<?php
class LikeCounter {
    private $redis;

    public function __construct() {
        $this->redis = new Redis();
        $this->redis->connect('127.0.0.1', 6379);
    }

    public function incrementLike($postId) {
        $key = "post_likes:$postId";
        return $this->redis->incr($key);
    }

    public function getLikeCount($postId) {
        $key = "post_likes:$postId";
        return $this->redis->get($key);
    }
}

// 示例用法
$likeCounter = new LikeCounter();
$postId = 123; // 假設(shè)這是某個(gè)帖子的ID

// 用戶對(duì)帖子點(diǎn)贊
$newCount = $likeCounter->incrementLike($postId);
echo "Post $postId has $newCount likes.";

// 獲取帖子點(diǎn)贊數(shù)
$currentLikes = $likeCounter->getLikeCount($postId);
echo "Current like count for post $postId: $currentLikes";

<?php
class RateLimiter {
    private $redis;
    private $maxRequests;
    private $timeWindow;

    public function __construct($maxRequests, $timeWindow) {
        $this->redis = new Redis();
        $this->redis->connect('127.0.0.1', 6379);
        $this->maxRequests = $maxRequests;
        $this->timeWindow = $timeWindow;
    }

    public function isAllowed($userId, $apiEndpoint) {
        $key = "rate_limit:$userId:$apiEndpoint";
        $count = $this->redis->incr($key);

        if ($count == 1) {
            // 設(shè)置過(guò)期時(shí)間
            $this->redis->expire($key, $this->timeWindow);
        }

        if ($count > $this->maxRequests) {
            // 超過(guò)最大請(qǐng)求次數(shù)
            return false;
        }

        return true;
    }
}

// 示例用法：每分鐘最多允許用戶訪問(wèn)API 10次
$rateLimiter = new RateLimiter(10, 60); // 10次請(qǐng)求，時(shí)間窗口60秒

$userId = 123; // 假設(shè)這是某個(gè)用戶的ID
$apiEndpoint = "/api/buy"; // API 端點(diǎn)

if ($rateLimiter->isAllowed($userId, $apiEndpoint)) {
    echo "Request allowed.";
    // 執(zhí)行API操作
} else {
    echo "Too many requests. Please try again later.";
    // 拒絕請(qǐng)求
}

<?php
class SmsRateLimiter {
    private $redis;
    private $maxSmsRequests;
    private $timeWindow;

    public function __construct($maxSmsRequests, $timeWindow) {
        $this->redis = new Redis();
        $this->redis->connect('127.0.0.1', 6379);
        $this->maxSmsRequests = $maxSmsRequests; // 最大允許的短信發(fā)送次數(shù)
        $this->timeWindow = $timeWindow; // 時(shí)間窗口（秒）
    }

    public function canSendSms($userId) {
        $key = "sms_limit:$userId";
        $count = $this->redis->incr($key);

        if ($count == 1) {
            // 第一次操作時(shí)，設(shè)置過(guò)期時(shí)間
            $this->redis->expire($key, $this->timeWindow);
        }

        if ($count > $this->maxSmsRequests) {
            // 超過(guò)最大允許的發(fā)送次數(shù)
            return false;
        }

        return true;
    }
}

// 示例用法：限制每個(gè)用戶每 60 秒最多發(fā)送 3 條短信
$smsLimiter = new SmsRateLimiter(3, 60); // 3次請(qǐng)求，時(shí)間窗口60秒

$userId = 123; // 假設(shè)這是某個(gè)用戶的ID

if ($smsLimiter->canSendSms($userId)) {
    echo "短信發(fā)送成功";
    // 調(diào)用發(fā)送短信的API
} else {
    echo "發(fā)送頻率過(guò)高，請(qǐng)稍后再試";
    // 拒絕發(fā)送短信
}