function detectMobileDevice( $screenWidth )
        {
#-k     cookie html device
#-       return 0 = bot
#-              1       user agent clear indication
#-              2       SERVER WAP
#-              3       SERVER WAP
#-              4       SERVER PROFILE
#-              5       user agent clear indication
#-              6       small screen width
#-              7       user agent matched mobile type
#-d     9/20/14 - updated

        $user_agent = strtolower ( $_SERVER['HTTP_USER_AGENT'] );
        $mobile_ua = substr($user_agent, 0, 4);
        $mobile_agents = array(
                'w3c ','acs-','alav','alca','amoi','audi','avan','benq','bird','blac',
                'blaz','brew','cell','cldc','cmd-','dang','doco','eric','hipt','inno',
                'ipaq','java','jigs','kddi','keji','leno','lg-c','lg-d','lg-g','lge-',
                'maui','maxo','midp','mits','mmef','mobi','mot-','moto','mwbp','nec-',
                'newt','noki','palm','pana','pant','phil','play','port','prox',
                'qwap','sage','sams','sany','sch-','sec-','send','seri','sgh-','shar',
                'sie-','siem','smal','smar','sony','sph-','symb','t-mo','teli','tim-',
                'tosh','tsm-','upg1','upsi','vk-v','voda','wap-','wapa','wapi','wapp',
                'wapr','webc','winw','xda ','xda-');

        if (detectRequester('bot'))
                { return 0; }

        if (detectRequester('mobile'))
                { return 7; }

        if (preg_match('/(up.browser|up.link|mmp|symbian|smartphone|midp|wap|phone|ipad|android)/i',
                $user_agent))
                { return 1; }   #

        if (strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml') > 0)
                { return 2; }

        if (isset($_SERVER['HTTP_X_WAP_PROFILE']))
                { return 3; }

        if (isset($_SERVER['HTTP_PROFILE']))
                { return 4; }

        if (in_array($mobile_ua,$mobile_agents))
                { return 5; }

        if ($screenWidth < 600)
                { return 6; }

        return 0;
        }

?>