Magento 2: How to Get Category Collection in Magento 2?

Sample File Path: app/code/YourCompanyName/YourModuleName/Block/YourCustomBlock.php

<?php

namespace YourCompanyName\YourModuleName\Block;

class YourCustomBlock extends \Magento\Framework\View\Element\Template

{

    protected $_categoryCollectionFactory;

 

    protected $_categoryHelper;

  

    public function __construct(

        \Magento\Framework\View\Element\Template\Context $context,

        \Magento\Catalog\Model\ResourceModel\Category\CollectionFactory $categoryCollectionFactory,

        \Magento\Catalog\Helper\Category $categoryHelper,

        array $data = []

    ) {

        $this->_categoryCollectionFactory = $categoryCollectionFactory;

        $this->_categoryHelper = $categoryHelper;

        parent::__construct($context, $data);

    }

  

    public function getCategoryCollection($isActive = true, $level = false, $sortBy = false, $pageSize = false) {

        $collection = $this->_categoryCollectionFactory->create();

        $collection->addAttributeToSelect('*');

  

        // select only active categories

        if ($isActive) {

            $collection->addIsActiveFilter();

        }

  

        // select categories of certain level

        if ($level) {

            $collection->addLevelFilter($level);

        }

  

        // sort categories by some value

        if ($sortBy) {

            $collection->addOrderField($sortBy);

        }

  

        // set pagination

        if ($pageSize) {

            $collection->setPageSize($pageSize);

        }

  

        return $collection;

    }

  

    public function getStoreCategories($sorted = false, $asCollection = false, $toLoad = true) {

        return $this->_categoryHelper->getStoreCategories($sorted = false, $asCollection = false, $toLoad = true);

    }

}

 

 

 

////////////////////////////////////////////////////////////////////

 

view (.phtml) file as follows.

 

// get the list of all categories

$categories = $block->getCategoryCollection();

foreach ($categories as $category) {

    echo $category->getId() . '<br />';

    echo $category->getName() . '<br />';

}

  

// get categories sorted by category name

$categories = $block->getCategoryCollection(true, false, 'name', false);

foreach ($categories as $category) {

    echo $category->getId() . '<br />';

    echo $category->getName() . '<br />';

}

  

// get current store’s categories

$categories = $block->getStoreCategories();

foreach ($categories as $category) {

    echo $category->getId() . '<br />';

    echo $category->getName() . '<br />';

}

 

 

 

////////////////////////////////////////////////////////////////////

Using Object Manager

 

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();

 

// get the list of all categories

$categoryCollection = $objectManager->get('\Magento\Catalog\Model\ResourceModel\Category\CollectionFactory');

$categories = $categoryCollection->create();

$categories->addAttributeToSelect('*');

  

foreach ($categories as $category) {

    echo $category->getId() . '<br />';

    echo $category->getName() . '<br />';

    echo $category->getUrl() . '<br />';

}

 

// get current store’s categories

$categoryHelper = $objectManager->get('\Magento\Catalog\Helper\Category');

$categories = $categoryHelper->getStoreCategories();

  

foreach ($categories as $category) {

    echo $category->getId() . '<br />';

    echo $category->getName() . '<br />';

}