Magento 2 - how to update customer Info?

Question

How to update the customer information in Magento 2 (Code to set data for customer).
Example: Update email_backup column of customer_entity table.

Answer 1

The email_backup is the custom customer attribute. We can use Magento\Customer\Api\CustomerRepositoryInterface to save the customer info.

/**
 * @var CustomerRepositoryInterface
 */
protected $customerRepository;

public function __construct(

    CustomerRepositoryInterface $customerRepository
)
{

    $this->customerRepository = $customerRepository;
}

We can save:

$customer = $this->customerRepository->getById($customerId);

$customer->setCustomAttribute('email_backup', $emailBackupData);
$this->customerRepository->save($customer);