| 1 | <?php |
| 2 | /** |
| 3 | * Navigation Menu template functions |
| 4 | * |
| 5 | * @package WordPress |
| 6 | * @subpackage Nav_Menus |
| 7 | * @since 3.0.0 |
| 8 | */ |
| 9 | |
| 10 | /** |
| 11 | * Create HTML list of nav menu items. |
| 12 | * |
| 13 | * @package WordPress |
| 14 | * @since 3.0.0 |
| 15 | * @uses Walker |
| 16 | */ |
| 17 | class Walker_Nav_Menu extends Walker { |
| 18 | /** |
| 19 | * @see Walker::$tree_type |
| 20 | * @since 3.0.0 |
| 21 | * @var string |
| 22 | */ |
| 23 | var $tree_type = array( 'post_type', 'taxonomy', 'custom' ); |
| 24 | |
| 25 | /** |
| 26 | * @see Walker::$db_fields |
| 27 | * @since 3.0.0 |
| 28 | * @todo Decouple this. |
| 29 | * @var array |
| 30 | */ |
| 31 | var $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' ); |
| 32 | |
| 33 | /** |
| 34 | * @see Walker::start_lvl() |
| 35 | * @since 3.0.0 |
| 36 | * |
| 37 | * @param string $output Passed by reference. Used to append additional content. |
| 38 | * @param int $depth Depth of page. Used for padding. |
| 39 | */ |
| 40 | function start_lvl(&$output, $depth) { |
| 41 | $indent = str_repeat("\t", $depth); |
| 42 | $output .= "\n$indent<ul class=\"sub-menu\">\n"; |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * @see Walker::end_lvl() |
| 47 | * @since 3.0.0 |
| 48 | * |
| 49 | * @param string $output Passed by reference. Used to append additional content. |
| 50 | * @param int $depth Depth of page. Used for padding. |
| 51 | */ |
| 52 | function end_lvl(&$output, $depth) { |
| 53 | $indent = str_repeat("\t", $depth); |
| 54 | $output .= "$indent</ul>\n"; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * @see Walker::start_el() |
| 59 | * @since 3.0.0 |
| 60 | * |
| 61 | * @param string $output Passed by reference. Used to append additional content. |
| 62 | * @param object $item Menu item data object. |
| 63 | * @param int $depth Depth of menu item. Used for padding. |
| 64 | * @param int $current_page Menu item ID. |
| 65 | * @param object $args |
| 66 | */ |
| 67 | function start_el(&$output, $item, $depth, $args) { |
| 68 | global $wp_query; |
| 69 | $indent = ( $depth ) ? str_repeat( "\t", $depth ) : ''; |
| 70 | |
| 71 | $class_names = $value = ''; |
| 72 | |
| 73 | $classes = empty( $item->classes ) ? array() : (array) $item->classes; |
| 74 | $classes[] = 'menu-item-' . $item->ID; |
| 75 | |
| 76 | $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) ); |
| 77 | $class_names = ' class="' . esc_attr( $class_names ) . '"'; |
| 78 | |
| 79 | $id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args ); |
| 80 | $id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : ''; |
| 81 | |
| 82 | $output .= $indent . '<li' . $id . $value . $class_names .'>'; |
| 83 | |
| 84 | $attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : ''; |
| 85 | $attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : ''; |
| 86 | $attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : ''; |
| 87 | $attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : ''; |
| 88 | |
| 89 | $item_output = $args->before; |
| 90 | $item_output .= '<a'. $attributes .'>'; |
| 91 | $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after; |
| 92 | $item_output .= '</a>'; |
| 93 | $item_output .= $args->after; |
| 94 | |
| 95 | $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * @see Walker::end_el() |
| 100 | * @since 3.0.0 |
| 101 | * |
| 102 | * @param string $output Passed by reference. Used to append additional content. |
| 103 | * @param object $item Page data object. Not used. |
| 104 | * @param int $depth Depth of page. Not Used. |
| 105 | */ |
| 106 | function end_el(&$output, $item, $depth) { |
| 107 | $output .= "</li>\n"; |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Displays a navigation menu. |
| 113 | * |
| 114 | * Optional $args contents: |
| 115 | * |
| 116 | * menu - The menu that is desired. Accepts (matching in order) id, slug, name. Defaults to blank. |
