学习js语言的基础
这是文件上传的代码
upload.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>简单文件上传</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 600px;
margin: 0 auto;
padding: 20px;
}
.upload-container {
border: 2px dashed #ccc;
padding: 20px;
text-align: center;
border-radius: 5px;
}
.upload-btn {
background-color: #4CAF50;
color: white;
padding: 10px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
margin-top: 15px;
}
.upload-btn:hover {
background-color: #45a049;
}
.note {
font-size: 14px;
color: #666;
margin-top: 10px;
}
</style>
</head>
<body>
<h1>文件上传</h1>
<form action="upload.php" method="post" enctype="multipart/form-data">
<div class="upload-container">
<h3>选择要上传的文件</h3>
<input type="file" name="file" id="file" οnchange="CheckFileExt(this.value)">
<p class="note">注意：实际文件上传需要服务器端处理脚本</p>
<button type="submit" class="upload-btn">上传文件</button>
</div>
</form>
<script>
function CheckFileExt(filename){
//定义白名单
var exts=['png','gif','jpg','mp4'];
//以.分割传递参数
var index=filename.lastIndexOf(".");
//拿到分割的后面数据
var ext= filename.substr(index+1)
for(i=0;i<exts.length;i++){
//后缀名匹配成功
if (ext == exts[i]){
var flag = true;
alert("zque");
break
}
}
if (!flag){
alert('cuol');
local.reload(true);
}
}
</script>
</body>
</html>
upload.php
<?php //拿到上传文件并保存文件 $name = $_FILES['file']['name']; $type = $_FILES['file']['type']; $size = $_FILES['file']['size']; $temp_name = $_FILES['file']['tmp_name']; $error = $_FILES['file']['error']; move_uploaded_file($temp_name, './'.$name);
这是一个简单的登录界面 可以在js做认证 也可以在php中进行认证
login.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>后台登录</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Microsoft YaHei', Arial, sans-serif;
}
body {
background-color: #f5f5f5;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
.login-container {
background-color: white;
border-radius: 8px;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
padding: 40px;
width: 100%;
max-width: 400px;
text-align: center;
}
.login-title {
font-size: 24px;
color: #333;
margin-bottom: 30px;
font-weight: 600;
}
.form-group {
margin-bottom: 20px;
text-align: left;
}
.form-group label {
display: block;
margin-bottom: 8px;
color: #555;
font-size: 14px;
}
.form-control {
width: 100%;
padding: 12px 15px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 14px;
transition: border-color 0.3s;
}
.form-control:focus {
border-color: #409eff;
outline: none;
}
.login-btn {
width: 100%;
padding: 12px;
background-color: #409eff;
color: white;
border: none;
border-radius: 4px;
font-size: 16px;
cursor: pointer;
transition: background-color 0.3s;
margin-top: 10px;
}
.login-btn:hover {
background-color: #66b1ff;
}
.footer {
margin-top: 20px;
color: #999;
font-size: 12px;
}
</style>
</head>
<body>
<div class="login-container">
<h1 class="login-title">后台登录</h1>
<div class="form-group">
<label for="username">用户名：</label>
<input type="text" name="username" id="username" class="user" placeholder="请输入用户名">
</div>
<div class="form-group">
<label for="password">密码：</label>
<input type="password" name="password" id="password" class="pass" placeholder="请输入密码">
</div>
<button type="submit" class="login-btn">登录</button>
<div class="footer">
©2023 系统后台管理
</div>
</div>
//调用jquery模块
//这是一个html美化的模块
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
$("button").click(function(e) {//点击submit后执行funcation
e.preventDefault(); // 阻止表单提交
//调用模块方法
$.ajax({
//定义一下传递的参数
type: 'POST',
url: 'login.php',
data: {
//接收传参
myuser: $('.user').val(),
mypass: $('.pass').val()
},
//成功后的动作
success: function(res) {
//判定数值的正确
if (res['infoCode']==1){
alert('cg')
window.location.href = res.redirect; // 使用服务器返回的跳转地址
// location.href='index.php';
}else {
alert('404')
}
},
error: function(xhr, status, error) {
console.error("请求失败:", error);
},
dataType: 'json'
});
});
</script>
</body>
</html>
login.php
<?php
header('Content-Type: application/json'); // 声明返回 JSON 格式
$user = $_POST['myuser'] ?? '';
$pass = $_POST['mypass'] ?? '';
//真实情况下要去数据库判断啊
$success = array('msg' => 'ok');//声明一个数组 进行初始化
if($user == 'admin' && $pass == '123456'){
$success['infoCode'] = 1;
$success['redirect'] = 'index.php'; // 添加跳转地址到JSON响应中
}else{
$success['infoCode'] = 0;
}
echo json_encode($success);// 返回 JSON 数据
?>
这是一个提交数据界面
shop.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>商品购买</title>
</head>
<body>
<table border="0" cellpadding="10" cellspacing="0" align="center">
<tr>
<td colspan="2" align="center">
<img src="iphone.jpg" width="300" height="300" alt="iPhone图片">
</td>
</tr>
<tr>
<td align="right"><b>金钱：</b></td>
<td>10000</td>
</tr>
<tr>
<td align="right"><b>商品价格：</b></td>
<td>8888</td>
</tr>
<tr>
<td align="right"><b>数量：</b></td>
<td>
<input type="text" name="number" class="number" size="5">
<button>购买</button>
</td>
</tr>
</table>
</body>
//调用模块
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
$("button").click(function(e) {
e.preventDefault(); // 阻止表单提交
$.ajax({
type: 'POST',
url: 'shop.php',
data: {
num: $('.number').val()
},
success: function(res) {
if (res['infoCode']==1){
alert('cg')
window.location.href = res.redirect; // 使用服务器返回的跳转地址
// location.href='index.php';
}else {
alert('404')
}
},
error: function(xhr, status, error) {
console.error("请求失败:", error);
},
dataType: 'json'
});
});
</script>
</html>
shop.php
<?php
header('Content-Type: application/json'); // 声明返回 JSON 格式
$num = $_POST['num'] ?? '';
$success = array('msg' => 'ok');//声明一个数组 进行初始化
if (10000>(8888*$num)) {
$success['infoCode'] = 1;
$success['redirect'] = 'index.php'; // 添加跳转地址到JSON响应中
} else {
$success['infoCode'] = 0;
}
echo json_encode($success);// 返回 JSON 数据
简单的js使用方法