PHP Bug #62189

<?php

$widgets = array();

class Widget implements Serializable
{
    public $references = array();

    public function serialize()
    {
        $vars = get_object_vars($this);

        $serialized = serialize($vars);

        return $serialized;
    }

    public function unserialize($serialized)
    {
        $array = unserialize($serialized);

        foreach($array as $k => $v)
        {
            $this->$k = $v;
        }
    }
}

class Placeholder
{
    public $id;

    public function __construct($id)
    {
        $this->id = $id;
    }
}

$placeholder1 = new Placeholder(1);
$placeholder2 = new Placeholder(2);

$widgets[0] = new Widget;
$widgets[0]->references[] = $placeholder1;

$widgets[1] = new Widget;
$widgets[1]->references[] = $placeholder2;

$widgets[2] = new Widget;
$widgets[2]->references[] = $placeholder1;

$widgets[3] = new Widget;
$widgets[3]->references[] = $placeholder1;

echo serialize($widgets);
//var_dump(unserialize(serialize($widgets)));