对象串行化和反串行化

<?php
	include "index.php";

	$p = new person("李四",11,"男");

	//将对象串行化
	$str = serialize($p);
	
	//将字符串保存在文件夹obj.txt中
	file_put_contents("obj.txt",$str);	

	//读出字符串从文件中
	$str = file_get_contents("obj.txt");

	//反串行化
	$p = unserialize($str);

	echo $p->say();
?>