嗨，有愉快的程序员。我正在寻找一个帮助我使用wordpress作为CMS的网站。基本上我正在尝试添加一个名为“情绪板”的菜单项。到这个网站的front page，以便当用户将鼠标悬停在“热点”的时候。下拉菜单包含Mood Boards链接。由于我使用的是自定义主题，因此很多功能已从wordpress后端中删除，这意味着我必须破解代码才能将此项添加到导航中。我已经将自定义帖子类型添加到后端菜单中出现的wordpress。我的主要问题是我不确定哪个文件直接处理菜单项添加到前端，我相信它是nav-menu.php（见下文），它使用Walker遍历树并添加菜单项。但是我不知道这是如何工作的，或者即使我在正确的地方找工作！任何帮助都会非常感激，欢呼！
<?php
/**
* Navigation Menu functions
*
* @package WordPress
* @subpackage Nav_Menus
* @since 3.0.0
*/
/**
* Returns a navigation menu object.
*
* @since 3.0.0
*
* @uses get_term
* @uses get_term_by
*
* @param string $menu Menu id, slug or name
* @return mixed false if $menu param isn't supplied or term does not exist, menu object if successful.
*/
function wp_get_nav_menu_object( $menu ) {
if ( ! $menu )
return false;
$menu_obj = get_term( $menu, 'nav_menu' );
if ( ! $menu_obj )
$menu_obj = get_term_by( 'slug', $menu, 'nav_menu' );
if ( ! $menu_obj )
$menu_obj = get_term_by( 'name', $menu, 'nav_menu' );
if ( ! $menu_obj )
$menu_obj = false;
return $menu_obj;
}
/**
* Check if the given ID is a navigation menu.
*
* Returns true if it is; false otherwise.
*
* @since 3.0.0
*
* @param int|string $menu The menu to check (id, slug, or name)
* @return bool Whether the menu exists.
*/
function is_nav_menu( $menu ) {
if ( ! $menu )
return false;
$menu_obj = wp_get_nav_menu_object( $menu );
if (
$menu_obj &&
! is_wp_error( $menu_obj ) &&
! empty( $menu_obj->taxonomy ) &&
'nav_menu' == $menu_obj->taxonomy
)
return true;
return false;
}
/**
* Register navigation menus for a theme.
*
* @since 3.0.0
*
* @param array $locations Associative array of menu location identifiers (like a slug) and descriptive text.
*/
function register_nav_menus( $locations = array() ) {
global $_wp_registered_nav_menus;
add_theme_support( 'menus' );
$_wp_registered_nav_menus = array_merge( (array) $_wp_registered_nav_menus, $locations );
}
/**
* Unregisters a navigation menu for a theme.
*
* @param array $location the menu location identifier
*
* @return bool True on success, false on failure.
*/
function unregister_nav_menu( $location ) {
global $_wp_registered_nav_menus;
if ( is_array( $_wp_registered_nav_menus ) && isset( $_wp_registered_nav_menus[$location] ) ) {
unset( $_wp_registered_nav_menus[$location] );
if ( empty( $_wp_registered_nav_menus ) ) {
_remove_theme_support( 'menus' );
}
return true;
}
return false;
}
/**
* Register a navigation menu for a theme.
*
* @since 3.0.0
*
* @param string $location Menu location identifier, like a slug.
* @param string $description Menu location descriptive text.
*/
function register_nav_menu( $location, $description ) {
register_nav_menus( array( $location => $description ) );
}
/**
* Returns an array of all registered navigation menus in a theme
*
* @since 3.0.0
* @return array
*/
function get_registered_nav_menus() {
global $_wp_registered_nav_menus;
if ( isset( $_wp_registered_nav_menus ) )
return $_wp_registered_nav_menus;
return array();
}
/**
* Returns an array with the registered navigation menu locations and the menu assigned to it
*
* @since 3.0.0
* @return array
*/
function get_nav_menu_locations() {
$locations = get_theme_mod( 'nav_menu_locations' );
return ( is_array( $locations ) ) ? $locations : array();
}
/**
* Whether a registered nav menu location has a menu assigned to it.
