current_menu_id_bootstrap; // Assign the dynamic id for use inside the dropdown menu, ie, sub-menu for Bootstrap $id = 'aria-labelledby="navbar-dropdown-menu-link-' . $current_menu_id->ID . '"'; if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) { $t = ''; $n = ''; } else { $t = "\t"; $n = "\n"; } $indent = str_repeat( $t, $depth ); /** * Add the classes for the dropdown menu in WordPress * * 1. For WordPress default: '.sub-menu' * 2. For Bootstrap Sub-Menu: '.dropdown-menu' */ $classes = array( 'sub-menu', 'dropdown-menu' ); /** * Filters the CSS class(es) applied to a menu list element. * * @since 4.8.0 * * @param array $classes The CSS classes that are applied to the menu `

for Bootstrap Navigation * Add the current menu id for the sub-menu toggle feature for Bootstrap */ $output .= "{$n}{$indent}

{$n}"; } /** * Ends the list of after the elements are added. * * @since 3.0.0 * @see Walker::end_lvl() * * @param string $output Passed by reference. Used to append additional content. * @param int $depth Depth of menu item. Used for padding. * @param stdClass $args An object of wp_nav_menu() arguments. */ public function end_lvl( &$output, $depth = 0, $args = array() ) { if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) { $t = ''; $n = ''; } else { $t = "\t"; $n = "\n"; } $indent = str_repeat( $t, $depth ); /** * Change

