How to store php user information cache

php can save user information in session or cookie.

 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 = '334246'; //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：
";
print_r($uinfo);

PHP session variables are used to store information about the user session (session), or to change the settings of the user session (session). Session variables store information for a single user and are available to all pages in the application.

Cookies are often used to identify users. A cookie is a small file that a server leaves on a user's computer. Each time the same computer requests a page through the browser, the cookie will be sent to the computer. With PHP, you can create and retrieve cookie values.

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