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@ 2019-12-27T09:12:29Z

<?php

ini_set('session.serialize_handler', 'php_serialize');

class SerializableClass implements Serializable {
    public $sharedProp;
    public function __construct($prop)
    {
        $this->sharedProp = $prop;
    }
    public function __set($key, $value)
    {
        $this->$key = $value;
    }
    public function serialize()
    {
        return serialize(get_object_vars($this));
    }
    public function unserialize($data)
    {
        $ar = unserialize($data);
        if ($ar === false) {
            return;
        }
        foreach ($ar as $k => $v) {
            $this->__set($k, $v);
        }
    }
}

// Shared object that acts as property of two another objects stored in session
$testPropertyObj = new stdClass();
$testPropertyObj->name = 'test';

// Two instances of \SerializableClass that shares property
$sessionObject = [
    'obj1' => new SerializableClass($testPropertyObj),
    'obj2' => new SerializableClass($testPropertyObj),
];
session_start();
$_SESSION = $sessionObject;

$sessionString = session_encode();
session_decode($sessionString);

echo serialize($sessionObject) . "\n";
echo $sessionString . "\n";
echo "\n\n";
var_dump($_SESSION);

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: SerializableClass implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/HeLT4 on line 5 Warning: session_start(): Session cannot be started after headers have already been sent in /in/HeLT4 on line 40 Warning: session_encode(): Cannot encode non-existent session in /in/HeLT4 on line 43 Warning: session_decode(): Session data cannot be decoded when there is no active session in /in/HeLT4 on line 44 a:2:{s:4:"obj1";C:17:"SerializableClass":65:{a:1:{s:10:"sharedProp";O:8:"stdClass":1:{s:4:"name";s:4:"test";}}}s:4:"obj2";C:17:"SerializableClass":28:{a:1:{s:10:"sharedProp";r:4;}}} array(2) { ["obj1"]=> object(SerializableClass)#2 (1) { ["sharedProp"]=> object(stdClass)#1 (1) { ["name"]=> string(4) "test" } } ["obj2"]=> object(SerializableClass)#3 (1) { ["sharedProp"]=> object(stdClass)#1 (1) { ["name"]=> string(4) "test" } } }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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