How To Get Parent Category ID In Magento 2

Magento 2 is a flexible CMS that allows store owners to offer feature-rich shopping platforms and expand their E-commerce stores!

One such customization that the CMS allows is implementing category-specific features, and for that, you need the programmatic methods to get parent category ID in Magento 2.

For example, you need to display the name or image of a parent category from its subcategory. Or, impose shopping restrictions based on a particular category.

You can use the below code for such category-related customizations in Magento 2, depending on the business or client requirements.

Methods to Get Parent Category ID in Magento 2:

1. Using Block File
   
   <?php namespace Vendor\Extension\Block; use Magento\Framework\View\Element\Template; use Magento\Backend\Block\Template\Context; use Magento\Catalog\Model\CategoryFactory; use Magento\Framework\Registry; class CategoryBrand extends Template{ protected $categoryFactory; protected $registry; protected $category; public function __construct( Context $context, CategoryFactory $categoryFactory, Registry $registry, array $data = [] ) { $this->categoryFactory = $categoryFactory; $this->registry = $registry; parent::__construct($context, $data); } public function getCurrentProduct() { return $this->registry->registry('current_product'); } public function getCategory($categoryId) { $this->category = $this->categoryFactory->create(); $this->category->load($categoryId); return $this->category; } } ?>

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   <?php   namespace Vendor\Extension\Block;   use Magento\Framework\View\Element\Template; use Magento\Backend\Block\Template\Context; use Magento\Catalog\Model\CategoryFactory; use Magento\Framework\Registry;   class CategoryBrand extends Template{       protected $categoryFactory;     protected $registry;     protected $category;       public function __construct(         Context $context,         CategoryFactory $categoryFactory,         Registry $registry,         array $data = []     )     {         $this->categoryFactory = $categoryFactory;         $this->registry = $registry;         parent::__construct($context, $data);     }       public function getCurrentProduct()     {         return $this->registry->registry('current_product');     }       public function getCategory($categoryId)     {         $this->category = $this->categoryFactory->create();         $this->category->load($categoryId);         return $this->category;     } }   ?>

2. Using PHTML File
   
   <?php $product = $this->getCurrentProduct(); $categoryIds = $product->getCategoryIds(); //Get Current CategoryIds foreach ($categoryIds as $categoryId){ $category = $this->getCategory($categoryId); // Load Category $parentCategories = $category->getparent_id(); // Get Parent Category Id echo $parentCategories. '<br />'; } ?>

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   <?php   $product = $this->getCurrentProduct();   $categoryIds = $product->getCategoryIds(); //Get Current CategoryIds   foreach ($categoryIds as $categoryId){     $category = $this->getCategory($categoryId);   // Load Category     $parentCategories = $category->getparent_id();   // Get Parent Category Id       echo $parentCategories. '<br />'; }   ?>

That’s it.

Use any of the above methods to get parent category ID in Magento 2.

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