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Wordpress Bootstrap navbar walker For WordPress version 3.0.0+ and Bootstrap 3+
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<?php | |
/** | |
* Wordpress Bootstrap navbar walker | |
* | |
* For WordPress version 3.0.0+ and Bootstrap 3+ | |
* | |
* Set Title Attribute to "divider" for submenu divider. | |
* Set Title Attribute to "header" for submenu header. | |
* | |
* Code example: | |
* <code> | |
* <nav class="navbar navbar-inverse" role="navigation"> | |
* <div class="navbar-header"> | |
* <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse"> | |
* <span class="sr-only">Toggle navigation</span> | |
* <span class="icon-bar"></span> | |
* <span class="icon-bar"></span> | |
* <span class="icon-bar"></span> | |
* </button> | |
* <a class="navbar-brand" href="<?php echo home_url(); ?>"> | |
* <?php bloginfo('name'); ?> | |
* </a> | |
* </div> | |
* | |
* <div class="collapse navbar-collapse" id="navbar-collapse"> | |
* <?php wp_nav_menu(array( | |
* 'menu' => 'main', // Name of menu in WordPress. | |
* 'depth' => 2, // Bootstrap only supports two levels. | |
* 'menu_class' => 'nav navbar-nav', // 'nav navbar-nav' is required by Bootstrap. | |
* 'walker' => new bootstrap_navbar_walker() | |
* )); ?> | |
* </div> | |
* </nav> | |
* </code> | |
* | |
* @link http://codex.wordpress.org/Function_Reference/wp_nav_menu | |
* | |
* Note: | |
* When using this walker, only these arguments to wp_nav_menu are supported: | |
* $menu, $walker, $link_befrore, $link_after and $menu_class. | |
* | |
* @author Ola Waljefors | |
*/ | |
class bootstrap_navbar_walker extends Walker_Nav_Menu | |
{ | |
/** | |
* start_lvl | |
* | |
* @param string $output HTML output. | |
* @param integer $depth Menus total depth. | |
* @param array $args Parameters. | |
*/ | |
public function start_lvl(&$output, $depth = 0, $args = array()) | |
{ | |
// Class name dropdown-menu is Bootstrap, sub-menu is WordPress. | |
$output .= "\n<ul class=\"dropdown-menu sub-menu\">\n"; | |
} | |
/** | |
* start_el | |
* | |
* @param string $output HTML output. | |
* @param object $item Current menu item. | |
* @param integer $depth Current items depth. | |
* @param array $args Parameters. | |
*/ | |
public function start_el(&$output, $item, $depth = 0, $args = array()) | |
{ | |
// WP classes. | |
$classes = empty($item->classes) ? array() : (array) $item->classes; | |
$classes[] = 'menu-item-' . $item->ID; | |
// Add Bootstraps active menu class. | |
if (in_array('current-menu-item', $classes)) { | |
$classes[] = 'active'; | |
} | |
// Join and escape class names. | |
$class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args)); | |
$class_names = $class_names ? esc_attr($class_names) : ''; | |
// Apply and escape id | |
$id = apply_filters('nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args ); | |
$id = $id ? 'id="' . esc_attr($id) . '"' : ''; | |
// Anchor attributes | |
$atts = array( | |
'title' => !empty($item->attr_title) ? $item->attr_title : '', | |
'target' => !empty($item->target) ? $item->target : '', | |
'rel' => !empty($item->xfn) ? $item->xfn : '', | |
'href' => !empty($item->url) ? $item->url : '', | |
); | |
$atts = apply_filters('nav_menu_link_attributes', $atts, $item, $args); | |
$attributes = ''; | |
foreach ($atts as $attr => $value) { | |
if (!empty($value)) { | |
$value = ('href' === $attr) ? esc_url($value) : esc_attr($value); | |
$attributes .= "$attr=\"$value\" "; | |
} | |
} | |
// Check if title is divider, header or other menu item. | |
if ($item->attr_title == 'divider') { | |
$output .= "<li $id class=\"divider\">"; | |
} elseif ($item->attr_title == 'header') { | |
$output .= "<li $id class=\"dropdown-header\">{$args->link_before}{$item->title}{$args->link_after}"; | |
} else { | |
// If menu item has children add Bootstrap dropdown functions. | |
if(in_array('menu-item-has-children', $classes)) { | |
$output .= "<li $id class=\"dropdown $class_names\">" | |
. "<a href=\"#\" class=\"dropdown-toggle\" data-toggle=\"dropdown\">{$args->link_before}{$item->title}{$args->link_after} <b class=\"caret\"></b></a>"; | |
} else { | |
$output .= "<li $id class=\"$class_names\">" | |
. "<a $attributes>{$args->link_before}{$item->title}{$args->link_after}</a>"; | |
} | |
} | |
} | |
} |
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