在 PHP 及以上版本中用类型重载方法应该是这样的

$userrepository = new userrepository();
$userrepository->add('micheal', 'jordan', 23);
$userrepository->add('micheal jordan', 23);
$userrepository->add(new user("micheal", "jordan", 23));
$userrepository->add(new userdto("micheal", "jordan", 23));
$userrepository->add(['fist_name' => 'micheal', 'last_name' => 'jordan', 'number' => 23]);

public function add(mixed ...$args): void
{
    $addMethodOverloader = MethodOverloader::create($this)
        ->register($this->addByFirstNameLastNameAndNumber(...),'string', 'string', 'int')
        ->register($this->adddByUser(...), User::class)
        ->register($this->addByUserDto(...), UserDto::class)
        ->register($this->addByArray(...), 'array')
        ->register($this->addNyNameAndNumber(...), 'string', 'int')
        ->onFailure(function() {
            throw new MyCustomException();
        });

    $addMethodOverloader->invoke($args);
}