Posted By

Huskie on 09/09/11

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Last Edited at 09/09/11 07:12pm

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WordPress Custom Walker Class to get Sister Pages for Sub-Menu

/ Published in: PHP

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/**
 * Custom Walker to extract current sub-menu
 */

class Custom_Walker_Nav_Sub_Menu extends Walker_Nav_Menu {

var $found_parents = array();

function start_el(&$output, $item, $depth, $args) {

global $wp_query;
		
		//this only works for second level sub navigations
		$parent_item_id = 0;

$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

$class_names = $value = '';

$classes = empty( $item->classes ) ? array() : (array) $item->classes;

$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
		$class_names = ' class="' . esc_attr( $class_names ) . '"';
		
		
	 if ( ($item->menu_item_parent==0) && (strpos($class_names, 'current-menu-parent')) ) { 
		 $output.= '
<li>';
		 }

// Checks if the current element is in the current selection
		if (strpos($class_names, 'current-menu-item')
			|| strpos($class_names, 'current-menu-parent')
			|| strpos($class_names, 'current-menu-ancestor')
			|| (is_array($this->found_parents) && in_array( $item->menu_item_parent, $this->found_parents )) ) {

// Keep track of all selected parents
			$this->found_parents[] = $item->ID;

//check if the item_parent matches the current item_parent
			if($item->menu_item_parent!=$parent_item_id){

$output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';

$attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
				$attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
				$attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
				$attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';

$item_output = $args->before;
				$item_output .= '<a'. $attributes .'>';
				$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
				$item_output .= '</a>';
				$item_output .= $args->after;
				
				$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
			}
			
			
		}
	}
	
	function end_el(&$output, $item, $depth) {
	  // Closes only the opened li
	  if ( is_array($this->found_parents) && in_array( $item->ID, $this->found_parents ) ) {
	      $output .= "</li>\n";
    }
  }

URL: http://darrenhuskie.com/

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