php 挡住刷流量

// 示例代码：IP访问频率限制
$ip = $_SERVER['REMOTE_ADDR'];
$key = 'access:' . $ip;
$current = strtotime("now");
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

$current_time = $redis->get($key);
if ($current_time != false && ($current - $current_time) < 60) {
    die("Too many requests");
} else {
    if ($redis->incr($key) === 1) {
        $redis->expire($key, 60);
    }
}

// 示例代码：使用Google reCAPTCHA
require_once 'vendor/autoload.php';

$recaptcha = new \ReCaptcha\ReCaptcha('YOUR_SECRET_KEY');
$resp = $recaptcha->verify($_POST['g-recaptcha-response'], $_SERVER['REMOTE_ADDR']);

if (!$resp->isSuccess()) {
    die("Please complete the captcha");
}

// 示例代码：简单的用户行为分析
$user_actions = [
    'ip' => $_SERVER['REMOTE_ADDR'],
    'timestamp' => time(),
    'action' => $_SERVER['REQUEST_URI']
];

// 存储用户行为数据到数据库或缓存

// 示例代码：API密钥验证
$api_key = $_GET['api_key'];
if ($api_key !== 'YOUR_API_KEY') {
    die("Invalid API key");
}