Typecho文章页内获取当前父分类的所有子分类

文章页获取当前父分类下的所有子分类。

<ul>
<?php $this->widget('Widget_Metas_Category_List')->to($categorys); ?>
<?php while ($categorys->next()): ?>
<?php
if  ($this->category == $categorys->slug&&($this->is("post")||$this->is("category"))){
$childrens = $this->widget('Widget_Metas_Category_List')->getAllChildren($categorys->parent);
for ($i=0; $i <count($childrens) ; $i++) { 
    $thisChild = $this->widget('Widget_Metas_Category_List')->getCategory($childrens[$i]);
    ?>
    <li><a href="<?php echo $thisChild["permalink"] ?>"><?php echo $thisChild["name"] ?></a></li>
    <?php
    }
}
?>
<?php endwhile;?>
</ul>

输出如下：

<ul>
    <li>
        <a href="https://www.qiansw.com/category/child1/">子分类1</a>
    </li>
    <li>
        <a href="https://www.qiansw.com/category/child2/">子分类2</a>
    </li>
    <li>
        <a href="https://www.qiansw.com/category/child3/">子分类3</a>
    </li>
</ul>