how-to

1 - download the project
2 - create a php file (e.g: foo.php)
3 - put this code sample:

require_once "ismobile.class.php";

$ismobi = new IsMobile();

if($ismobi->CheckMobile()) {
    echo 'Your mobile device is a ' . $ismobi->GetMobileDevice() . '? ';
}
else {
    echo "It isn't a mobile device...";
}

4 - ..and go drink a beer