Мобильный телефон или компьютер

<?php
function detect_mobile_device(){
if (stristr(@$_SERVER['HTTP_USER_AGENT'],'windows')&&!stristr(@$_SERVER['HTTP_USER_AGENT'],'windows ce')) return false;

if (eregi('up.browser|up. link |windows ce|iemobile|mini|mmp|symbian|midp|wap|phone|pocket|mobile|pda|psp',@$_SERVER['HTTP_USER_AGENT'])) return true;

 if (isset($_SERVER['HTTP_ACCEPT'])&&(stristr($_SERVER['HTTP_ACCEPT'],'text/vnd.wap.wml')||stristr($_SERVER['HTTP_ACCEPT'],'application/vnd.wap.xhtml xml'))) return true;

if (isset($_SERVER['HTTP_X_WAP_PROFILE'])|| isset($_SERVER['HTTP_PROFILE'] )|| isset($_SERVER['X-OperaMini-Features'])|| isset($_SERVER['UA-pixels'])) return true;
$a = array ('acs-','alav','alca','amoi','audi','aste','avan','benq','bird','blac','bla z','brew','cell','cldc','cmd-','dang','doco','eric','hipt','inno','ipaq','java', 'jigs','kddi','keji','leno','lg-c','lg-d','lg-g','lge-','maui','maxo','midp','mi ts','mmef','mobi','mot-','moto','mwbp','nec-','newt','noki','opwv','palm','pana' ,'pant','pdxg','phil','play','pluc','port','prox','qtek','qwap','sage','sams','s any','sch-','sec-','send','seri','sgh-','shar','sie-','siem','smal','smar','sony ','sph-','symb','t-mo','teli','tim-','tosh','tsm-','upg1','upsi','vk-v','voda',' w3c ','wap-','wapa','wapi','wapp','wapr','webc','winw','winw','xda','xda-');
if (isset($a[ substr (@$_SERVER['HTTP_USER_AGENT'],0,4)])) return true;
}

if (detect_mobile_device())echo "Вы зашли с мобильного телефона!";
else echo "Вы зашли с компьютера ";
?>