How to programmatically create category attribute in Magento

Step 1: Define Function

Magento 1

<?xml version='1.0'?>
<config>
  <modules>
    <MageCheck_CategoryAttribute>
      <version>0.0.1</version>
    </MageCheck_CategoryAttribute>
  </modules>
    <global>
      <resources>
          <customcatattrb_setup>
            <setup>
              <module>MageCheck_CategoryAttribute</module>
              <class>Mage_Eav_Model_Entity_Setup</class>
            </setup>
            <connection>
              <use>default_setup</use>
            </connection>
          </customcatattrb_setup>
      </resources>
    </global>
</config>

File path: app/code/local/MageCheck/CategoryAttribute/etc/config.xml

Magento 2

<?php

namespace MageCheck\Tutorial\Setup;

use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Framework\Setup\InstallDataInterface;

class InstallData implements InstallDataInterface
{
    private $eavSetupFactory;
 
    public function __construct(EavSetupFactory $eavSetupFactory)
    {
        $this->eavSetupFactory = $eavSetupFactory;
    }
 
    public function install(ModuleDataSetupInterface $setup, ModuleContextInterface $context)
    {
        $setup->startSetup();
        
	$this->createCategoryAttribute($setup);
 
        $setup->endSetup();
    }
    
    public function createCategoryAttribute($setup)
    {
        // ...
    }
}

Step 2: Create Function

Magento 1

<?php

$installer = $this;
$installer->startSetup();
$attribute  = array(
    'type' => 'text',
    'label'=> 'Extension Attribute',
    'input' => 'textarea',
    'global' => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
    'visible' => true,
    'required' => false,
    'user_defined' => true,
    'default' => '',
    'group' => 'General Information'
);
$installer->addAttribute('catalog_category', 'extension_attribute', $attribute);
$installer->endSetup();

File path: app/code/local/MageCheck/CategoryAttribute/sql/customcatattrb_setup/mysql4-install-0.0.1

Magento 2

public function createCategoryAttribute($setup)
{
    $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);
 
    $eavSetup->addAttribute(
        \Magento\Catalog\Model\Category::ENTITY,
        'extension_attribute',
        [
            'type' => 'text',
            'label' => 'Extension Attribute',
            'input' => 'textarea',
            'required' => false,
            'sort_order' => 4,
            'global' => \Magento\Eav\Model\Entity\Attribute\ScopedAttributeInterface::SCOPE_STORE,
            'wysiwyg_enabled' => true,
            'is_html_allowed_on_front' => true,
            'group' => 'General Information',
        ]
    );
}

This is the sample way to Programmatically create Category Attribute in Magento!

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Magento How to Programmatically Create Category Attribute

Step 1: Define Function

Magento 1

Magento 2

Step 2: Create Function

Magento 1

Magento 2

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