微信点餐系统php（微信点餐系统小程序）

微信点餐系统是一个基于微信平台的在线点餐系统，用户可以通过微信小程序进行菜品浏览、下单、支付等操作。以下是一个简单的微信点餐系统的PHP代码示例：

1. 创建数据库表：

   
   CREATE TABLE `menu` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `name` varchar(255) NOT NULL,
   `price` decimal(10,2) NOT NULL,
   PRIMARY KEY (`id`)
   ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE order ( id int(11) NOT NULL AUTO_INCREMENT, menu_id int(11) NOT NULL, quantity int(11) NOT NULL, total_price decimal(10,2) NOT NULL, status varchar(255) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2. 编写菜单列表接口：
```php
<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// 查询菜单列表
$sql = "SELECT * FROM menu";
$result = $conn->query($sql);

// 返回JSON格式的菜单列表
$menu_list = array();
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        $menu_item = array(
            'id' => $row['id'],
            'name' => $row['name'],
            'price' => $row['price']
        );
        array_push($menu_list, $menu_item);
    }
}

echo json_encode($menu_list);

$conn->close();
?>

3. 编写下单接口：

   
   <?php
   // 连接数据库
   $servername = "localhost";
   $username = "username";
   $password = "password";
   $dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname); if ($conn->connect_error) { die("Connection failed: " . $conn->connect_error); }

// 获取POST请求参数 $menu_id = $_POST['menu_id']; $quantity = $_POST['quantity'];

// 查询菜品价格 $sql = "SELECT price FROM menu WHERE id = $menu_id"; $result = $conn->query($sql); $row = $result->fetch_assoc(); $price = $row['price'];

// 计算总价 $total_price = $price * $quantity;

// 插入订单数据 $sql = "INSERT INTO order (menu_id, quantity, total_price, status) VALUES ($menu_id, $quantity, $total_price, '待支付')"; if ($conn->query($sql) === TRUE) { echo "下单成功"; } else { echo "下单失败: " . $conn->error; }

$conn->close(); ?>

以上代码仅为示例，实际开发中还需要考虑安全性、支付接口集成、订单管理等功能的实现。