| 117 | * menu_class - CSS class to use for the ul element which forms the menu. Defaults to 'menu'. |
| 118 | * menu_id - The ID that is applied to the ul element which forms the menu. Defaults to the menu slug, incremented. |
| 119 | * container - Whether to wrap the ul, and what to wrap it with. Defaults to 'div'. |
| 120 | * container_class - the class that is applied to the container. Defaults to 'menu-{menu slug}-container'. |
| 121 | * container_id - The ID that is applied to the container. Defaults to blank. |
| 122 | * fallback_cb - If the menu doesn't exists, a callback function will fire. Defaults to 'wp_page_menu'. |
| 123 | * before - Text before the link text. |
| 124 | * after - Text after the link text. |
| 125 | * link_before - Text before the link. |
| 126 | * link_after - Text after the link. |
| 127 | * echo - Whether to echo the menu or return it. Defaults to echo. |
| 128 | * depth - how many levels of the hierarchy are to be included. 0 means all. Defaults to 0. |
| 129 | * walker - allows a custom walker to be specified. |
| 130 | * theme_location - the location in the theme to be used. Must be registered with register_nav_menu() in order to be selectable by the user. |
| 131 | * |
| 132 | * @since 3.0.0 |
| 133 | * |
| 134 | * @param array $args Arguments |
| 135 | */ |
| 136 | function wp_nav_menu( $args = array() ) { |
| 137 | static $menu_id_slugs = array(); |
| 138 | |
| 139 | $defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu', 'menu_id' => '', |
| 140 | 'echo' => true, 'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '', |
| 141 | 'depth' => 0, 'walker' => '', 'theme_location' => '' ); |
| 142 | |
| 143 | $args = wp_parse_args( $args, $defaults ); |
| 144 | $args = apply_filters( 'wp_nav_menu_args', $args ); |
| 145 | $args = (object) $args; |
| 146 | |
| 147 | // Get the nav menu based on the requested menu |
| 148 | $menu = wp_get_nav_menu_object( $args->menu ); |
| 149 | |
| 150 | // Get the nav menu based on the theme_location |
| 151 | if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_locations() ) && isset( $locations[ $args->theme_location ] ) ) |
| 152 | $menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] ); |
| 153 | |
| 154 | // get the first menu that has items if we still can't find a menu |
| 155 | if ( ! $menu && !$args->theme_location ) { |
| 156 | $menus = wp_get_nav_menus(); |
| 157 | foreach ( $menus as $menu_maybe ) { |
| 158 | if ( $menu_items = wp_get_nav_menu_items($menu_maybe->term_id) ) { |
| 159 | $menu = $menu_maybe; |
| 160 | break; |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | // If the menu exists, get its items. |
| 166 | if ( $menu && ! is_wp_error($menu) && !isset($menu_items) ) |
| 167 | $menu_items = wp_get_nav_menu_items( $menu->term_id ); |
| 168 | |
| 169 | // If no menu was found or if the menu has no items and no location was requested, call the fallback_cb if it exists |
| 170 | if ( ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) && !$args->theme_location ) ) |
| 171 | && ( function_exists($args->fallback_cb) || is_callable( $args->fallback_cb ) ) ) |
| 172 | return call_user_func( $args->fallback_cb, (array) $args ); |
| 173 | |
| 174 | // If no fallback function was specified and the menu doesn't exists, bail. |
| 175 | if ( !$menu || is_wp_error($menu) ) |
| 176 | return false; |
| 177 | |
| 178 | $nav_menu = $items = ''; |
| 179 | |
| 180 | $show_container = false; |
| 181 | if ( $args->container ) { |
| 182 | $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) ); |
| 183 | if ( in_array( $args->container, $allowed_tags ) ) { |
| 184 | $show_container = true; |
| 185 | $class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"'; |
| 186 | $id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : ''; |
