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🗣 Wd提问: 点餐系统源码PHP

🤖 Ai回答:
以下是一个简单的 PHP 点餐系统源码示例，包含基本功能：菜品展示、添加到购物车、下单等。该系统使用 MySQL 数据库存储数据，适合初学者学习和扩展。

📁 项目结构

point-order-system/
├── index.php 首页（菜单展示）
├── cart.php 购物车页面
├── order.php 下单页面
├── add_to_cart.php 添加商品到购物车
├── db.php 数据库连接
├── config.php 配置文件
└── database/
├── dishes.sql 初始化数据库脚本

✅ 1、`db.php` — 数据库连接

php
<?php
$host = 'localhost';
$dbname = 'restaurant';
$username = 'root';
$password = '';

try {
$pdo = new PDO(mysql:host=$host;dbname=$dbname, $username, $password);
$pdo-setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
die(连接失败: 、$e-getMessage());
}
?

✅ 2、`dishes.sql` — 创建数据库表

sql
CREATE DATABASE IF NOT EXISTS restaurant;
USE restaurant;

CREATE TABLE IF NOT EXISTS dishes (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(100) NOT NULL,
price DECIMAL(10,2) NOT NULL,
description TEXT,
image VARCHAR(255)
);

INSERT INTO dishes (name, price, description, image) VALUES
('宫保鸡丁', 28.00, '经典川菜，麻辣鲜香', 'gongbao.jpg'),
('红烧肉', 32.00, '肥而不腻，入口即化', 'hongshao.jpg'),
('麻婆豆腐', 18.00, '麻辣嫩滑，下饭神器', 'mapo.jpg'),
('清炒时蔬', 15.00, '新鲜蔬菜，健康之选', 'chao.shu.jpg');

✅ 3、`index.php` — 菜单展示页

php
<?php
require_once 'db.php';

$stmt = $pdo-query(SELECT * FROM dishes);
$dishes = $stmt-fetchAll();
?

<!DOCTYPE html
<html lang=zh
<head
<meta charset=UTF-8
<title点餐系统</title
<style
body { font-family: Arial, sans-serif; margin: 20px; }
.dish { border: 1px solid ccc; padding: 10px; margin: 10px; display: inline-block; width: 250px; }
.dish img { width: 100%; height: 150px; object-fit: cover; }
.price { color: red; font-weight: bold; }
button { margin-top: 10px; padding: 5px 10px; }
</style
</head
<body
<h1欢迎光临餐厅</h1
<div
<?php foreach ($dishes as $dish): ?
<div class=dish
<img src=<?= htmlspecialchars($dish['image']) ? alt=<?= htmlspecialchars($dish['name']) ?
<h3<?= htmlspecialchars($dish['name']) ?</h3
<p class=price¥<?= number_format($dish['price'], 2) ?</p
<p<?= htmlspecialchars($dish['description']) ?</p
<form action=add_to_cart.php method=POST
<input type=hidden name=dish_id value=<?= $dish['id'] ?
<input type=number name=quantity min=1 value=1 required
<button type=submit加入购物车</button
</form
</div
<?php endforeach; ?
</div
<a href=cart.php查看购物车</a
</body
</html

✅ 4、`add_to_cart.php` — 添加商品到购物车

php
<?php
session_start();
require_once 'db.php';

if ($_POST['dish_id']) {
$dish_id = $_POST['dish_id'];
$quantity = $_POST['quantity'];

if (!isset($_SESSION['cart'])) {
$_SESSION['cart'] = [];
}

if (isset($_SESSION['cart'][$dish_id])) {
$_SESSION['cart'][$dish_id] += $quantity;
} else {
$_SESSION['cart'][$dish_id] = $quantity;
}

header(Location: index.php);
exit;
}
?

✅ 5、`cart.php` — 购物车页面

php
<?php
session_start();
require_once 'db.php';

$total = 0;
$cart_items = [];

if (isset($_SESSION['cart'])) {
$dish_ids = array_keys($_SESSION['cart']);
$in_clause = str_repeat('?,', count($dish_ids) 1) 、'?';
$stmt = $pdo-prepare(SELECT id, name, price FROM dishes WHERE id IN ($in_clause));
$stmt-execute($dish_ids);
$dishes = $stmt-fetchAll();

foreach ($dishes as $dish) {
$cart_items[] = [
'id' = $dish['id'],
'name' = $dish['name'],
'price' = $dish['price'],
'quantity' = $_SESSION['cart'][$dish['id']]
];
$total += $dish['price'] * $_SESSION['cart'][$dish['id']];
}
}
?

<!DOCTYPE html
<html lang=zh
<head
<meta charset=UTF-8
<title购物车</title
<style
table { width: 100%; border-collapse: collapse; }
th, td { border: 1px solid ddd; padding: 8px; text-align: left; }
.total { font-weight: bold; }
</style
</head
<body
<h1购物车</h1
<table
<thead
<tr
<th商品</th
<th单价</th
<th数量</th
<th小计</th
</tr
</thead
<tbody
<?php foreach ($cart_items as $item): ?
<tr
<td<?= htmlspecialchars($item['name']) ?</td
<td¥<?= number_format($item['price'], 2) ?</td
<td<?= $item['quantity'] ?</td
<td¥<?= number_format($item['price'] * $item['quantity'], 2) ?</td
</tr
<?php endforeach; ?
</tbody
</table
<p class=total总价：¥<?= number_format($total, 2) ?</p
<a href=order.php提交订单</a
<a href=index.php继续购物</a
</body
</html

✅ 6、`order.php` — 提交订单

php
<?php
session_start();
require_once 'db.php';

if (!isset($_SESSION['cart']) empty($_SESSION['cart'])) {
header(Location: cart.php);
exit;
}

// 模拟保存订单（实际中应存入订单表）
$order_details = [];
foreach ($_SESSION['cart'] as $dish_id = $quantity) {
$stmt = $pdo-prepare(SELECT name, price FROM dishes WHERE id = ?);
$stmt-execute([$dish_id]);
$dish = $stmt-fetch();
$order_details[] = [
'name' = $dish['name'],
'price' = $dish['price'],
'quantity' = $quantity
];
}

// 清空购物车
unset($_SESSION['cart']);

// 显示订单成功页面
?

<!DOCTYPE html
<html lang=zh
<head
<meta charset=UTF-8
<title订单成功</title
</head
<body
<h1订单提交成功！</h1
<p感谢您的光临，我们会尽快为您准备餐品。</p
<ul
<?php foreach ($order_details as $item): ?
<li<?= $item['name'] ? x<?= $item['quantity'] ? (¥<?= number_format($item['price'], 2) ?)</li
<?php endforeach; ?
</ul
<a href=index.php返回首页</a
</body
</html

✅ 7、使用说明

1、创建数据库：
bash
mysql -u root -p < dishes.sql

2、上传文件到你的 Web 服务器（如 Apache + PHP）

3、访问 `index.php` 开始点餐

🔧 扩展建议

添加用户登录
支持删除购物车商品
订单管理后台
支付接口（支付宝/微信）
使用模板引擎（如 Twig）
使用 Composer 管理依赖

✅ 这是一个基础但完整的 PHP 点餐系统

Ai作答

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