Q:

How do you detect a mobile device with PHP?

I'm looking for the best method/practice to use for detecting if a person is using a mobile device to view a website. I'd like to be able to adjust the templates of the website if a mobile device is detected so it's easier to view.
What is the most reliable and effective method for detecting mobile devices?

A:

You can use this project to do that:
if ($detect->isMobile()) {
    // Any mobile device.
}

A:

you can get the server agent and use a preg_match to check it.
for example:
$isMobile=(bool)preg_match("/(android|avantgo|blackberry|bolt|boost|cricket|docomo|fone|hiptop|mini|mobi|palm|phone|pie|tablet|up\.browser|up\.link|webos|wos)/i", $_SERVER["HTTP_USER_AGENT"]);

i got a better version of the code from here:
$isMobile = (bool)preg_match('#\b(ip(hone|od|ad)|android|opera m(ob|in)i|windows (phone|ce)|blackberry|tablet'.
                    '|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp|laystation portable)|nokia|fennec|htc[\-_]'.
                    '|mobile|up\.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\b#i', $_SERVER['HTTP_USER_AGENT'] );

and then you can :
if(isMobile())
    header("Location: http://m.site.com/");

A:

you could try the http://detectmobilebrowsers.com/ libraries. has a piece of code to detect mobile browsers for almost everything you would need to be able to detect mobile browsers.

