WordPress 使用 CDN 后获取访客真实 IP

// WordPress 使用 CDN 后获取访客真实 IP
if( !empty($_SERVER['HTTP_X_FORWARDED_FOR']) ) {
    $get_HTTP_X_FORWARDED_FOR = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
    $_SERVER['REMOTE_ADDR'] = trim($get_HTTP_X_FORWARDED_FOR[0]);
}