如果用户浏览到子域，PHP将重定向到移动版本

Question

Scenario: I have a website set up with a php 'Mobile Detect' function. If a mobile device IS detected OR version=mobile (which sets a cookie), they are shown (via php) the mobile version of the page. If a mobile device is NOT detected, OR if the version=full (which sets a cookie), they are shown (via php) the Full version of the site. This all takes place on example.com of my domain.

I want to allow users to force the mobile version of the site (in case they have previously set the version Cookie) if they visit m.example.com.

Is there a way to redirect m.example.com to www.example.com AND set the version=mobile ? I tried doing this with my DNS settings, using a URL redirect from the 'm' subdomain to www.example.com/index.php?version=mobile which DOES work for the URL, however when the page is shown, even though the ?version=mobile is in the URL, my PHP 'Mobile Detect' does not pick up on this, and still renders the Full version of the page.

EDIT :: FYI I am on a Linux Server.

Answer 1

This is the php code, it is more efficiently if you use htaccess for this

$iphone = strpos($_SERVER['HTTP_USER_AGENT'],"iPhone");
$android = strpos($_SERVER['HTTP_USER_AGENT'],"Android");
$palmpre = strpos($_SERVER['HTTP_USER_AGENT'],"webOS");
$berry = strpos($_SERVER['HTTP_USER_AGENT'],"BlackBerry");
$ipod = strpos($_SERVER['HTTP_USER_AGENT'],"iPod");

if ($iphone || $android || $palmpre || $ipod || $berry == true) 
{ 
   echo "<script>window.location='http://m.site.com'</script>";
}