magento 2 category delete function programmatically [duplicate]

Question

I would like to delete categories and sub categories pro-grammatically in magneto 2.

Please suggest me proper code for it.

Answer 1

To test both option (an empty category tree or a already created category tree), I added a deleteAllCategories function.

This function looks like this:

<?php
...
use Magento\Catalog\Model\CategoryFactory;
use Magento\Framework\Registry;

/**
 * Class CategoryDeletion
 * @package Project\Catalog
 */
class CategoryDeletion
{
    /** @var Registry $registry */
    private $registry;


    /** @var CategoryFactory $categoryFactory */
    protected $categoryFactory

    /**
     * Category Deletion constructor.
     * @param CategoryFactory      $categoryFactory      Category Factory
     * @param Registry             $registry             Magento Registry
     */
    public function __construct(
        CategoryFactory             $categoryFactory,
        Registry                    $registry
    ) {
        $this->categoryFactory      = $categoryFactory;
        $this->registry             = $registry;
    }


    /**
     * Remove categories tree
     *
     * @return void
     */
    protected function removeCategories()
    {
        $categories = $this->categoryFactory->create()->getCollection();

        $this->registry->register("isSecureArea", true);
        foreach($categories as $category) {
            if($category->getId() > 2) {
                $category->delete();
            }
        }

    }

}

I’m using a category factory to get a collection of all available categories. In a foreach loop I call

$category->delete()

for each single category. The only thing to mention is, that is not a good idea to delete category root (has id 2). As I showed in my delete all products programmatically article, it is only possible to delete a category if you declare a secure area

The code above only works if you have injected registry and get object manager singleton. This code shows how this can be done:

class MyClass{

protected $_objectManager;
protected $_registry;
...
public function __construct(
    \Magento\Framework\Registry $registry,
    ...
    ) {
        ...
        $this->_registry = $registry;
        $this->_objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    }

May this will helps you!