代码语言：php

所属分类：其他

代码描述：php+html实现随机小球点击人机验证前后端代码，小球每隔几秒更换位置，有三次机会，三次错误后要等半个小时，数据统计加密传输。

代码标签： php html 随机 小球 点击 人机 验证 前 后端 代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<?php
// PHP 5.6 Compatible Version - FINAL FIX

// --- START: Configuration ---
define('RATE_LIMIT_FILE', dirname(__FILE__) . '/rate_limit_logs.json');
define('MAX_FAILURES', 3);
define('BLOCK_MINUTES', 30);
// --- END: Configuration ---

if (session_status() == PHP_SESSION_NONE) {
    session_start();
}

function get_ip_address() {
    if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { return explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'])[0]; }
    return isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : 'unknown';
}

function check_rate_limit_status($ip) {
    $now = time();
    $fp = @fopen(RATE_LIMIT_FILE, 'r');
    if (!$fp) return array('is_blocked' => false, 'message' => '');
    flock($fp, LOCK_SH);
    $raw_data = stream_get_contents($fp);
    flock($fp, LOCK_UN);
    fclose($fp);
    $ip_data = empty($raw_data) ? array() : json_decode($raw_data, true);
    $record = isset($ip_data[$ip]) ? $ip_data[$ip] : array('block_until' => 0);
    if ($record['block_until'] > $now) {
        $remaining = ceil(($record['block_until'] - $now) / 60);
        return array('is_blocked' => true, 'message' => "尝试次数过多，请在 {$remaining} 分钟后重试。");
    }
    return array('is_blocked' => false, 'message' => '');
}

function record_failure_and_get_status($ip) {
    $now = time();
    $fp = fopen(RATE_LIMIT_FILE, 'c+');
    if (!$fp || !flock($fp, LOCK_EX)) {
        if ($fp) fclose($fp);
        return array('is_blocked' => false, 'message' => '无法写入日志');
    }
    $raw_data = stream_get_contents($fp);
    $ip_data = empty($raw_data) ? array() : json_decode($raw_data, true);
    $record = isset($ip_data[$ip]) ? $ip_data[$ip] : array('failures' => 0, 'block_until' => 0);
    if (isset($record['block_until']) && $record['block_until'] > 0 && $record['block_until'] < $now) {
        $record['failures'] = 0;
    }
    $record['failures'] = isset($record['failures']) ? $record['failures'] + 1 : 1;
    $message = ''; $is_blocked = false;
    if ($record['failures'] >= MAX_FAILURES) {
        $record['block_until'] = $now + (BLOCK_MINUTES * 60);
        $remaining = BLOCK_MINUTES;
        $message = "尝试次数过多，请在 {$remaining} 分钟后重试。";
        $is_blocked = true;
    }
    $ip_data[$ip] = $record;
    ftruncate($fp, 0); rewind($fp);
    fwrite($fp, json_encode($ip_data));
    flock($fp, LOCK_UN); fclose($fp);
    return array('is_blocked' => $is_blocked, 'message' => $message);
}

function handle_verification_request($user_ip) {
    $fail = .........完整代码请登录后点击上方下载按钮下载查看

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