PHP の Serializable sequence list インターフェイスの詳細な説明

Serializable {
    /* 方法 */
    abstract public string serialize ( void )
    abstract public mixed unserialize ( string $serialized )
}

<?php
/** 
 * 自定义类的序列化操作
 * 
 * @author 疯狂老司机 
 */ 
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);
$newobj = unserialize($ser);

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