*
* @since 3.0.0
* @param string $location Menu location identifier.
* @return bool Whether location has a menu.
*/
function has_nav_menu( $location ) {
$locations = get_nav_menu_locations();
return ( ! empty( $locations[ $location ] ) );
}
/**
* Determine whether the given ID is a nav menu item.
*
* @since 3.0.0
*
* @param int $menu_item_id The ID of the potential nav menu item.
* @return bool Whether the given ID is that of a nav menu item.
*/
function is_nav_menu_item( $menu_item_id = 0 ) {
return ( ! is_wp_error( $menu_item_id ) && ( 'nav_menu_item' == get_post_type( $menu_item_id ) ) );
}
/**
* Create a Navigation Menu.
*
* @since 3.0.0
*
* @param string $menu_name Menu Name
* @return mixed Menu object on success|WP_Error on failure
*/
function wp_create_nav_menu( $menu_name ) {
return wp_update_nav_menu_object( 0, array( 'menu-name' => $menu_name ) );
}
/**
* Delete a Navigation Menu.
*
* @since 3.0.0
*
* @param string $menu name|id|slug
* @return mixed Menu object on success|WP_Error on failure
*/
function wp_delete_nav_menu( $menu ) {
$menu = wp_get_nav_menu_object( $menu );
if ( ! $menu )
return false;
$menu_objects = get_objects_in_term( $menu->term_id, 'nav_menu' );
if ( ! empty( $menu_objects ) ) {
foreach ( $menu_objects as $item ) {
wp_delete_post( $item );
}
}
$result = wp_delete_term( $menu->term_id, 'nav_menu' );
// Remove this menu from any locations.
$locations = get_nav_menu_locations();
foreach ( $locations as $location => $menu_id ) {
if ( $menu_id == $menu->term_id )
$locations[ $location ] = 0;
}
set_theme_mod( 'nav_menu_locations', $locations );
if ( $result && !is_wp_error($result) )
/**
* Fires after a navigation menu has been successfully deleted.
*
* @since 3.0.0
*
* @param int $term_id ID of the deleted menu.
*/
do_action( 'wp_delete_nav_menu', $menu->term_id );
return $result;
}
/**
* Save the properties of a menu or create a new menu with those properties.
*
* @since 3.0.0
*
* @param int $menu_id The ID of the menu or "0" to create a new menu.
* @param array $menu_data The array of menu data.
* @return int|WP_Error object The menu's ID or WP_Error object.
*/
function wp_update_nav_menu_object( $menu_id = 0, $menu_data = array() ) {
$menu_id = (int) $menu_id;
$_menu = wp_get_nav_menu_object( $menu_id );
$args = array(
'description' => ( isset( $menu_data['description'] ) ? $menu_data['description'] : '' ),
'name' => ( isset( $menu_data['menu-name'] ) ? $menu_data['menu-name'] : '' ),
'parent' => ( isset( $menu_data['parent'] ) ? (int) $menu_data['parent'] : 0 ),
'slug' => null,
);
// double-check that we're not going to have one menu take the name of another
$_possible_existing = get_term_by( 'name', $menu_data['menu-name'], 'nav_menu' );
if (
$_possible_existing &&
! is_wp_error( $_possible_existing ) &&
isset( $_possible_existing->term_id ) &&
$_possible_existing->term_id != $menu_id
)
return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_data['menu-name'] ) ) );
// menu doesn't already exist, so create a new menu
if ( ! $_menu || is_wp_error( $_menu ) ) {
$menu_exists = get_term_by( 'name', $menu_data['menu-name'], 'nav_menu' );
if ( $menu_exists )
return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_data['menu-name'] ) ) );
$_menu = wp_insert_term( $menu_data['menu-name'], 'nav_menu', $args );
if ( is_wp_error( $_menu ) )
return $_menu;
/**
* Fires after a navigation menu is successfully created.
