Magento: 获取类别所有子类别 (无限级别-目录树) Get All Sub Categories

生成分类目录树(Category Tree)

$rootcatId  = Mage::app()->getStore()->getRootCategoryId();
$categories = Mage::getModel('catalog/category')->getCategories($rootcatId);
 
function  get_categories($categories)
{
    $array = '<ul>';
     
    foreach ($categories as $category) {
        $cat    = Mage::getModel('catalog/category')->load($category->getId());
        $count  = $cat->getProductCount();
         
        $array .= '<li>'
                  . '<a href="' . Mage::getModel('catalog/category')->load($category->getId())->getUrl(). '">'
                  . $category->getName()
                  . "(".$count.")</a>";
                   
        if ($category->hasChildren()) {
            $children = Mage::getModel('catalog/category')
                              ->getCategories($category->getId());
            $array  .=  get_categories($children);
        }
        $array .= '</li>';
    }
     
    return  $array . '</ul>';
}
 
echo  get_categories($categories);

我个人的用法:

function  get_categories($categories,$level=0)
{
    $array = "\n".'<ul class="'.(!$level ? 'nav navbar-nav' :'dropdown-menu dropdown-menu-level-'.$level).'">';
     
    foreach ($categories as $category) 
    {
        // $cat    = Mage::getModel('catalog/category')->load($category->getId());
        // $count  = $cat->getProductCount();
         
        // $array .= "\n".'<li'.($category->hasChildren()?' class="dropdown-submenu"':'').'>'. '<a href="' . Mage::getUrl($category->getUrlPath()). '" class="dropdown-toggle" data-toggle="dropdown">'. $category->getName(). "(".$count.")</a>";
        
        $array .= "\n".'<li'.($category->hasChildren()?' class="dropdown-submenu dropdown-submenu-level-'.$level.'"':'').'>';
		$array .=  '	<a href="' . Mage::getModel('catalog/category')->load($category->getId())->getUrl(). '" class="dropdown-toggle" data-toggle="dropdown">';
		$array .=  $category->getName().($category->hasChildren()?'<span class="glyphicon glyphicon-play glyphicon-level-'.$category->getLevel().'" aria-hidden="true"></span>':'');
		$array .=  '	</a>';
                   
        if ($category->hasChildren()) {
            $children = Mage::getModel('catalog/category')->getCategories($category->getId()); 
            $array  .=  get_categories($children,$category->getLevel());
        }
        
        $array .= '</li>'."\n";
    }
     
    return  $array . '</ul>'."\n";
}

打印所有类别的方法如下:

//获取所有激活状态的分类模型集合
$categories = Mage::getModel( 'catalog/category' )->getCollection()
		->addAttributeToSelect( '*' )
     	// then the magic happens here:
	 	//->addAttributeToFilter('level', array('eq'=>2))
     	->addIsActiveFilter();
  
//循环Collection，并填充数组，可以根据需要的数据进行填充，本例以分类ID作为key，对应的值作为value
$allCategory = array ();
foreach ( $categories as $category ) {
	 $allCategory [ $category->getParentId()][$category->getId()] = $category ->getName().'('.$category->getLevel().')';
}
  
echo '==><pre>'; print_r($allCategory); echo '</pre>';

获取当前类别的子类别 get subcategories of current / parent category in magento

Method 1:
if you want to get subcategories of current category:

$_currentCategoryId = Mage::registry('current_category')->getId();
$childcategories= Mage::getModel('catalog/category')->getCollection()->addAttributeToSelect("*")->addFieldToFilter('parent_id', $_currentCategoryId)->addAttributeToSort('name', 'ASC');
foreach($childCategories as $childCategory)
   echo $childCategory->getName();
endforeach;

Method 2:
if you want to get subcategories of specific category:

$parentCategoryId = 3;
$children = Mage::getModel('catalog/category')->getCategories($parentCategoryId);
foreach ($children as $category) {
    echo $category->getName();
}