php判断客户端是否为手机

<?php 
//php判断客户端是否为手机  
$agent = $_SERVER['HTTP_USER_AGENT']; 
if(strpos($agent,"NetFront") || strpos($agent,"iPhone") || strpos($agent,"MIDP-2.0") || strpos($agent,"Opera Mini") || strpos($agent,"UCWEB") || strpos($agent,"Android") || strpos($agent,"Windows CE") || strpos($agent,"SymbianOS")) 
header("Location:xxxxxxxx"); 
?> 

摘自 chaojie2009的专栏