*
* @since 3.0.0
*
* @param int $term_id ID of the new menu.
* @param array $menu_data An array of menu data.
*/
do_action( 'wp_create_nav_menu', $_menu['term_id'], $menu_data );
return (int) $_menu['term_id'];
}
if ( ! $_menu || ! isset( $_menu->term_id ) )
return 0;
$menu_id = (int) $_menu->term_id;
$update_response = wp_update_term( $menu_id, 'nav_menu', $args );
if ( is_wp_error( $update_response ) )
return $update_response;
/**
* Fires after a navigation menu has been successfully updated.
*
* @since 3.0.0
*
* @param int $menu_id ID of the updated menu.
* @param array $menu_data An array of menu data.
*/
do_action( 'wp_update_nav_menu', $menu_id, $menu_data );
return $menu_id;
}
/**
* Save the properties of a menu item or create a new one.
*
* @since 3.0.0
*
* @param int $menu_id The ID of the menu. Required. If "0", makes the menu item a draft orphan.
* @param int $menu_item_db_id The ID of the menu item. If "0", creates a new menu item.
* @param array $menu_item_data The menu item's data.
* @return int|WP_Error The menu item's database ID or WP_Error object on failure.
*/
function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item_data = array() ) {
$menu_id = (int) $menu_id;
$menu_item_db_id = (int) $menu_item_db_id;
// make sure that we don't convert non-nav_menu_item objects into nav_menu_item objects
if ( ! empty( $menu_item_db_id ) && ! is_nav_menu_item( $menu_item_db_id ) )
return new WP_Error( 'update_nav_menu_item_failed', __( 'The given object ID is not that of a menu item.' ) );
$menu = wp_get_nav_menu_object( $menu_id );
if ( ! $menu && 0 !== $menu_id ) {
return new WP_Error( 'invalid_menu_id', __( 'Invalid menu ID.' ) );
}
if ( is_wp_error( $menu ) ) {
return $menu;
}
$defaults = array(
'menu-item-db-id' => $menu_item_db_id,
'menu-item-object-id' => 0,
'menu-item-object' => '',
'menu-item-parent-id' => 0,
'menu-item-position' => 0,
'menu-item-type' => 'custom',
'menu-item-title' => '',
'menu-item-url' => '',
'menu-item-description' => '',
'menu-item-attr-title' => '',
'menu-item-target' => '',
'menu-item-classes' => '',
'menu-item-xfn' => '',
'menu-item-status' => '',
);
$args = wp_parse_args( $menu_item_data, $defaults );
if ( 0 == $menu_id ) {
$args['menu-item-position'] = 1;
} elseif ( 0 == (int) $args['menu-item-position'] ) {
$menu_items = 0 == $menu_id ? array() : (array) wp_get_nav_menu_items( $menu_id, array( 'post_status' => 'publish,draft' ) );
$last_item = array_pop( $menu_items );
$args['menu-item-position'] = ( $last_item && isset( $last_item->menu_order ) ) ? 1 + $last_item->menu_order : count( $menu_items );
}
$original_parent = 0 < $menu_item_db_id ? get_post_field( 'post_parent', $menu_item_db_id ) : 0;
if ( 'custom' != $args['menu-item-type'] ) {
/* if non-custom menu item, then:
* use original object's URL
* blank default title to sync with original object's
*/
$args['menu-item-url'] = '';
$original_title = '';
if ( 'taxonomy' == $args['menu-item-type'] ) {
$original_parent = get_term_field( 'parent', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
$original_title = get_term_field( 'name', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
} elseif ( 'post_type' == $args['menu-item-type'] ) {
$original_object = get_post( $args['menu-item-object-id'] );
$original_parent = (int) $original_object->post_parent;
$original_title = $original_object->post_title;
}
