云vps怎么搭建网站/新闻危机公关

php魔术方法：

_sleep() 可以控制对象序列化时真正处理的部分

_wakeup() 在反序列化后还原对象属性

_toString() 对象转换成为字符串的机制

把php变量转换成一串编码后字符串，方法为serialize() 反序列化unserialize()

//序列化

class testSerialize{

public $a = 10;

public $b = 15;

public $c = 20;

function _construct(){

$this->b = $this->a * 10;

$this->c = $this->b * 2;

}

}

$k = serialize(new testSerialize());

echo $k;//

out: O:13:"testSerialize":3:{s:1:"a";i:10;s:1:"b";i:15;s:1:"c";i:20;}

$j = unserialize($k);

sleep方法：

class testSerialize1{

public $a = 10;

public $b = 15;

public $c = 20;

function _construct(){

$this->b = $this->a * 10;

$this->c = $this->b * 2;

}

function __sleep(){

return $this->a;

}

}

$k = serialize(new testSerialize1());

echo $k;

其他方法同理