How to remove custom attribute of category using object manager in magento 2

Question

I created 4 custom attributes for category. Now I want to remove it. I want to use object manager for delete attributes and its values.

See this image. Created attributes are display in this manner. enter image description here

Now I created one file delete_attribute.php in magento root folder.

<?php
ini_set('display_errors', 1);
//ini_set('memory_limit','-1');
error_reporting(E_ALL);
use Magento\Framework\App\Bootstrap;
require __DIR__ . '/app/bootstrap.php';
$bootstrap = Bootstrap::create(BP, $_SERVER);
$obj = $bootstrap->getObjectManager();
$storeManager = $obj->get('\Magento\Store\Model\StoreManagerInterface');
$objectManager = \Magento\Framework\App\ObjectManager::getInstance(); 
$state = $objectManager->get('Magento\Framework\App\State');
//$state->setAreaCode('frontend');
$state->setAreaCode('adminhtml');
// 165
// attribute_code1
// \Magento\Catalog\Model\Category
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$category = $objectManager->get('Magento\Framework\Registry')->registry('attribute_code1'); //Get Current Category
$PCategory = $objectManager->get('Magento\Catalog\Model\CategoryFactory')->create()->load(165);
echo $PCategory->getIsCollectionPageListing();
print_r($PCategory);
?>

Does anyone know how to delete these 4 attributes using object manager ?

Thanks in advance.

Answer 1

Create ../Setup/UpgradeData.php file:

<?php
namespace Vendor\Module\Setup;
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Framework\Setup\UpgradeDataInterface;
class UpgradeData implements UpgradeDataInterface
{
 private $eavSetupFactory;
 /**
 * UpgradeData constructor.
 * @param EavSetupFactory $eavSetupFactory
 */
 public function __construct(EavSetupFactory $eavSetupFactory)
 {
 $this->eavSetupFactory = $eavSetupFactory;
 }
 /**
 * @param ModuleDataSetupInterface $setup
 * @param ModuleContextInterface $context
 */
 public function upgrade(
 ModuleDataSetupInterface $setup,
 ModuleContextInterface $context
 ) {
 $setup->startSetup();
 if (version_compare($context->getVersion(), '1.0.1') < 0) { // 1.0.1 is your new version in module.xml
 $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);
 $eavSetup->removeAttribute(
 \Magento\Customer\Model\Customer::ENTITY,
 'sample_attribute'
 );
 }
 $setup->endSetup();
 }
}

• Chirag Parmar: I want it using object manager.