if ( $args['menu-item-title'] == $original_title )
$args['menu-item-title'] = '';
// hack to get wp to create a post object when too many properties are empty
if ( '' == $args['menu-item-title'] && '' == $args['menu-item-description'] )
$args['menu-item-description'] = ' ';
}
// Populate the menu item object
$post = array(
'menu_order' => $args['menu-item-position'],
'ping_status' => 0,
'post_content' => $args['menu-item-description'],
'post_excerpt' => $args['menu-item-attr-title'],
'post_parent' => $original_parent,
'post_title' => $args['menu-item-title'],
'post_type' => 'nav_menu_item',
);
$update = 0 != $menu_item_db_id;
// New menu item. Default is draft status
if ( ! $update ) {
$post['ID'] = 0;
$post['post_status'] = 'publish' == $args['menu-item-status'] ? 'publish' : 'draft';
$menu_item_db_id = wp_insert_post( $post );
if ( ! $menu_item_db_id || is_wp_error( $menu_item_db_id ) )
return $menu_item_db_id;
}
// Associate the menu item with the menu term
// Only set the menu term if it isn't set to avoid unnecessary wp_get_object_terms()
if ( $menu_id && ( ! $update || ! is_object_in_term( $menu_item_db_id, 'nav_menu', (int) $menu->term_id ) ) ) {
wp_set_object_terms( $menu_item_db_id, array( $menu->term_id ), 'nav_menu' );
}
if ( 'custom' == $args['menu-item-type'] ) {
$args['menu-item-object-id'] = $menu_item_db_id;
$args['menu-item-object'] = 'custom';
}
$menu_item_db_id = (int) $menu_item_db_id;
update_post_meta( $menu_item_db_id, '_menu_item_type', sanitize_key($args['menu-item-type']) );
update_post_meta( $menu_item_db_id, '_menu_item_menu_item_parent', strval( (int) $args['menu-item-parent-id'] ) );
update_post_meta( $menu_item_db_id, '_menu_item_object_id', strval( (int) $args['menu-item-object-id'] ) );
update_post_meta( $menu_item_db_id, '_menu_item_object', sanitize_key($args['menu-item-object']) );
update_post_meta( $menu_item_db_id, '_menu_item_target', sanitize_key($args['menu-item-target']) );
$args['menu-item-classes'] = array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-classes'] ) );
$args['menu-item-xfn'] = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-xfn'] ) ) );
update_post_meta( $menu_item_db_id, '_menu_item_classes', $args['menu-item-classes'] );
update_post_meta( $menu_item_db_id, '_menu_item_xfn', $args['menu-item-xfn'] );
update_post_meta( $menu_item_db_id, '_menu_item_url', esc_url_raw($args['menu-item-url']) );
if ( 0 == $menu_id )
update_post_meta( $menu_item_db_id, '_menu_item_orphaned', (string) time() );
elseif ( get_post_meta( $menu_item_db_id, '_menu_item_orphaned' ) )
delete_post_meta( $menu_item_db_id, '_menu_item_orphaned' );
// Update existing menu item. Default is publish status
if ( $update ) {
$post['ID'] = $menu_item_db_id;
$post['post_status'] = 'draft' == $args['menu-item-status'] ? 'draft' : 'publish';
wp_update_post( $post );
}
/**
* Fires after a navigation menu item has been updated.
*
* @since 3.0.0
*
* @see wp_update_nav_menu_items()
*
* @param int $menu_id ID of the updated menu.
* @param int $menu_item_db_id ID of the updated menu item.
* @param array $args An array of arguments used to update a menu item.
*/
do_action( 'wp_update_nav_menu_item', $menu_id, $menu_item_db_id, $args );
return $menu_item_db_id;
}
/**
* Returns all navigation menu objects.
*
* @since 3.0.0
*
* @param array $args Array of arguments passed on to get_terms().
