将页面层次结构保留在wp_list_pages中，即使在子代或孙子上也是如此 [英] Keep page hierarchy in wp_list_pages, even if on a child or grandchild

问题描述

我具有以下页面结构，并且需要在具有子页面的那些页面上显示相同的结构:

I have the following structure of pages, and I need to have that same structure displayed on those pages who have child pages:

- Childpage
- - Grandchildpage
- - Other Grandchildpage
- Other Childpage

以下代码用于显示page.php上的结构:

The following code is used to display the structure on page.php:

<ul class="sidemenu-list">
    <?php
    if($post->post_parent)
        $children = wp_list_pages("title_li=&child_of=".$post->post_parent."&echo=1");
    else
        $children = wp_list_pages("title_li=&child_of=".$post->ID."&echo=1");
        if ($children) { ?>
        <ul>
            <?php echo $children; ?>
        </ul>
    <?php } ?>
</ul>

在父页面上有效.但是当我在子页面或孙页面之一上时，此操作不再起作用.

This works when on the parent page. But when I'm on one of the childpages or grandchild pages, this doesn't work anymore.

按照上面的结构示例，当我进入子页面"时，只会得到以下内容:

Following above structure example, when I'm on 'Childpage' I only get the following:

- Childpage
- Other Childpage

当我进入孙子页面"时，我只会得到:

And when I'm on 'Grandchildpage' I only get:

- - Grandchildpage
- - Other Grandchildpage

即使页面是子代还是孙子，显示页面层次结构的正确方法是什么?

What is the correct way to display the page hierarchy even when the page is a child or grandchild?

推荐答案

使用以下代码:

<?php
if(!$post->post_parent){
    // get the child of the top-level page
    $children = wp_list_pages("title_li=&child_of=".$post->ID."&echo=0");
}else{
    // get the child pages if we are on the first page of the child level.
    //$children = wp_list_pages("title_li=&child_of=".$post->post_parent."&echo=0");

    if($post->ancestors)
    {
        // now get an ID of the first page
        // wordpress collects ID in reverse order, so the "first" will be the last page
        $ancestors = end($post->ancestors);
        $children = wp_list_pages("title_li=&child_of=".$ancestors."&echo=0");
    }
}

if ($children) { ?>
    <ul>
        <?php echo $children; ?>
    </ul>
<?php } ?>

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