thinkphp获取当前浏览器的版本

        $user_agent = request()->header('user-agent');
        if (false !== stripos($user_agent, 'MSIE')) {
            $user_browser = 'MSIE';
        } elseif (false !== stripos($user_agent, 'Firefox')) {
            $user_browser = 'Firefox';
        } elseif (false !== stripos($user_agent, 'Chrome')) {
            $user_browser = 'Chrome';
        } elseif (false !== stripos($user_agent, 'Safari')) {
            $user_browser = 'Safari';
        } elseif (false !== stripos($user_agent, 'Opera')) {
            $user_browser = 'Opera';
        } else {
            $user_browser = 'Other';
        }
        return  $user_browser;