* @return array menu objects
*/
function wp_get_nav_menus( $args = array() ) {
$defaults = array( 'hide_empty' => false, 'orderby' => 'none' );
$args = wp_parse_args( $args, $defaults );
/**
* Filter the navigation menu objects being returned.
*
* @since 3.0.0
*
* @see get_terms()
*
* @param array $menus An array of menu objects.
* @param array $args An array of arguments used to retrieve menu objects.
*/
return apply_filters( 'wp_get_nav_menus', get_terms( 'nav_menu', $args), $args );
}
/**
* Sort menu items by the desired key.
*
* @since 3.0.0
* @access private
*
* @param object $a The first object to compare
* @param object $b The second object to compare
* @return int -1, 0, or 1 if $a is considered to be respectively less than, equal to, or greater than $b.
*/
function _sort_nav_menu_items( $a, $b ) {
global $_menu_item_sort_prop;
if ( empty( $_menu_item_sort_prop ) )
return 0;
if ( ! isset( $a->$_menu_item_sort_prop ) || ! isset( $b->$_menu_item_sort_prop ) )
return 0;
$_a = (int) $a->$_menu_item_sort_prop;
$_b = (int) $b->$_menu_item_sort_prop;
if ( $a->$_menu_item_sort_prop == $b->$_menu_item_sort_prop )
return 0;
elseif ( $_a == $a->$_menu_item_sort_prop && $_b == $b->$_menu_item_sort_prop )
return $_a < $_b ? -1 : 1;
else
return strcmp( $a->$_menu_item_sort_prop, $b->$_menu_item_sort_prop );
}
/**
* Returns if a menu item is valid. Bug #13958
*
* @since 3.2.0
* @access private
*
* @param object $menu_item The menu item to check
* @return bool false if invalid, else true.
*/
function _is_valid_nav_menu_item( $item ) {
if ( ! empty( $item->_invalid ) )
return false;
return true;
}
/**
* Returns all menu items of a navigation menu.
*
* @since 3.0.0
*
* @param string $menu menu name, id, or slug
* @param string $args
* @return mixed $items array of menu items, else false.
*/
function wp_get_nav_menu_items( $menu, $args = array() ) {
$menu = wp_get_nav_menu_object( $menu );
if ( ! $menu )
return false;
static $fetched = array();
$items = get_objects_in_term( $menu->term_id, 'nav_menu' );
if ( empty( $items ) )
return $items;
$defaults = array( 'order' => 'ASC', 'orderby' => 'menu_order', 'post_type' => 'nav_menu_item',
'post_status' => 'publish', 'output' => ARRAY_A, 'output_key' => 'menu_order', 'nopaging' => true );
$args = wp_parse_args( $args, $defaults );
if ( count( $items ) > 1 )
$args['include'] = implode( ',', $items );
else
$args['include'] = $items[0];
$items = get_posts( $args );
if ( is_wp_error( $items ) || ! is_array( $items ) )
return false;
// Get all posts and terms at once to prime the caches
if ( empty( $fetched[$menu->term_id] ) || wp_using_ext_object_cache() ) {
$fetched[$menu->term_id] = true;
$posts = array();
$terms = array();
foreach ( $items as $item ) {
$object_id = get_post_meta( $item->ID, '_menu_item_object_id', true );
$object = get_post_meta( $item->ID, '_menu_item_object', true );
$type = get_post_meta( $item->ID, '_menu_item_type', true );
if ( 'post_type' == $type )
$posts[$object][] = $object_id;
elseif ( 'taxonomy' == $type)
$terms[$object][] = $object_id;
}
if ( ! empty( $posts ) ) {
foreach ( array_keys($posts) as $post_type ) {
get_posts( array('post__in' => $posts[$post_type], 'post_type' => $post_type, 'nopaging' => true, 'update_post_term_cache' => false) );
}
}
unset($posts);
if ( ! empty( $terms ) ) {
foreach ( array_keys($terms) as $taxonomy ) {
get_terms($taxonomy, array('include' => $terms[$taxonomy]) );
}
}
unset($terms);
}
$items = array_map( 'wp_setup_nav_menu_item', $items );
if ( ! is_admin() ) // Remove invalid items only in frontend
$items = array_filter( $items, '_is_valid_nav_menu_item' );
if ( ARRAY_A == $args['output'] ) {
$GLOBALS['_menu_item_sort_prop'] = $args['output_key'];
usort($items, '_sort_nav_menu_items');
$i = 1;
foreach( $items as $k => $item ) {
$items[$k]->$args['output_key'] = $i++;
}
}
/**
* Filter the navigation menu items being returned.
