# The Serializable interface

Domains:

## Introduction

Interface for customized serializing.

Classes that implement this interface no longer support __sleep() and __wakeup(). The method serialize is called whenever an instance needs to be serialized. This does not invoke __destruct() or have any other side effect unless programmed inside the method. When the data is unserialized the class is known and the appropriate unserialize() method is called as a constructor instead of calling __construct(). If you need to execute the standard constructor you may do so in the method.

## Interface synopsis

Serializable {
/* Methods */
abstract public serialize ( void ) : string
abstract public unserialize ( string $serialized ) : void }  Example #1 Basic usage <?php class obj implements Serializable { private$data;
public function __construct() {
$this->data = "My private data"; } public function serialize() { return serialize($this->data);
}
public function unserialize($data) {$this->data = unserialize($data); } public function getData() { return$this->data;
}
}

$obj = new obj;$ser = serialize($obj); var_dump($ser);

$newobj = unserialize($ser);

var_dump(\$newobj->getData());
?>


The above example will output something similar to:

string(38) "C:3:"obj":23:{s:15:"My private data";}"
string(15) "My private data"