使用redis完成注册和登录

示例图：

前提是服务器安装了php-redis扩展，即phpnfo里有redis模块

1 表的设计

和mysql数据库进行对比 redis是键值对的存储方式

例如用户表：

每个用户保存两条信息因为注册时要查看一个用户名是否存在即根据用户名查看是否含有对应的userid

user:userid:1:username admin

user:username:admin:userid 1

index.php:

<div id="navbar">
    <a href="index.php">主页</a> | <a href="timeline.php">热点</a> | <a href="logout.php">退出</a>
</div>
<form method="POST" action="register.php">
<table>
<tr>
  <td>用户名</td><td><input type="text" name="username"></td>
</tr>
<tr>
  <td>密码</td><td><input type="password" name="password"></td>
</tr>
<tr>
  <td>密码(again)</td><td><input type="password" name="repassword"></td>
</tr>
<tr>
<td colspan="2" align="right"><input type="submit" name="doit" value="注册"></td></tr>
</table>
</form>

<?php
//自增userid相当于mysql的自增主键
//global:userid;
//判断cookie是否存在

if($_COOKIE['userid']&&$_COOKIE['username']){
        header('location:home.php');
}

$username = $_POST['username'];
$password = $_POST['password'];
$repassword = $_POST['repassword'];

if(!$username){
    exit('<script>alert("用户名不得为空");history.back()</script>');
}
if(!$password){
    exit('<script>alert("密码不得为空");history.back()</script>');
}
if($password!=$repassword){
    exit('<script>alert("两次密码不一致");history.back()</script>');
}

$redis = new \Redis();
$redis->connect('127.0.0.1',6379);

if($redis->get('user:username:'.$username.':userid')){
    exit('<script>alert("用户名已存在");history.back()</script>');
}
//写入数据库
$userid = $redis->incr('global:userid');

$redis->set('user:userid:'.$userid.':username',$username);
$redis->set('user:userid:'.$userid.':password',$password);
$redis->set('user:username:'.$username.':userid',$userid);

?>

<?php
if($_COOKIE['userid']&&$_COOKIE['username']){
    header('location:home.php');
}
$username = $_POST['username'];
$password = $_POST['password'];

//过滤数据
if(!$username){
    exit('<script>alert("用户名不得为空");history.back()</script>');
}
if(!$password){
    exit('<script>alert("密码不得为空");history.back()</script>');
}
//验证用户名和密码
$redis = new \Redis();
$redis->connect('127.0.0.1',6379);

$ruserid = $redis->get('user:username:'.$username.':userid');  //从数据库查用户id
$rusername = $redis->get('user:userid:'.$ruserid.':username'); //根据id查用户名
$ruserpass = $redis->get('user:userid:'.$ruserid.':password'); //根据id查密码

if(!$ruserid||($password!=$ruserpass)){
    exit('<script>alert("用户名或密码错误");history.back()</script>');
}
//生成cookie
setcookie('userid',$ruserid);
setcookie('username',$rusername);

header('location:home.php');

?>

logout.php:

<?php
//清除cookie
setcookie('userid',null);
setcookie('username',null);
header('location:home.php');
?>

home.php:

<?php
if(!$_COOKIE['userid']||!$_COOKIE['username']){
    header('location:index.php');
}

使用redis完成注册和登录

使用redis完成注册和登录

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