php实现扫描二维码根据浏览器类型访问不同下载地址

<"安卓";
header("Location: ".$GLOBALS["public_appconfig"]["app"]['android']."'");
} elseif (strtolower($matches[0]) == 'iphone') {
header("'Location: ".$GLOBALS["public_appconfig"]["app"]['ios']."'");
}else{
//不确定是什么系统或者是pc
header("Location: ".$GLOBALS["public_appconfig"]["app"]['android']."'");
}
?>