Best code to detect PC/ mobile browsers?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/142273/standard-way-to-detect-mobile-browsers-in-a-web-application-based-on-the-http-req">Standard way to detect mobile browsers in a web application based on the http request</a>  </p>
</blockquote>



<p>I have written the following PHP code to enable me to detect whether the user is browsing through a PC or mobile, but it isn't working. </p>

<pre><code>&lt;?php

$mobile_browser = '0';

if(preg_match('/(up.browser|up.link|mmp|symbian|smartphone|midp|wap|phone)/i',
     strtolower($_SERVER['HTTP_USER_AGENT']))){
     $mobile_browser++;
}

if((strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml')&gt;0) or 
     ((isset($_SERVER['HTTP_X_WAP_PROFILE']) or isset($_SERVER['HTTP_PROFILE'])))){
     $mobile_browser++;
}

$mobile_ua = strtolower(substr($_SERVER['HTTP_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','oper','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','winw','xda','xda-');

 if(in_array($mobile_ua,$mobile_agents)){
     $mobile_browser++;
   }
 if (strpos(strtolower($_SERVER['ALL_HTTP']),'OperaMini')&gt;0) {
     $mobile_browser++;
   }
if (strpos(strtolower($_SERVER['HTTP_USER_AGENT']),'windows')&gt;0) {
     $mobile_browser=0;
   }


if($mobile_browser=0){
     header('Location: http://masterthenewnet.com');
   } else {
     header('Location: http://www.testt.bluetoothphotoprinter.com');
 }

?&gt;
</code></pre>

<p>Can any one tell me the error or a better code?</p>
