php 判断是否手机访问

$ua = strtolower($_SERVER['HTTP_USER_AGENT']);

$uachar = "/(nokia|sony|ericsson|mot|samsung|sgh|lg|philips|panasonic|alcatel|lenovo|cldc|midp|mobile)/i";

if(($ua == '' || preg_match($uachar, $ua))&& !strpos(strtolower($_SERVER['REQUEST_URI']),'wap'))

{

$Loaction = 'mobile/';

if (!empty($Loaction))

{

ecs_header("Location: $Loactionn");

exit;

}

}