gistfile1.php

    public function getMobileDeviceType()
    {
        //get the detector
        $detect = new \Detection\MobileDetect();

        $type = false;
        if ($detect->isMobile()) {
            $type = "phone";
            if ($detect->isTablet()) {
                $type = "tablet";
            }
        }

        //return phone

        return $type;
    }

    public function getConfig()
    {
        $config = array();
        $configFiles = array();

        if ($this->getMobileDeviceType() == 'phone') {
            $configFiles[] = __DIR__ . '/config/all.config.php';
            $configFiles[] = __DIR__ . '/config/phone.config.php';
        }
        if ($this->getMobileDeviceType() == 'tablet') {
            $configFiles[] = __DIR__ . '/config/all.config.php';
            $configFiles[] = __DIR__ . '/config/tablet.config.php';
        }

        foreach($configFiles as $configFile) {
            $config = \Zend\Stdlib\ArrayUtils::merge($config, include $configFile);
        }

        return $config;
    }