English * 本页设置 $_SESSION['lang'] + cookie 后，重定向回来源页（或首页）。 */ require __DIR__ . '/includes/init.php'; $lang = trim($_GET['lang'] ?? ''); $allowed = []; foreach (Lang::available() as $l) { $allowed[] = $l['code']; } if ($lang !== '' && in_array($lang, $allowed, true)) { $_SESSION['lang'] = $lang; setcookie('fnw_lang', $lang, time() + 31536000, '/'); Lang::setLocale($lang); } // 重定向回来源页，避免跳转到站外 $ref = $_SERVER['HTTP_REFERER'] ?? ''; $host = parse_url((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? 'https://' : 'http://') . ($_SERVER['HTTP_HOST'] ?? ''), PHP_URL_HOST); if ($ref === '' || parse_url($ref, PHP_URL_HOST) !== $host) { $ref = '/'; } header('Location: ' . $ref, true, 302); exit;