使用递归函数从 Magento 打印类别的嵌套列表

Question

因此，我在 /[my-theme-name]/template/catalog/navigation/left.phtml 中有以下代码作为概念证明：

<?php
$Mage_Catalog_Block_Navigation = new Mage_Catalog_Block_Navigation();
$categories = $Mage_Catalog_Block_Navigation->getStoreCategories();

function render_flat_nav($categories) {
    $html = '<ul>';
    foreach($categories as $category) {
        $html .= '<li><a href="' . $category->getCategoryUrl($cat) . '">' . 
                  $category->getName() . "</a>\n";
        if($category->hasChildren()) {
            $children = $category->getChildren();
            $html .= render_flat_nav($children);
        }
        $html .= '</li>';
    }
    return $html . '</ul>';
}
echo render_flat_nav($categories); ?>

它非常适合 0 级和 1 级类别，但任何嵌套更深的类别都适用从未打印出来。

因此 $category->getChildren() 无法完全返回我期望的结果。是否有一个我可以调用的方法可以与我的递归函数一起使用？

Answer 1

我已经找到了问题的答案，但可能不是最佳答案：

<?php
$Mage_Catalog_Block_Navigation = new Mage_Catalog_Block_Navigation();
$categories = $Mage_Catalog_Block_Navigation->getStoreCategories();

function render_flat_nav($categories) {
    $html = '<ul>';
    foreach($categories as $category) {
        $html .= '<li><a href="' . $category->getCategoryUrl($cat) . '">' . 
                  $category->getName() . "</a>\n";
        if($category->hasChildren()) {
            $children = Mage::getModel('catalog/category')->getCategories($category->entity_id);
            $html .= render_flat_nav($children);
            }
        $html .= '</li>';
    }
    return $html . '</ul>';
}
echo render_flat_nav($categories); ?>

Answer 2

$_category = Mage::getModel('catalog/category')->load(257);    
         $_categories = $_category
                    ->getCollection()
                    ->addAttributeToSelect(array('name', 'image', 'description'))
                    ->addIdFilter($_category->getChildren());

function render_flat_nav($categories) {
    $html = '<ul>';
    foreach($categories as $category) {
        $html .= '<li><a href="' . $category->getCategoryUrl($cat) . '">' . 
                  $category->getName() . "</a>\n";
        if($category->hasChildren()) {
            $children = Mage::getModel('catalog/category')->getCategories($category->entity_id);
            $html .= render_flat_nav($children);
            }
        $html .= '</li>';
    }
    return $html . '</ul>';
}
echo render_flat_nav($_categories);

感谢以上内容，我设法让它适用于特定类别 id，并且也适用于平面类别。