tag for Bootstrap */ $classes[] = 'nav-item'; /** * Add class '.active' inside
tag for Bootstrap active menu as well as for the parent menu, which have the active sub-menu */ if ( in_array( 'current-menu-item', $classes ) || in_array( 'current-menu-parent', $classes ) ) { $classes[] = 'active'; } /** * Add class '.dropdown' inside
tag for Bootstrap dropdown menu, ie,
having sub-menu */ if ( in_array( 'menu-item-has-children', $classes ) ) { $classes[] = 'dropdown'; } /** * Filters the arguments for a single nav menu item. * * @since 4.4.0 * * @param stdClass $args An object of wp_nav_menu() arguments. * @param WP_Post $item Menu item data object. * @param int $depth Depth of menu item. Used for padding. */ $args = apply_filters( 'nav_menu_item_args', $args, $item, $depth ); /** * Filters the CSS class(es) applied to a menu item's list item element. * * @since 3.0.0 * @since 4.1.0 The `$depth` parameter was added. * * @param array $classes The CSS classes that are applied to the menu item's `
` element. * @param WP_Post $item The current menu item. * @param stdClass $args An object of wp_nav_menu() arguments. * @param int $depth Depth of menu item. Used for padding. */ $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) ); $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : ''; /** * Filters the ID applied to a menu item's list item element. * * @since 3.0.1 * @since 4.1.0 The `$depth` parameter was added. * * @param string $menu_id The ID that is applied to the menu item's `
` element. * @param WP_Post $item The current menu item. * @param stdClass $args An object of wp_nav_menu() arguments. * @param int $depth Depth of menu item. Used for padding. */ $id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args, $depth ); $id = $id ? ' id="' . esc_attr( $id ) . '"' : ''; /** *
is required for parent menu only in Bootstrap */ if ( $depth === 0 ) { $output .= $indent . ''; } $atts = array(); $atts['title'] = ! empty( $item->attr_title ) ? $item->attr_title : ''; $atts['target'] = ! empty( $item->target ) ? $item->target : ''; $atts['rel'] = ! empty( $item->xfn ) ? $item->xfn : ''; $atts['href'] = ! empty( $item->url ) ? $item->url : ''; /** * Add '.nav-link' class for in parent menu for Bootstrap */ if ( $depth === 0 ) { $atts['class'] = 'nav-link'; } /** * Add the attributes for in parent menu * * 1. Add '.dropdown-toggle' class for in parent menu if it has sub-menu as required for Bootstrap * 2. Add '.dropdown' as 'data-toggle' attribute in in parent menu if it has sub-menu as required for Bootstrap * 3. Add the current menu id attribute to indicate the exact menu to toggle for set in sub-menu div * 4. Add the attribute of 'true' for 'aria-haspopup' in parent menu to indicate it has sub-menus * 5. Add the attribute of 'false' for 'aria-expanded' in parent menu to indicate the sub-menus is hidden by default * 6. Add the '#' link in the tag in the parent menu if it has sub-menu as required for Bootstrap */ if ( $depth === 0 && in_array( 'menu-item-has-children', $classes ) ) { $atts['class'] .= ' dropdown-toggle'; $atts['data-toggle'] = 'dropdown'; $atts['id'] = 'navbar-dropdown-menu-link-' . $item->ID; $atts['aria-haspopup'] = "true"; $atts['aria-expanded'] = "false"; $atts['href'] = '#'; } /** * Add the attributes for in sub-menu * 1. Add '.dropdown-item' class for inside sub-menu for Bootstrap * 2. Add the current menu id attribute if you want to style the menu differently */ if ( $depth > 0 ) { $atts['class'] = 'dropdown-item'; $atts['id'] = 'menu-item-' . $item->ID; } /** * Add '.active' class inside in sub-menu for Bootstrap */ if ( in_array( 'current-menu-item', $item->classes ) ) { $atts['class'] .= ' active'; } /** * Add '.disabled' class for in menu for Bootstrap disabled class */ if ( in_array( 'disabled', $item->classes ) ) { $atts['class'] .= ' disabled'; } /** * Filters the HTML attributes applied to a menu item's anchor element. * * @since 3.6.0 * @since 4.1.0 The `$depth` parameter was added. * * @param array $atts { * The HTML attributes applied to the menu item's `` element, empty strings are ignored. * * @type string $title Title attribute. * @type string $target Target attribute. * @type string $rel The rel attribute. * @type string $href The href attribute. * } * * @param WP_Post $item The current menu item. * @param stdClass $args An object of wp_nav_menu() arguments. * @param int $depth Depth of menu item. Used for padding. */ $atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args, $depth ); $attributes = ''; foreach ( $atts as $attr => $value ) { if ( ! empty( $value ) ) { $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value ); /** * If '.disabled' class is added to the menu, add the url of '#' in it */ if ( in_array( 'disabled', $item->classes ) ) { $value = ( 'href' === $attr ) ? esc_url( '#' ) : esc_attr( $value ); } $attributes .= ' ' . $attr . '="' . $value . '"'; } } /** This filter is documented in wp-includes/post-template.php */ $title = apply_filters( 'the_title', $item->title, $item->ID ); /** * Filters a menu item's title. * * @since 4.4.0 * * @param string $title The menu item's title. * @param WP_Post $item The current menu item. * @param stdClass $args An object of wp_nav_menu() arguments. * @param int $depth Depth of menu item. Used for padding. */ $title = apply_filters( 'nav_menu_item_title', $title, $item, $args, $depth ); $item_output = $args->before; $item_output .= ''; $item_output .= $args->link_before . $title . $args->link_after; $item_output .= ''; $item_output .= $args->after; /** * Filters a menu item's starting output. * The menu item's starting output only includes `$args->before`, the opening ``, * the menu item's title, the closing ``, and `$args->after`. Currently, there is * no filter for modifying the opening and closing `
` for a menu item. * * @since 3.0.0 * * @param string $item_output The menu item's starting HTML output. * @param WP_Post $item Menu item data object. * @param int $depth Depth of menu item. Used for padding. * @param stdClass $args An object of wp_nav_menu() arguments. */ $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); } /** * Ends the element output, if needed. * * @since 3.0.0 * @see Walker::end_el() * * @param string $output Passed by reference. Used to append additional content. * @param WP_Post $item Page data object. Not used. * @param int $depth Depth of page. Not Used. * @param stdClass $args An object of wp_nav_menu() arguments. */ public function end_el( &$output, $item, $depth = 0, $args = array() ) { if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) { $t = ''; $n = ''; } else { $t = "\t"; $n = "\n"; } /** *
is required for parent menu only in Bootstrap */ if ( $depth === 0 ) { $output .= "

div wrapper for menu echo '>'; // Display the link to Add New Menu echo '

'; esc_html_e( 'Add a menu', 'serenity-lite' ); echo '

'; // Close the main

echo ''; // Close the main container div if ( $container ) { echo ''; } } } }