Automatically populate PHP object from Array

PayloadMessage.php

<?php declare(strict_types=1);

namespace Acme\Shared\Application\Service;

trait PayloadMessage
{
    private function __construct()
    {}

    /**
     * @param array $payload
     *
     * @return static
     * @todo Return static.
     * @see  https://stitcher.io/blog/php-8-before-and-after#static-instead-of-doc-blocks
     */
    public static function fromPayload(array $payload)
    {
        $self = new static();

        foreach (get_class_vars(get_class($self)) as $varName => $varValue) {
            if (array_key_exists($varName, $payload)) {
                $self->$varName = $payload[$varName];
            }
        }

        return $self;
    }
}

The current solution does not work e.g. for arrays.

use Symfony\Component\Validator\Constraints as Assert;

final class AddPerson
{
    use PayloadMessage;
    
    #[Assert\NotNull]
    #[Assert\Type('array')]
    private array $biographicInformation;
}

$command = AddPerson::fromPayload(
    [
	"biographicInformation": "a"
    ]
);

Cannot assign string to property AddPerson::$biographicInformation of type array