*
* @since 3.0.0
*
* @param array $items An array of menu item post objects.
* @param object $menu The menu object.
* @param array $args An array of arguments used to retrieve menu item objects.
*/
return apply_filters( 'wp_get_nav_menu_items', $items, $menu, $args );
}
/**
* Decorates a menu item object with the shared navigation menu item properties.
*
* Properties:
* - db_id: The DB ID of this item as a nav_menu_item object, if it exists (0 if it doesn't exist).
* - object_id: The DB ID of the original object this menu item represents, e.g. ID for posts and term_id for categories.
* - type: The family of objects originally represented, such as "post_type" or "taxonomy."
* - object: The type of object originally represented, such as "category," "post", or "attachment."
* - type_label: The singular label used to describe this type of menu item.
* - post_parent: The DB ID of the original object's parent object, if any (0 otherwise).
* - menu_item_parent: The DB ID of the nav_menu_item that is this item's menu parent, if any. 0 otherwise.
* - url: The URL to which this menu item points.
* - title: The title of this menu item.
* - target: The target attribute of the link element for this menu item.
* - attr_title: The title attribute of the link element for this menu item.
* - classes: The array of class attribute values for the link element of this menu item.
* - xfn: The XFN relationship expressed in the link of this menu item.
* - description: The description of this menu item.
*
* @since 3.0.0
*
* @param object $menu_item The menu item to modify.
* @return object $menu_item The menu item with standard menu item properties.
*/
function wp_setup_nav_menu_item( $menu_item ) {
if ( isset( $menu_item->post_type ) ) {
if ( 'nav_menu_item' == $menu_item->post_type ) {
$menu_item->db_id = (int) $menu_item->ID;
$menu_item->menu_item_parent = empty( $menu_item->menu_item_parent ) ? get_post_meta( $menu_item->ID, '_menu_item_menu_item_parent', true ) : $menu_item->menu_item_parent;
$menu_item->object_id = empty( $menu_item->object_id ) ? get_post_meta( $menu_item->ID, '_menu_item_object_id', true ) : $menu_item->object_id;
$menu_item->object = empty( $menu_item->object ) ? get_post_meta( $menu_item->ID, '_menu_item_object', true ) : $menu_item->object;
$menu_item->type = empty( $menu_item->type ) ? get_post_meta( $menu_item->ID, '_menu_item_type', true ) : $menu_item->type;
if ( 'post_type' == $menu_item->type ) {
$object = get_post_type_object( $menu_item->object );
if ( $object ) {
$menu_item->type_label = $object->labels->singular_name;
} else {
$menu_item->type_label = $menu_item->object;
$menu_item->_invalid = true;
}
$menu_item->url = get_permalink( $menu_item->object_id );
$original_object = get_post( $menu_item->object_id );
$original_title = $original_object->post_title;
$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;
} elseif ( 'taxonomy' == $menu_item->type ) {
$object = get_taxonomy( $menu_item->object );
if ( $object ) {
$menu_item->type_label = $object->labels->singular_name;
} else {
$menu_item->type_label = $menu_item->object;
$menu_item->_invalid = true;
}
$term_url = get_term_link( (int) $menu_item->object_id, $menu_item->object );
$menu_item->url = !is_wp_error( $term_url ) ? $term_url : '';
$original_title = get_term_field( 'name', $menu_item->object_id, $menu_item->object, 'raw' );
if ( is_wp_error( $original_title ) )
$original_title = false;
$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;
} else {
$menu_item->type_label = __('Custom');
$menu_item->title = $menu_item->post_title;
$menu_item->url = empty( $menu_item->url ) ? get_post_meta( $menu_item->ID, '_menu_item_url', true ) : $menu_item->url;
}
$menu_item->target = empty( $menu_item->target ) ? get_post_meta( $menu_item->ID, '_menu_item_target', true ) : $menu_item->target;
/**
* Filter a navigation menu item's title attribute.
