PHP session

---

	<?php
	session_start();
	//假设用户登录成功获得了以下用户数据
	$userinfo = array(
	    'uid'  => 10000,
	    'name' => 'spark',
	    'email' => 'spark@imooc.com',
	    'sex'  => 'man',
	    'age'  => '18'
	);

	header("content-type:text/html; charset=utf-8");
	
	/* 将用户信息保存到session中 */
	$_SESSION['uid'] = $userinfo['uid'];
	$_SESSION['name'] = $userinfo['name'];
	$_SESSION['userinfo'] = $userinfo;
	
	//* 将用户数据保存到cookie中的一个简单方法 */
	$secureKey = 'imooc'; //加密密钥
	$str = serialize($userinfo); //将用户信息序列化
	//用户信息加密前
	$str = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($secureKey), $str, MCRYPT_MODE_ECB));
	//用户信息加密后
	//将加密后的用户数据存储到cookie中
	setcookie('userinfo', $str);
	
	//当需要使用时进行解密
	$str = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($secureKey), base64_decode($str), MCRYPT_MODE_ECB);
	$uinfo = unserialize($str);
	echo "解密后的用户信息：<br>";
	print_r($uinfo);