请求接口的客户端类型判断

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$userAgent = $_SERVER['HTTP_USER_AGENT'];
if (preg_match("/(iPod|iPad|iPhone)/", $userAgent))
{
    $type =  1; //IOS客户端
}
elseif (preg_match("/WP/", $userAgent))
{
    $type =  2; //WinPhone客户端
}
elseif (preg_match("/android/i", $userAgent)) {
    $type =  3; //android客户端
}