这段程序会输出什么？

<?php
final class CodeBox
{
    public function __construct(private array $values) {}
    public function __get(string $name): mixed
    {
        echo "get:{$name}\n";
        return $this->values[$name];
    }
}
$box = new CodeBox(['code' => 'A7']);
echo $box->code, PHP_EOL;