*
* @since 3.0.0
*
* @param string $item_title The menu item title attribute.
*/
$menu_item->attr_title = empty( $menu_item->attr_title ) ? apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ) : $menu_item->attr_title;
if ( empty( $menu_item->description ) ) {
/**
* Filter a navigation menu item's description.
*
* @since 3.0.0
*
* @param string $description The menu item description.
*/
$menu_item->description = apply_filters( 'nav_menu_description', wp_trim_words( $menu_item->post_content, 200 ) );
}
$menu_item->classes = empty( $menu_item->classes ) ? (array) get_post_meta( $menu_item->ID, '_menu_item_classes', true ) : $menu_item->classes;
$menu_item->xfn = empty( $menu_item->xfn ) ? get_post_meta( $menu_item->ID, '_menu_item_xfn', true ) : $menu_item->xfn;
} else {
$menu_item->db_id = 0;
$menu_item->menu_item_parent = 0;
$menu_item->object_id = (int) $menu_item->ID;
$menu_item->type = 'post_type';
$object = get_post_type_object( $menu_item->post_type );
$menu_item->object = $object->name;
$menu_item->type_label = $object->labels->singular_name;
if ( '' === $menu_item->post_title )
$menu_item->post_title = sprintf( __( '#%d (no title)' ), $menu_item->ID );
$menu_item->title = $menu_item->post_title;
$menu_item->url = get_permalink( $menu_item->ID );
$menu_item->target = '';
/** This filter is documented in wp-includes/nav-menu.php */
$menu_item->attr_title = apply_filters( 'nav_menu_attr_title', '' );
/** This filter is documented in wp-includes/nav-menu.php */
$menu_item->description = apply_filters( 'nav_menu_description', '' );
$menu_item->classes = array();
$menu_item->xfn = '';
}
} elseif ( isset( $menu_item->taxonomy ) ) {
$menu_item->ID = $menu_item->term_id;
$menu_item->db_id = 0;
$menu_item->menu_item_parent = 0;
$menu_item->object_id = (int) $menu_item->term_id;
$menu_item->post_parent = (int) $menu_item->parent;
$menu_item->type = 'taxonomy';
$object = get_taxonomy( $menu_item->taxonomy );
$menu_item->object = $object->name;
$menu_item->type_label = $object->labels->singular_name;
$menu_item->title = $menu_item->name;
$menu_item->url = get_term_link( $menu_item, $menu_item->taxonomy );
$menu_item->target = '';
$menu_item->attr_title = '';
$menu_item->description = get_term_field( 'description', $menu_item->term_id, $menu_item->taxonomy );
$menu_item->classes = array();
$menu_item->xfn = '';
}
/**
* Filter a navigation menu item object.
*
* @since 3.0.0
*
* @param object $menu_item The menu item object.
*/
return apply_filters( 'wp_setup_nav_menu_item', $menu_item );
}
答案 0 :(得分：0)
在主题＆＃39; function.php文件中写下以下代码： -
add_filter( 'wp_nav_menu_items', 'your_custom_menu_item', 10, 2 );
function your_custom_menu_item ( $items, $args ) {
if ($args->theme_location == 'primary') {
$items .= '<li>Show whatever</li>';
}
return $items;
}