php 解决扫描二维码下载跳转问题

$agent=strtolower($agent=strtolower(_SERVER['HTTP_USER_AGENT']); $iphone=(strpos(iphone=(strpos($agent, 'iphone')) ? true : false; $ipad=(strpos($ipad=(strpos($agent, 'ipad')) ? true : false; $android=(strpos(android=(strpos($agent, 'android')) ? true : false; if($iphone || $iphone || $ipad){　　echo "<script>window.location.href='https://itunes.apple.com/cn/app/wu-han-de-tie-gong-e/id663196252?mt=8'</script>";} if($android){　　echo "<script>window.location.href='http://www.vevb.com'</script>";}