PHPCMS搭建餐饮美食网站的菜品推荐与预订

<?php
// 菜品推荐算法
function recommendDishes($userId) {
    $userHistory = getUserHistory($userId);
    $popularDishes = getPopularDishes();
    $recommended = array();

    foreach ($userHistory as $dish) {
        $similarDishes = getSimilarDishes($dish);
        $recommended = array_merge($recommended, $similarDishes);
    }

    $recommended = array_unique($recommended);
    $recommended = array_merge($recommended, $popularDishes);

    return array_slice($recommended, 0, 10);
}

function getUserHistory($userId) {
    // 从数据库中获取用户历史订单
}

function getPopularDishes() {
    // 从数据库中获取热门菜品
}

function getSimilarDishes($dish) {
    // 根据菜品特征获取相似菜品
}
?>

<?php
// 菜品预订流程
class Reservation {
    private $userId;
    private $dishIds;
    private $reservationTime;
    private $quantity;

    public function __construct($userId, $dishIds, $reservationTime, $quantity) {
        $this->userId = $userId;
        $this->dishIds = $dishIds;
        $this->reservationTime = $reservationTime;
        $this->quantity = $quantity;
    }

    public function submit() {
        $orderId = generateOrderId();
        $success = saveOrder($this->userId, $this->dishIds, $this->reservationTime, $this->quantity, $orderId);
        if ($success) {
            sendConfirmationEmail($this->userId, $orderId);
            return $orderId;
        } else {
            return false;
        }
    }
}

function generateOrderId() {
    // 生成唯一的订单号
}

function saveOrder($userId, $dishIds, $reservationTime, $quantity, $orderId) {
    // 保存订单到数据库
}

function sendConfirmationEmail($userId, $orderId) {
    // 发送确认邮件
}
?>

<?php
// 使用缓存优化菜品推荐
function getCachedRecommendedDishes($userId) {
    $cacheKey = 'recommended_dishes_' . $userId;
    $cachedData = getCache($cacheKey);
    if ($cachedData) {
        return $cachedData;
    } else {
        $recommendedDishes = recommendDishes($userId);
        setCache($cacheKey, $recommendedDishes, 3600); // 缓存1小时
        return $recommendedDishes;
    }
}

function getCache($key) {
    // 从缓存系统中获取数据
}

function setCache($key, $data, $expiration) {
    // 设置缓存数据
}
?>