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Enhance a walker function in wordpress for better sub-menu styling (2 posts)

  1. 21cdb
    Member
    Posted 2 years ago #

    Hey i'm using this function to extend my wordpress menu

    //improve menu output and allow descriptions
    class My_Walker extends Walker_Nav_Menu
    {
    	function start_el(&$output, $item, $depth, $args) {
    		global $wp_query;
    		$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 ) . '"';
    
    		$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 ) . $args->link_after;
    		if (strlen($item->description)>2) {
          $item_output .= '<br /><span class="sub">' . $item->description . '</span></a>';
    } else {
         $item_output .= '</a>';
    }
    		$item_output .= $args->after;
    
    		$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
    	}
    }
    
    //strip sanitizers from menu description
    remove_filter('nav_menu_description', 'strip_tags');

    It works very well but i'm missing some additional classes for the sub-menus (due to styling purpose.

    Is someone able to help me out in combining the function above with the following one:

    class UL_Class_Walker extends Walker_Nav_Menu {
      function start_lvl(&$output, $depth) {
        $indent = str_repeat("\t", $depth);
        $output .= "\n$indent<ul class=\"sub-menu level-".$depth."\"><span></span>\n";
      }
    }

    Thanks in advance!

  2. maxxsnake
    Member
    Posted 2 years ago #

    Coincidentally, I'm also using the top code and needed to implement something at the sub-menu level. You can just add the second function into the first, then call the first walker. Mine looks like:

    class description_walker extends Walker_Nav_Menu
    {
          function start_el(&$output, $item, $depth, $args)
          {
               global $wp_query;
               $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 ) . '"';
    
               $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        ) .'"' : '';
    
               $prepend = '<div class="top sans">';
               $append = '</div>';
               $description  = ! empty( $item->title ) ? '<div class="bottom">'.esc_attr( $item->attr_title ).'</div>' : '';
    
               if($depth != 0)
               {
                         $description = $append = $prepend = "";
               }
    
                $item_output = $args->before;
                $item_output .= '<a'. $attributes .'>';
                $item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append;
                $item_output .= $description.$args->link_after;
                $item_output .= '</a><div class="hidden"><div class="back"></div></div>';
                $item_output .= $args->after;
    
                $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
    		}
    
    		function start_lvl(&$output, $depth) {
    		    $indent = str_repeat("\t", $depth);
    		    $output .= "\n$indent<ul class=\"sub-menu level-".$depth."\"><span></span>\n";
    		}
    }

    Although I modified a few other things internally as needed and haven't finished modding the second part (thanks for that) yet, but it is exporting the markup into the sub-menu appropriately.

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