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' => '[email protected]',
        '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***
    $str = serialize($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);