PHP 객체지향 직렬화 및 역직렬화 관련 코드 설명

string serialize ( mixed $value )

__PHP_Incomplete_Class Object
(
    [__PHP_Incomplete_Class_Name] => Person
    [name:Person:private] => jack
    [age:Person:private] => 18
    [sex:Person:private] => M
)
<!--?php 
class Person {
    private $name;
    private $age;
    private $sex;
    function __construct($name, $age, $sex) {
        $this--->name = $name;
        $this->age = $age;
        $this->sex = $sex;
    } 
    function __sleep() {
        $arr = array(&#39;name&#39;, &#39;age&#39;);
        return $arr;
    }
    function __wakeup() {
        $this->sex = &#39;F&#39;;
        $this->age = 20;
    }
    function say() {
        echo &#39;My name is: &#39; . $this->name . &#39;,My age is: &#39; . $this->age . &#39;,My sex is: &#39; . $this->sex . PHP_EOL;
    }
}
$p = new Person(&#39;jack&#39;, 18, &#39;M&#39;);
$p->say(); // My name is: jack,My age is: 18,My sex is: M
$s = serialize($p); //得到（O:6:"Person":3:{s:12:"Personname";s:4:"jack";s:11:"Personage";i:18;s:11:"Personsex";s:1:"M";}）字符串，有特殊字符
echo $s . PHP_EOL;
$o = unserialize($s); // 反序列化之前必须要定义这个对象的类
$o->say(); // My name is: jack,My age is: 20,My sex is: F