跳转问题

<?php
header("Content-type: text/html; charset=utf-8");
$userAgent = $_SERVER['HTTP_USER_AGENT'];
if(strpos($userAgent,"iPhone") || strpos($userAgent,"iPad") || strpos($userAgent,"iPod")){
Header("HTTP/1.1 302 Moved Permanently");
Header("Location: http://ti.3g.qq.com/open/s?aid=clientjump&url=http://url.cn/dHeOrQ");
}else if(strpos($userAgent,"Android")){
Header("HTTP/1.1 302 Moved Permanently");
Header("Location: http://fusion.qq.com/app_download?appid=1103566659&platform=qzone&via=QZ.MOBILEDETAIL.QRCODE&u=262797544");
} else{
Header("HTTP/1.1 302 Moved Permanently");
Header("Location: http://ti.3g.qq.com/open/s?aid=clientjump&url=http://url.cn/d2KVkE");
}

?>