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Overview

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.

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Example

<?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));

?>
ModesPrivate vs public object field