Menu items are stored in the posts table with a post_type of nav_menu_item. So, what you are returning is the ID of the menu item itself, not what it points to. The page/post ID that the menu item refers to is stored in the postmeta table, with a post_id that matches the menu item ID … Read more
The problem of building a tree from a flat array has been solved here with this, slightly modified, recursive solution: /** * Modification of “Build a tree from a flat array in PHP” * * Authors: @DSkinner, @ImmortalFirefly and @SteveEdson * * @link https://stackoverflow.com/a/28429487/2078474 */ function buildTree( array &$elements, $parentId = 0 ) { $branch … Read more
Although this does not directly answer the question, the code on which it is based provides the functionality. The code set is: function install_menus() { require_once dirname( __FILE__) . ‘/data.php’; $menus = get_menus_data(); if ( ! empty ( $menus ) ) foreach ( $menus as $menu ) { if ( $menu[‘build’] ) { $menu_id = … Read more
Use has_nav_menu(), and test for theme_location, rather than menu_id: <?php if ( has_nav_menu( $theme_location ) ) { // User has assigned menu to this location; // output it wp_nav_menu( array( ‘theme_location’ => $theme_location, ‘menu_class’ => ‘nav’, ‘container’ => ” ) ); } ?> You can output alternate content, by adding an else clause. EDIT You … Read more
This is the walker I used to display only children of the current menu item. Or the menu items siblings if it doesn’t have any children of its own. There are comments throughout the class explaining each section <?php class SH_Child_Only_Walker extends Walker_Nav_Menu { private $ID; private $depth; private $classes = array(); private $child_count = … Read more
[SOLVED] IT DOES NOT WORK when you are referring to an inexisting location. e.g. when you copied the code from somewhere else, or you haven’t created your menu or location yet in the dasboard. e.g. remove “, ‘theme_location’ => ‘primary’” from the following code: wp_nav_menu( array( ‘container’=> false, ‘menu_class’=> false, ‘menu_id’=> ‘ia_toplevel’, ‘theme_location’ => ‘primary’ … Read more
Using a custom Walker, the start_el() method has access to $depth param: when it is 0 the elemnt is a top one, and we can use this info to maintain an internal counter. When the counter reach a limit, we can use DOMDocument to get from full HTML output just the last element added, wrap … Read more
From class Walker_Nav_Menu: function start_lvl( &$output, $depth = 0, $args = array() ) Your child class must use the same signature: three arguments, the first one passed by reference. Every difference will raise the error you got. Note that $args defaults to an empty array, but you get an instance of stdClass, not an array. … Read more
You can achieve this using the wp_nav_menu_items hook. Let’s have a look at the following piece of code which shows the login/logout link on the primary menu location. add_filter( ‘wp_nav_menu_items’, ‘wti_loginout_menu_link’, 10, 2 ); function wti_loginout_menu_link( $items, $args ) { if ($args->theme_location == ‘primary’) { if (is_user_logged_in()) { $items .= ‘<li class=”right”><a href=”‘. wp_logout_url() .'”>’. … Read more
Method 1 You can add a constructor to your custom Walker to store some additional exclusion arguments, like: class custom_nav_walker extends Walker_Nav_Menu { function __construct( $exclude = null ) { $this->exclude = $exclude; } function skip( $item ) { return in_array($item->ID, (array)$this->exclude); // or return in_array($item->title, (array)$this->exclude); // etc. } // …inside start_el, end_el if … Read more