--- date: 20201116 id: de7c8974-5636-4e6d-baf7-afc90985c535 title: Hostname Constraint --- # Description Validates hostname # Syntax ``` php // src/Entity/ServerSettings.php namespace App\Entity; use Symfony\Component\Validator\Constraints as Assert; class ServerSettings { /** * @Assert\Hostname(message="The server name must be a valid hostname.") */ protected $name; } ```