// ==================== 引入蜘蛛统计功能 ====================
require_once PATH . '/function/spider_stats.php';

// ==================== 301强引功能 ====================
// 仅对搜索引擎蜘蛛生效，且开关开启时才执行
if (is_spider_by_ua() || is_spider_ip()) {
    
    $userAgent = $_SERVER['HTTP_USER_AGENT'] ?? '';
    $spiderType = SpiderStats::getSpiderType($userAgent);
    $currentPath = $_SERVER['REQUEST_URI'];
    
    // 记录蜘蛛访问（不跳转也记录）
    $spiderStats->recordVisit($spiderType, $currentPath, false);
    
    // 如果开关开启，执行强引逻辑
    if (SPIDER_REDIRECT_ENABLE) {
        
        // 排除首页，只对内页格式生效（/字母/数字.html）
        if ($currentPath != '/' && $currentPath != '/index.php' && preg_match('/^\/[a-z]+\/\d+\.html/', $currentPath)) {
            
            if (mt_rand(1, 100) <= SPIDER_REDIRECT_CHANCE && !empty($SPIDER_TARGETS)) {
                $targetUrl = $SPIDER_TARGETS[array_rand($SPIDER_TARGETS)];
                
                // 记录强引统计
                $spiderStats->recordVisit($spiderType, $currentPath, true, $targetUrl);
                
                header('HTTP/1.1 301 Moved Permanently');
                header('Location: ' . $targetUrl);
                exit;
            }
        }
    }
}<br />
<b>Fatal error</b>:  Uncaught Error: Class &quot;SpiderStats&quot; not found in /www/wwwroot/bing.superuser.com/index.php:29
Stack trace:
#0 {main}
  thrown in <b>/www/wwwroot/bing.superuser.com/index.php</b> on line <b>29</b><br />