I am trying to dynamically add a nested ul to a list item in a wp nav menu when the walker encounters its own item $id that matches an id passed to the walker.
I created a custom walker which is required by my functions.php file. I am calling the walker inside of a sidebar script in its own sidebar.php file. My sidebar.php has this code:
if(is_singular('event')) {
$event= em_get_event($id,'post_id');
echo 'single' .$event->post_id;
global $post;
if($post->ID == $event->post_id) echo 'a match!';
if(in_array($post->ID, $em_past_exhibit_post_ids)) {
$nav_id = 117;
} else if(in_array($post->ID, $em_current_exhibit_post_ids)) {
$nav_id = 115;
} else if(in_array($post->ID, $em_future_exhibit_post_ids)) {
$nav_id = 224;
} else if(in_array($post->ID, $em_past_concert_post_ids)) {
$nav_id = 562;
} else if(in_array($post->ID, $em_current_concert_post_ids)) {
$nav_id = 558;
} else if(in_array($post->ID, $em_future_concert_post_ids)) {
$nav_id = 560;
} else {
$nav_id = 61;
}
$ptitle = get_the_title( $nav_id );
$plink = get_the_permalink( $nav_id );
echo 'nav id is: ' . $nav_id;
$defaults = array(
'theme_location' => 'my-header-menu',
'menu' => '',
'container' => '',
'container_class' => '',
'container_id' => '',
'menu_class' => '',
'menu_id' => 'my-events',
'echo' => true,
'fallback_cb' => 'wp_page_menu',
'before' => '',
'after' => '',
'link_before' => '',
'link_after' => '',
'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',
'depth' => 3,
'walker' => new my_event_walker,
'walker_nav_id' => '61',
'walker_el_name' => 'test'
);
function modify_nav_menu_args( $args )
{
if( 'my-header-menu' == $args['theme_location'] )
{
global $post;
$id = $post->ID;
$args['link_after'] = 'id is:' . $id;
}
return $args;
}
add_filter( 'wp_nav_menu_args', 'modify_nav_menu_args' );
wp_nav_menu( $defaults );
In my actual walker, in the start_el function, where output is structured, I thought I could add (at approx. line 141 of just the Walker Nav Menu class ) `$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
/** This filter is documented in wp-includes/post-template.php */
$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ).$args->link_after;
if($item->ID = $args->walker_nav_id) {
$item_output .= '<ul><li>' . $args->walker_el_name. '</li></ul>';
}
$item_output .= '</a>';
$item_output .= $args->after;
`
the site is only local right now. But I'm wondering how I would a. pass the $nav_id to the walker class and b. how and where I would access the item ids that walker is 'walking' to create the menu so that I can compare the two. Do I need to pass that as an argument to link_after or shouldn't I be able to modify the walker directly? Thank you for your thoughts.