| 187 | $nav_menu .= '<'. $args->container . $id . $class . '>'; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | // Set up the $menu_item variables |
| 192 | _wp_menu_item_classes_by_context( $menu_items ); |
| 193 | |
| 194 | $sorted_menu_items = array(); |
| 195 | foreach ( (array) $menu_items as $key => $menu_item ) |
| 196 | $sorted_menu_items[$menu_item->menu_order] = $menu_item; |
| 197 | |
| 198 | unset($menu_items); |
| 199 | |
| 200 | $items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args ); |
| 201 | unset($sorted_menu_items); |
| 202 | |
| 203 | // Attributes |
| 204 | if ( ! empty( $args->menu_id ) ) { |
| 205 | $slug = $args->menu_id; |
| 206 | } else { |
| 207 | $slug = 'menu-' . $menu->slug; |
| 208 | while ( in_array( $slug, $menu_id_slugs ) ) { |
| 209 | if ( preg_match( '#-(\d+)$#', $slug, $matches ) ) |
| 210 | $slug = preg_replace('#-(\d+)$#', '-' . ++$matches[1], $slug); |
| 211 | else |
| 212 | $slug = $slug . '-1'; |
| 213 | } |
| 214 | } |
| 215 | $menu_id_slugs[] = $slug; |
| 216 | $attributes = ' id="' . $slug . '"'; |
| 217 | $attributes .= $args->menu_class ? ' class="'. $args->menu_class .'"' : ''; |
| 218 | |
| 219 | $nav_menu .= '<ul'. $attributes .'>'; |
| 220 | |
| 221 | // Allow plugins to hook into the menu to add their own <li>'s |
| 222 | $items = apply_filters( 'wp_nav_menu_items', $items, $args ); |
| 223 | $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args ); |
| 224 | $nav_menu .= $items; |
| 225 | unset($items); |
| 226 | |
| 227 | $nav_menu .= '</ul>'; |
| 228 | |
| 229 | if ( $show_container ) |
| 230 | $nav_menu .= '</' . $args->container . '>'; |
| 231 | |
| 232 | $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args ); |
| 233 | |
| 234 | if ( $args->echo ) |
| 235 | echo $nav_menu; | //Cross Site Scripting
|
| 236 | else |
| 237 | return $nav_menu; |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * Add the class property classes for the current context, if applicable. |
| 242 | * |
| 243 | * @access private |
| 244 | * @since 3.0 |
| 245 | * |
| 246 | * @param array $menu_items The current menu item objects to which to add the class property information. |
| 247 | */ |
| 248 | function _wp_menu_item_classes_by_context( &$menu_items ) { |
| 249 | global $wp_query; |
| 250 | |
| 251 | $queried_object = $wp_query->get_queried_object(); |
| 252 | $queried_object_id = (int) $wp_query->queried_object_id; |
| 253 | |
| 254 | $active_object = ''; |
| 255 | $active_ancestor_item_ids = array(); |
| 256 | $active_parent_item_ids = array(); |
| 257 | $active_parent_object_ids = array(); |
| 258 | $possible_taxonomy_ancestors = array(); |
| 259 | $possible_object_parents = array(); |
| 260 | $home_page_id = (int) get_option( 'page_for_posts' ); |
| 261 | |
| 262 | if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) { |
| 263 | foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) { |
| 264 | if ( is_taxonomy_hierarchical( $taxonomy ) ) { |
| 265 | $term_hierarchy = _get_term_hierarchy( $taxonomy ); |
| 266 | $terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) ); |
| 267 | if ( is_array( $terms ) ) { |
| 268 | $possible_object_parents = array_merge( $possible_object_parents, $terms ); |
| 269 | $term_to_ancestor = array(); |
| 270 | foreach ( (array) $term_hierarchy as $anc => $descs ) { |
| 271 | foreach ( (array) $descs as $desc ) |
| 272 | $term_to_ancestor[ $desc ] = $anc; |
| 273 | } |
| 274 | |
| 275 | foreach ( $terms as $desc ) { |
| 276 | do { |
| 277 | $possible_taxonomy_ancestors[ $taxonomy ][] = $desc; |
| 278 | if ( isset( $term_to_ancestor[ $desc ] ) ) { |
| 279 | $_desc = $term_to_ancestor[ $desc ]; |
| 280 | unset( $term_to_ancestor[ $desc ] ); |
| 281 | $desc = $_desc; |
| 282 | } else { |
| 283 | $desc = 0; |
| 284 | } |
| 285 | } while ( ! empty( $desc ) ); |
| 286 | } |
| 287 | } |
| 288 | } |
| 289 | } |
| 290 | } elseif ( ! empty( $queried_object->post_type ) && is_post_type_hierarchical( $queried_object->post_type ) ) { |
