How to Get Attribute Id by attribute code Magento 2?

Fetch Attribute Id from the attribute code in Magento 2 to using AttributeRepository Interface Class.

You need Entity type value and the attribute code.

Just instantiate the Magento\Eav\Api\AttributeRepositoryInterface class to retrieve the id value.

<?php
namespace Jesadiya\AttributeId\Model;

use Magento\Catalog\Model\Product;
use Magento\Eav\Api\AttributeRepositoryInterface;

class GetAttribute implements DataPatchInterface
{
    /**
     * @var AttributeRepositoryInterface
     */
    private $attributeRepository;

    public function __construct(
        AttributeRepositoryInterface $attributeRepository
    ) {         $this->attributeRepository = $attributeRepository;
    }

    public function getAttributeId()
    {
        $attribute = $this->attributeRepository->get(Product::ENTITY, 'sku');
        return $$attribute->getAttributeId();
    }
}

Here, We are fetching Product SKU attribute Id programmatically. You can pass any attribute value you want to retrieve it with entity type.

$getId = $this->getAttributeId();
The id will be the integer value of the attribute.

You can be interested to read Get Attribute id by product id Magento 2