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Wordpress breadcrumbs based on wp_nav_menu instead of page structure

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Thanks to Stephen Harris for this > http://wordpress.stackexchange.com/questions/50425/show-current-navigation-path-from-menu

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  1. /*  
  2. --- new walker class to create breadcrumb from nav menu structure using wp_nav_menu -------
  3.  
  4. use like:
  5.  
  6. wp_nav_menu( array( 
  7.     'container' => 'none', 
  8.     'theme_location' => 'primary',
  9.     'walker'=> new bi_BreadCrumbWalker, 
  10.     'items_wrap' => '<div id="breadcrumb-%1$s" class="%2$s">%3$s</div>'
  11. ) );
  12.  
  13.  
  14. */
  15. class bi_BreadCrumbWalker extends Walker{
  16.  
  17.     var $tree_type = array( 'post_type', 'taxonomy', 'custom' );
  18.  
  19.     /**
  20.      * @see Walker::$db_fields
  21.      * @var array
  22.      */
  23.     var $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' );
  24.  
  25.     /**
  26.      * delimiter for crumbs
  27.      * @var string
  28.      */
  29.     var $delimiter = ' > ';
  30.  
  31.     /**
  32.      * @see Walker::start_el()
  33.      *
  34.      * @param string $output Passed by reference. Used to append additional content.
  35.      * @param object $item Menu item data object.
  36.      * @param int $depth Depth of menu item.
  37.      * @param int $current_page Menu item ID.
  38.      * @param object $args
  39.      */
  40.     function start_el(&$output, $item, $depth, $args) {
  41.  
  42.         //Check if menu item is an ancestor of the current page
  43.         $classes = empty( $item->classes ) ? array() : (array) $item->classes;
  44.         $current_identifiers = array( 'current-menu-item', 'current-menu-parent', 'current-menu-ancestor' ); 
  45.         $ancestor_of_current = array_intersect( $current_identifiers, $classes );     
  46.  
  47.  
  48.         if( $ancestor_of_current ){
  49.             $title = apply_filters( 'the_title', $item->title, $item->ID );
  50.  
  51.             //Preceed with delimter for all but the first item.
  52.             if( 0 != $depth )
  53.                 $output .= $this->delimiter;
  54.  
  55.             //Link tag attributes
  56.             $attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
  57.             $attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
  58.             $attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
  59.             $attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';
  60.  
  61.             //Add to the HTML output
  62.             //$output .= '<a'. $attributes .'>'.$title.'</a>';
  63.  
  64. 			// added by me to remove the link on the current page item
  65. 			if ( in_array("current-menu-item", $classes) ) {
  66. 				$output .= '<span class="current-page">'.$title.'</span>';
  67. 			} else {
  68. 				$output .= '<a'. $attributes .'>'.$title.'</a>';
  69. 			}
  70.  
  71.         }
  72.     }
  73. }

URL: http://wordpress.stackexchange.com/questions/50425/show-current-navigation-path-from-menu

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