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@ 2014-10-08T11:51:28Z

<?php
class parentobj implements Serializable 
{
    private $data;
    protected $extradata;

    public function __construct() {
        $this->data = "My private data";
    }

    public function getData() {
        return $this->data;
    }

	public function setData($data) {
		$this->data = $data;
    }

    public function getExtraData(){
        $this->extradata = array(
                'data1','data2'
            );
    }

    public function serialize() {
        return serialize(array(
                $this->data,
                $this->extradata,
            ));
    }
    public function unserialize($data) {
        $orgdata = unserialize($data);
        $this->data = $orgdata[0];
        $this->extradata = $orgdata[1];
    }
}

class childobj extends parentobj
{

	public function __construct() {
        return parent::__construct();
    }

	public function getExtraData(){
        $this->extradata = array(
                'datachild1','datachild2'
            );
    }

	public function serialize() {
        return serialize(array(
                $this->getData(),
                $this->extradata,
            ));
    }
    public function unserialize($data) {
        $orgdata = unserialize($data);
        $this->setData($orgdata[0]);
        $this->extradata = $orgdata[1];
    }
}

$obj = new childobj();
$s = serialize($obj);
echo 'first serialize: '; var_dump($s);
$u = unserialize($s);
echo 'first unserialize: '; var_dump($u);
$u->getExtraData();
echo 'with extradata: '; var_dump($u);
$s2 = serialize($u);
echo 'second serialize: '; var_dump($s2);
$u2 = unserialize($s2);
echo 'second unserialize: '; var_dump($u2);

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: parentobj 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/d8cXR on line 2 Deprecated: childobj 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/d8cXR on line 38 first serialize: string(59) "C:8:"childobj":39:{a:2:{i:0;s:15:"My private data";i:1;N;}}" first unserialize: object(childobj)#2 (2) { ["data":"parentobj":private]=> string(15) "My private data" ["extradata":protected]=> NULL } with extradata: object(childobj)#2 (2) { ["data":"parentobj":private]=> string(15) "My private data" ["extradata":protected]=> array(2) { [0]=> string(10) "datachild1" [1]=> string(10) "datachild2" } } second serialize: string(107) "C:8:"childobj":87:{a:2:{i:0;s:15:"My private data";i:1;a:2:{i:0;s:10:"datachild1";i:1;s:10:"datachild2";}}}" second unserialize: object(childobj)#3 (2) { ["data":"parentobj":private]=> string(15) "My private data" ["extradata":protected]=> array(2) { [0]=> string(10) "datachild1" [1]=> string(10) "datachild2" } }

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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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