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 $child_count = … Read more
[SOLVED] IT DOES NOT WORK when you are referring to an inexisting location. e.g. when you copied the code from somewhere else, or you haven’t created your menu or location yet in the dasboard. e.g. remove “, ‘theme_location’ => ‘primary’” from the following code: wp_nav_menu( array( ‘container’=> false, ‘menu_class’=> false, ‘menu_id’=> ‘ia_toplevel’, ‘theme_location’ => ‘primary’ … Read more
A better and simpler approach: function add_first_and_last($items) { $items[1]->classes[] = ‘first-menu-item’; $items[count($items)]->classes[] = ‘last-menu-item’; return $items; } add_filter(‘wp_nav_menu_objects’, ‘add_first_and_last’);
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
If you know the menu’s slug, then things are easier, otherwise you can use this function to get the menu at a specified location. <?php function wpse45700_get_menu_by_location( $location ) { if( empty($location) ) return false; $locations = get_nav_menu_locations(); if( ! isset( $locations[$location] ) ) return false; $menu_obj = get_term( $locations[$location], ‘nav_menu’ ); return $menu_obj; } … Read more
Use a custom walker, remove anything you don’t need and add your classes. Here is a walker I use to get a list with clean markup: T5_Nav_Menu_Walker_Simple. Your could also filter ‘nav_menu_css_class’ or ‘wp_nav_menu_items’. But a walker class is easier to understand and to control in my opinion.
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