unserialize(),serialize(),__wakeup(),__sleep()函数

基于序列化与反序列化，在此我只是举一个例子，For example:

class student{
    private $name;
    private $age;
    private $address;

    public function __construct($name,$age,$address){
        $this->name=$name;
        $this->age=$age;
        $this->address=$address;   
    }

    public function information(){
        echo "My name:".$this->name.";My age:".$this->age."My address:".$this->address;
    }
}

$P=new student("小明"，"25","湖北");
$P->information();

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output: My name:小明;My age:25;My address:湖北;

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For example:

class student{
    private $name;
    private $age;
    private $address;

    public function __construct($name,$age,$address){
        $this->name=$name;
        $this->age=$age;
        $this->address=$address;   
    }

    public function __sleep(){
        $arr=array("name","age");
        return ($arr);
    }

    public function __walkup(){
        $this->age=30;
    }

    public function information(){
        echo "My name:".$this->name.";My age:".$this->age."My address:".$this->address;
    }
}

$P=new student("小红",30,"湖南");
$P->information();
echo "<br>";
$String=serialize($P);
echo $String;
echo "<br>";
$String2=unserialize($String);
$String2->information();

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output:

My name:小红;My age:30My address:湖南
O:7:"student":2:{s:13:"studentname";s:6:"小红";s:12:"studentage";i:30;}
My name:小红;My age:30My address:

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参考资料:http://www.php-note.com/article/detail/35