Use PHP’s nullable types by prefixing type name with question mark (?) to mark
component fields which are optional and set a default value to prevent undesired
defaults like empty strings.
<?php
$loader = require 'vendor/autoload.php';
$loader->add('Cognesy\\Instructor\\', __DIR__ . '../../src/');
use Cognesy\Instructor\Instructor;
class UserRole
{
public string $title;
}
class UserDetail
{
public int $age;
public string $name;
public ?UserRole $role;
}
$user = (new Instructor)->respond(
messages: [["role" => "user", "content" => "Jason is 25 years old."]],
responseModel: UserDetail::class,
);
dump($user);
assert(!isset($user->role));
?>
