Magento 2 observer for sales_order_place_after

Question

I observe the event sales_order_place_after If I buy like guest or new user custumer name, lastname is NULL if I buy logged name, lastname is normal

$observer->getOrder()->getCustomerFirstname();

I use Magento 2.1.11

How fix it ?

Answer 1

Use this solution

$Order =$observer->getOrder();

    if($Order->getCustomerIsGuest())
    { // if  customer is guest
    $firstname = $Order->getBillingAddress()->getFirstname();
    $lastname = $Order->getBillingAddress()->getLastname()
    }else{
       $firstname = $Order->getCustomerFirstname();
    $lastname = $Order->getCustomerLastname()
    }