localstorage 登陆注册的代码
时间: 2023-08-06 16:20:33 浏览: 93
好的,下面是一个简单的使用localstorage实现登陆注册的示例代码:
```html
<!DOCTYPE html>
<html>
<head>
<title>Login/SignUp with localStorage</title>
<script>
function signUp() {
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
// 判断用户名和密码是否为空
if (username == "" || password == "") {
alert("Please enter username and password.");
return;
}
// 将用户信息存储到localStorage中
localStorage.setItem(username, password);
alert("Sign up success!");
}
function login() {
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
// 判断用户名和密码是否匹配
if (localStorage.getItem(username) === password) {
alert("Login success!");
} else {
alert("Username or password is incorrect.");
}
}
</script>
</head>
<body>
<h1>Login/SignUp with localStorage</h1>
<label for="username">Username:</label>
<input type="text" id="username">
<br>
<label for="password">Password:</label>
<input type="password" id="password">
<br>
<button onclick="signUp()">Sign Up</button>
<button onclick="login()">Login</button>
</body>
</html>
```
这段代码实现了一个简单的登陆注册功能。用户输入用户名和密码后,点击"Sign Up"按钮可以将用户信息存储到localStorage中;点击"Login"按钮可以从localStorage中读取用户信息进行验证。需要注意的是,这段代码的安全性较低,不适合在实际应用中使用。
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<?php
session_start();
//注销登录
if(@$_GET['action'] == "logout"){
unset($_SESSION['userid']);
unset($_SESSION['username']);
echo '注销登录成功!点击此处 登录';
exit;
}
if(!isset($_POST['submit'])){
exit('非法访问!');
}
$username = htmlspecialchars($_POST['username']);
$password = MD5($_POST['password']);
//包含数据库连接文件
include('conn.php');
//检测用户名及密码是否正确
$check_query = mysql_query("select uid from user where username='$username' and password='$password' limit 1");
if($result = mysql_fetch_array($check_query)){
//登录成功
$_SESSION['username'] = $username;
$_SESSION['userid'] = $result['uid'];
echo $username,' 欢迎你!进入 用户中心
'; echo '点击此处 注销 登录!
'; exit; } else { exit('登录失败!点击此处 返回 重试'); } ?> </body> </html>
'; echo '点击此处 注销 登录!
'; exit; } else { exit('登录失败!点击此处 返回 重试'); } ?> </body> </html>