/**
 * 判断是否是手机端
 * @return bool
 */
function isMobile() {
    $user_agent = $_SERVER['HTTP_USER_AGENT'];
    $pattern = "/(Android|webOS|iPhone|iPod|BlackBerry|IEMobile|Opera Mini|Harmony|Weixin)/i";
    if(preg_match($pattern, $user_agent)){
        return true;
    } else {
        return false;
    }
}

鸿蒙系统标识