delete

&& is_post_type_archive( array( $menu_item->object ) )

[460] Fix | Delete

) {

[461] Fix | Delete

$classes[] = 'current-menu-item';

[462] Fix | Delete

$menu_items[ $key ]->current = true;

[463] Fix | Delete

$ancestor_id = (int) $menu_item->db_id;

[464] Fix | Delete

[465] Fix | Delete

while (

[466] Fix | Delete

( $ancestor_id = (int) get_post_meta( $ancestor_id, '_menu_item_menu_item_parent', true ) )

[467] Fix | Delete

&& ! in_array( $ancestor_id, $active_ancestor_item_ids, true )

[468] Fix | Delete

) {

[469] Fix | Delete

$active_ancestor_item_ids[] = $ancestor_id;

[470] Fix | Delete

}

[471] Fix | Delete

[472] Fix | Delete

$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;

[473] Fix | Delete

[474] Fix | Delete

// If the menu item corresponds to the currently requested URL.

[475] Fix | Delete

} elseif ( 'custom' === $menu_item->object && isset( $_SERVER['HTTP_HOST'] ) ) {

[476] Fix | Delete

$_root_relative_current = untrailingslashit( $_SERVER['REQUEST_URI'] );

[477] Fix | Delete

[478] Fix | Delete

// If it's the customize page then it will strip the query var off the URL before entering the comparison block.

[479] Fix | Delete

if ( is_customize_preview() ) {

[480] Fix | Delete

$_root_relative_current = strtok( untrailingslashit( $_SERVER['REQUEST_URI'] ), '?' );

[481] Fix | Delete

}

[482] Fix | Delete

[483] Fix | Delete

$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_root_relative_current );

[484] Fix | Delete

$raw_item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url;

[485] Fix | Delete

$item_url = set_url_scheme( untrailingslashit( $raw_item_url ) );

[486] Fix | Delete

$_indexless_current = untrailingslashit( preg_replace( '/' . preg_quote( $wp_rewrite->index, '/' ) . '$/', '', $current_url ) );

[487] Fix | Delete

[488] Fix | Delete

$matches = array(

[489] Fix | Delete

$current_url,

[490] Fix | Delete

urldecode( $current_url ),

[491] Fix | Delete

$_indexless_current,

[492] Fix | Delete

urldecode( $_indexless_current ),

[493] Fix | Delete

$_root_relative_current,

[494] Fix | Delete

urldecode( $_root_relative_current ),

[495] Fix | Delete

);

[496] Fix | Delete

[497] Fix | Delete

if ( $raw_item_url && in_array( $item_url, $matches, true ) ) {

[498] Fix | Delete

$classes[] = 'current-menu-item';

[499] Fix | Delete