| 291 | _get_post_ancestors( $queried_object ); |
| 292 | } elseif ( ! empty( $queried_object->taxonomy ) && is_taxonomy_hierarchical( $queried_object->taxonomy ) ) { |
| 293 | $term_hierarchy = _get_term_hierarchy( $queried_object->taxonomy ); |
| 294 | $term_to_ancestor = array(); |
| 295 | foreach ( (array) $term_hierarchy as $anc => $descs ) { |
| 296 | foreach ( (array) $descs as $desc ) |
| 297 | $term_to_ancestor[ $desc ] = $anc; |
| 298 | } |
| 299 | $desc = $queried_object->term_id; |
| 300 | do { |
| 301 | $possible_taxonomy_ancestors[ $queried_object->taxonomy ][] = $desc; |
| 302 | if ( isset( $term_to_ancestor[ $desc ] ) ) { |
| 303 | $_desc = $term_to_ancestor[ $desc ]; |
| 304 | unset( $term_to_ancestor[ $desc ] ); |
| 305 | $desc = $_desc; |
| 306 | } else { |
| 307 | $desc = 0; |
| 308 | } |
| 309 | } while ( ! empty( $desc ) ); |
| 310 | } |
| 311 | |
| 312 | $possible_object_parents = array_filter( $possible_object_parents ); |
| 313 | |
| 314 | foreach ( (array) $menu_items as $key => $menu_item ) { |
| 315 | $classes = (array) $menu_item->classes; |
| 316 | $classes[] = 'menu-item'; |
| 317 | $classes[] = 'menu-item-type-' . $menu_item->type; |
| 318 | |
| 319 | // if the menu item corresponds to a taxonomy term for the currently-queried non-hierarchical post object |
| 320 | if ( $wp_query->is_singular && 'taxonomy' == $menu_item->type && in_array( $menu_item->object_id, $possible_object_parents ) ) { |
| 321 | $active_parent_object_ids[] = (int) $menu_item->object_id; |
| 322 | $active_parent_item_ids[] = (int) $menu_item->db_id; |
| 323 | $active_object = $queried_object->post_type; |
| 324 | |
| 325 | // if the menu item corresponds to the currently-queried post or taxonomy object |
| 326 | } elseif ( |
| 327 | $menu_item->object_id == $queried_object_id && |
| 328 | ( |
| 329 | ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id ) || |
| 330 | ( 'post_type' == $menu_item->type && $wp_query->is_singular ) || |
| 331 | ( 'taxonomy' == $menu_item->type && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax ) ) |
| 332 | ) |
| 333 | ) { |
| 334 | $classes[] = 'current-menu-item'; |
| 335 | $_anc_id = (int) $menu_item->db_id; |
| 336 | |
| 337 | while( |
| 338 | ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) && |
| 339 | ! in_array( $_anc_id, $active_ancestor_item_ids ) |
| 340 | ) { |
| 341 | $active_ancestor_item_ids[] = $_anc_id; |
| 342 | } |
| 343 | |
| 344 | if ( 'post_type' == $menu_item->type && 'page' == $menu_item->object ) { |
| 345 | // Back compat classes for pages to match wp_page_menu() |
| 346 | $classes[] = 'page_item'; |
| 347 | $classes[] = 'page-item-' . $menu_item->object_id; |
| 348 | $classes[] = 'current_page_item'; |
| 349 | } |
| 350 | $active_parent_item_ids[] = (int) $menu_item->menu_item_parent; |
| 351 | $active_parent_object_ids[] = (int) $menu_item->post_parent; |
| 352 | $active_object = $menu_item->object; |
| 353 | |
| 354 | // if the menu item corresponds to the currently-requested URL |
| 355 | } elseif ( 'custom' == $menu_item->object ) { |
| 356 | $current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; |
| 357 | $item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url; |
| 358 | $_indexless_current = preg_replace( '/index.php$/', '', $current_url ); |
| 359 | |
| 360 | if ( in_array( $item_url, array( $current_url, $_indexless_current ) ) ) { |
| 361 | $classes[] = 'current-menu-item'; |
| 362 | $_anc_id = (int) $menu_item->db_id; |
| 363 | |
| 364 | while( |
| 365 | ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) && |
| 366 | ! in_array( $_anc_id, $active_ancestor_item_ids ) |
| 367 | ) { |
| 368 | $active_ancestor_item_ids[] = $_anc_id; |
| 369 | } |
| 370 | |
| 371 | if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ) ) ) { |
| 372 | // Back compat for home limk to match wp_page_menu() |
| 373 | $classes[] = 'current_page_item'; |
