<?php

require './vendor/autoload.php';

use Detection\MobileDetect;
$detect = new MobileDetect();

if (false !== strpos($_SERVER['HTTP_REFERER'],  'https://www.google.com/')) {
    if ($detect->isMobile()) {
        echo 'Including mobile version';
    } else {
        echo 'Carrying on...';
    }
}