1。收集有关移动的信息首先，我们需要在移动之前和之后获取页面的副本。我用了两个钩子：pre_post_update 和save_post_page. 如果父级已更改（因为这些挂钩将在每次页面更新时运行），它将调用一个名为menu_match 我将在后续步骤中记录。

// Re-initialise post vars to prevent accidental moves
$old_post = NULL;
$new_post = NULL;

// Capture the post details before they change
add_action(\'pre_post_update\', \'get_old_post_version\');
function get_old_post_version($postID){
    global $old_post;
    $old_post = get_post($postID);
}

// Get the updated post details
add_action(\'save_post_page\', \'get_new_post_version\');
function get_new_post_version($postID){
    global $old_post, $new_post;
    $new_post = get_post($postID);

    // If the parent has changed, make the menu match the new heirarchy
    if($old_post->post_parent != $new_post->post_parent){
        menu_match($old_post, $new_post);
    }
}

nbsp；

2。找到合适的菜单项，此步骤和步骤3的代码都将在步骤3的下面，因为它们是相同功能的一部分，我认为将它们放在一起阅读会更好。

此步骤包括获取给定菜单的项目（该菜单的ID将为要附加到页面继承权限的菜单指定），然后将它们推到一个数组（用于子菜单），如果object_id （它们所代表的项的ID）匹配旧页的ID，或者匹配另一个数组（对于父项），如果object_id 匹配旧页的post_parent （作为旧页父级的页的ID）。

注：我说的是“旧页面”，意思是页面的旧版本。此处没有“删除并重新创建”。

如果发现多个子项和/或父项，我们将通过检查子项是否menu_item_parent （其父菜单项的ID）与父菜单项的ID匹配。。。很简单，对吧？

最后，我们找到新的父项（其object_id 匹配new 第页的post_parent).

 ；

3。将子级移动到适当的新父级，这一步只需调用wp_update_nav_menu_item 为了用新的父ID更新子项，我还恢复了一些其他属性以保持健全。

 ；

这个menu_match 功能如下-这是我第一次提交“回答你自己的问题”，所以如果我用了完全错误的方法，请告诉我！还有一些“待办事项”评论，建议对功能进行改进。。。我相信会有一个更干净的方法来做这件事，但这是我用过的方法！

function menu_match(&$old_post, &$new_post){
    // Set menu which we\'re manipulating...
    $menuID = 2;
    // ... and get its items
    $menu_items = wp_get_nav_menu_items($menuID);

    // Find all items which link to the page in question
    $old_child_items = array();
    foreach($menu_items as $m_item){
        if($m_item->object_id == $old_post->ID){
            array_push($old_child_items, $m_item);  
        }
    }

    // If the post isn\'t top level, find all items which link to the parent in question
    $old_parent_items = array();
    if($old_post->post_parent != 0){
        foreach($menu_items as $m_item){
            if($m_item->object_id == $old_post->post_parent){
                array_push($old_parent_items, $m_item);
            }
        }
    }

    // Pick the correct child (and parent if necessary)
    $child = NULL;
    $old_parent = NULL;
    foreach($old_child_items as $child_candidate){
        if(count($old_parent_items) > 0){
            // If there are parent items to look through, find the one which has the right ID
            foreach($old_parent_items as $parent_candidate){
                if($child_candidate->menu_item_parent == $parent_candidate->ID){
                    $child = $child_candidate;
                    $old_parent = $parent_candidate;
                }
            }
        }else{
            // If there are no parent items, pick the child item which has no parent
            if($child_candidate->menu_item_parent == 0){
                $child = $child_candidate;
            }
        }
    }

    if($child != NULL){
        // If the post isn\'t moving to top level, find all items which link to the new parent
        if($new_post->post_parent != 0){
            $new_parent_items = array();
            foreach($menu_items as $m_item){
                if($m_item->object_id == $new_post->post_parent){
                    array_push($new_parent_items, $m_item);
                }
            }

            // TODO:    Add recursive upwards search in the event that there are two menu items
            //          for the desired parent.
            //
            // For now, assume the first match is correct, as there shouldn\'t be more than one
            // item pointing to the same parent.
            if(count($new_parent_items) > 0){
                $new_parentID = $new_parent_items[0]->ID;
            }else{
                // If no matches are found, put the item on the top level
                $new_parentID = 0;  
            }
        }else{
            // Post is moving to top level
            $new_parent_items = NULL;
            $new_parentID = 0;  
        }

        // Update the menu item with the new parent (and reinstate existing properties for sanity)
        $menu_update = wp_update_nav_menu_item($menuID, $child->db_id, array(
            \'menu-item-status\' => $child->post_status,
            \'menu-item-post-name\' => $child->post_name,
            \'menu-item-type\' => $child->post_type,
            \'menu-item-parent-id\' => $new_parentID,
            \'menu-item-object-id\' => $child->object_id,
            \'menu-item-object\' => $child->object,
            \'menu-item-type\' => $child->type,
            \'menu-item-type-label\' => $child->type_label,
            \'menu-item-url\' => $child->url
        ));
    }

    // TODO:    Handle overrides (in case a page doesn\'t want putting in the menu or
    //          moving from its current location)

    return;
}