| 374 | } |
| 375 | $active_parent_item_ids[] = (int) $menu_item->menu_item_parent; |
| 376 | $active_parent_object_ids[] = (int) $menu_item->post_parent; |
| 377 | $active_object = $menu_item->object; |
| 378 | } |
| 379 | |
| 380 | if ( untrailingslashit($item_url) == home_url() ) |
| 381 | $classes[] = 'menu-item-home'; |
| 382 | } |
| 383 | |
| 384 | // back-compat with wp_page_menu: add "current_page_parent" to static home page link for any non-page query |
| 385 | if ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id ) |
| 386 | $classes[] = 'current_page_parent'; |
| 387 | |
| 388 | $menu_items[$key]->classes = array_unique( $classes ); |
| 389 | } |
| 390 | $active_ancestor_item_ids = array_filter( array_unique( $active_ancestor_item_ids ) ); |
| 391 | $active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) ); |
| 392 | $active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) ); |
| 393 | |
| 394 | // set parent's class |
| 395 | foreach ( (array) $menu_items as $key => $parent_item ) { |
| 396 | $classes = (array) $parent_item->classes; |
| 397 | |
| 398 | if ( |
| 399 | isset( $parent_item->type ) && |
| 400 | ( |
| 401 | // ancestral post object |
| 402 | ( |
| 403 | 'post_type' == $parent_item->type && |
| 404 | ! empty( $queried_object->post_type ) && |
| 405 | is_post_type_hierarchical( $queried_object->post_type ) && |
| 406 | in_array( $parent_item->object_id, $queried_object->ancestors ) |
| 407 | ) || |
| 408 | |
| 409 | // ancestral term |
| 410 | ( |
| 411 | 'taxonomy' == $parent_item->type && |
| 412 | isset( $possible_taxonomy_ancestors[ $parent_item->object ] ) && |
| 413 | in_array( $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ] ) |
| 414 | ) |
| 415 | ) |
| 416 | ) { |
| 417 | $classes[] = empty( $queried_object->taxonomy ) ? 'current-' . $queried_object->post_type . '-ancestor' : 'current-' . $queried_object->taxonomy . '-ancestor'; |
| 418 | } |
| 419 | |
| 420 | if ( in_array( intval( $parent_item->db_id ), $active_ancestor_item_ids ) ) { |
| 421 | $classes[] = 'current-menu-ancestor'; |
| 422 | } |
| 423 | if ( in_array( $parent_item->db_id, $active_parent_item_ids ) ) |
| 424 | $classes[] = 'current-menu-parent'; |
| 425 | if ( in_array( $parent_item->object_id, $active_parent_object_ids ) ) |
| 426 | $classes[] = 'current-' . $active_object . '-parent'; |
| 427 | |
| 428 | if ( 'post_type' == $parent_item->type && 'page' == $parent_item->object ) { |
| 429 | // Back compat classes for pages to match wp_page_menu() |
| 430 | if ( in_array('current-menu-parent', $classes) ) |
| 431 | $classes[] = 'current_page_parent'; |
| 432 | if ( in_array('current-menu-ancestor', $classes) ) |
| 433 | $classes[] = 'current_page_ancestor'; |
| 434 | } |
| 435 | |
| 436 | $menu_items[$key]->classes = array_unique( $classes ); |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * Retrieve the HTML list content for nav menu items. |
| 442 | * |
| 443 | * @uses Walker_Nav_Menu to create HTML list content. |
| 444 | * @since 3.0.0 |
| 445 | * @see Walker::walk() for parameters and return description. |
| 446 | */ |
| 447 | function walk_nav_menu_tree( $items, $depth, $r ) { |
| 448 | $walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker; |
| 449 | $args = array( $items, $depth, $r ); |
| 450 | |
| 451 | return call_user_func_array( array(&$walker, 'walk'), $args ); |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * Prevents a menu item ID from being used more than once. |
| 456 | * |
| 457 | * @since 3.0.1 |
| 458 | * @access private |
| 459 | */ |
| 460 | function _nav_menu_item_id_use_once( $id, $item ) { |
| 461 | static $_used_ids = array(); |
| 462 | if ( in_array( $item->ID, $_used_ids ) ) |
| 463 | return ''; |
| 464 | $_used_ids[] = $item->ID; |
| 465 | return $id; |
| 466 | } |
| 467 | add_filter( 'nav_menu_item_id', '_nav_menu_item_id_use_once', 10, 2 ); |
| 468 | |
| 469 | ?> |
| 470 | |