Halon

class Foo
{
    $value = 0;

    function serialize() {
        $data = [];
        foreach ($this as $k => $v)
            if (!is_function($v))
                $data[$k] = $v;
        return $data;
    }

    function unserialize($data) {
        foreach ($data as $k => $v)
            $this[$k] = $v;
        return $this;
    }
}

$x = Foo();
$x->value = 123;

$export = json_decode(json_encode($x->serialize()));

$y = Foo()->unserialize($export);
echo $y->value;