<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.3.0/css/all.min.css"
        integrity="sha512-SzlrxWUlpfuzQ+pcUCosxcglQRNAq/DZjVsC0lE40xsADsfeQoEypE+enwcOiGjk/bSuGGKHEyjSoQ1zVisanQ=="
        crossorigin="anonymous" referrerpolicy="no-referrer" />
</head>
</html>
--TEST--
Issue #80 (Serialized failed on unseted value)
--SKIPIF--
<?php
if (!extension_loaded("msgpack")) {
   echo "skip";
}
--FILE--
<?php

class MyClass
{
    protected $field;

    public function preSerialize()
    {
        unset($this->field);
    }
}

$t = new MyClass();
$t->preSerialize();
var_dump(msgpack_unserialize(msgpack_serialize($t)));
?>
--EXPECTF--
object(MyClass)#%d (1) {
  ["field":protected]=>
  NULL
}
