介绍下所创建项目的目录结构：
该项目共包含一个名为0822的文件夹，文件夹内有四个文件，文件名分别为：home.php；login.php；reginster.php；userData.json。
该项目实现了用户的登录，验证，注册与登出的完整过程。
注：所有代码保留debug过程。一切美好绝不是简简单单或信手拈来~
注：为了美观些，项目引入了Layui。
注：因个人原因，使用json文件代替了数据库。
下面为每个文件的详细代码：
login.php
<?php
session_start();
if (isset($_SESSION['username']) && isset($_SESSION['password'])){
echo '您已登陆';
header("refresh:2;url=home.php");
exit();
}
?>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>用户登录</title>
<link href="//unpkg.com/layui@2.7.6/dist/css/layui.css" rel="stylesheet">
<script src="//unpkg.com/layui@2.7.6/dist/layui.js"></script>
<style>
.box {
margin-top: 40px;
}
.right {
float: right;
}
.bbbbb{
text-align: center;
display: block;
}
</style>
</head>
<body>
<div class="layui-container box">
<div class="layui-row">
<div class="layui-col-md12">
<h1 style="margin-bottom: 15px;text-align: center;font-size: 80px">用户登录</h1>
<form class="layui-form" method="post" action="home.php">
<div class="layui-form-item">
<label class="layui-form-label">用户名</label>
<div class="layui-input-block">
<input type="text" name="username" required lay-verify="required" placeholder="请输入用户名"
autocomplete="off" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">密码框</label>
<div class="layui-input-inline">
<input type="password" name="password" required lay-verify="required" placeholder="请输入密码"
autocomplete="off" class="layui-input">
</div>
<div class="layui-form-mid layui-word-aux">默认密码是123456</div>
</div>
<div class="layui-form-item">
<div class="layui-input-block">
<button class="layui-btn" lay-submit lay-filter="formDemo">登录</button>
</div>
</div>
</form>
<div class="layui-input-inline bbbbb">
<button class="layui-btn" onclick="window.location = 'reginster.php'" >没有账号？点我去注册</button>
</div>
</div>
</div>
</div>
</body>
</html>
<script>
//Demo
layui.use('form', function () {
var form = layui.form;
var $ = layui.jquery;
// $("form").bind("submit",function (e){
// e.preventDefault();
// })
//提交
// form.on('submit(formDemo)', function (data) {
// layer.msg(JSON.stringify(data.field));
// let ddata = JSON.stringify(data.field);
// // let HTTP = new XMLHttpRequest();
// // HTTP.open('POST','./login.php')
// // $.post('home.php',JSON.stringify(data.field),function (data,status){
// // window.location = 'home.php'
// // })
// // return false;
// $.post("home.php",ddata,function(data,status){
// console.log(data);
// console.log(status);
// // window.location = 'home.php'
// })
// });
// form.submit('submit(formDemo)',function (data){
// console.log(data)
// })
});
</script>home.php
<?php
session_start();
//print_r($_GET);
if ($_GET['logout'] == 1) {
session_destroy();
echo '您已登出';
header("refresh:2;url=login.php");
exit();
}
$userData = file_get_contents(__DIR__ . '/userData.json');
$userData = json_decode($userData, true);
$_POST['username'] = trim($_POST['username']);
$_POST['password'] = trim($_POST['password']);
//print_r($userData);
foreach ($userData as $key => $value) {
if ($_POST == $value) {
$_SESSION['username'] = $value['username'];
$_SESSION['password'] = $value['password'];
}
// else{
// session_destroy();
// echo '用户名或密码不正确';
// header("refresh:2;url=login.php");
// exit();
// }
}
//var_dump(isset($_SESSION['username']));
if (!isset($_SESSION['username'])) {
session_destroy();
echo '用户名或密码不正确';
header("refresh:2;url=login.php");
exit();
}
?>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>用户主页</title>
<link href="//unpkg.com/layui@2.7.6/dist/css/layui.css" rel="stylesheet">
<script src="//unpkg.com/layui@2.7.6/dist/layui.js"></script>
<style>
.box {
margin-top: 40px;
}
.right {
float: right;
}
</style>
</head>
<body>
<ul class="layui-nav">
<li class="layui-nav-item">
<a>孙大树的用户状态管理完整解决方案</a>
</li>
<li class="layui-nav-item right">
<a href=""><img src="//t.cn/RCzsdCq" class="layui-nav-img">您好：<?= $_SESSION['username'] ?></a>
<dl class="layui-nav-child">
<dd><a href="home.php?logout=1">退出</a></dd>
</dl>
</li>
</ul>
<h1 style="text-align: center;margin-top: 50px">当前登录用户为：<?= $_SESSION['username'] ?></h1>
</body>
</html>reginster.php
<?php
$userData = file_get_contents(__DIR__ . '/userData.json');
$userData = json_decode($userData, true);
//$userData = array_push($userData,$_POST);
$userData[] = $_POST;
if (!empty($_POST)) {
if (file_put_contents(__DIR__ . '/userData.json', json_encode($userData))) {
echo '写入成功';
}
} else {
if (!empty($_POST)) {
echo '写入失败';
}
}
//print_r($userData)
?>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>用户注册</title>
<link href="//unpkg.com/layui@2.7.6/dist/css/layui.css" rel="stylesheet">
<script src="//unpkg.com/layui@2.7.6/dist/layui.js"></script>
<style>
.box {
margin-top: 40px;
}
.right {
float: right;
}
</style>
</head>
<body>
<div class="layui-container box">
<div class="layui-row">
<div class="layui-col-md12">
<h1 style="margin-bottom: 15px;text-align: center;font-size: 80px">用户注册</h1>
<form class="layui-form" method="post" action="reginster.php">
<div class="layui-form-item">
<label class="layui-form-label">用户名</label>
<div class="layui-input-block">
<input type="text" name="username" required lay-verify="required" placeholder="请输入用户名"
autocomplete="off" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">密码框</label>
<div class="layui-input-block">
<input type="password" name="password" required lay-verify="required" placeholder="请输入密码"
autocomplete="off" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<div class="layui-input-block">
<button class="layui-btn" lay-submit lay-filter="formDemo">注册</button>
</div>
</div>
</form>
</div>
</div>
</div>
</body>
</html>
<script>
//Demo
layui.use('form', function () {
var form = layui.form;
var $ = layui.jquery;
});
</script>userData.json
[
{
"username": "admin",
"password": "123456"
},
{
"username": "admin2",
"password": "123456"
}
]最终效果如下：
错误处理：
