用PHP判断客户端是否是手机

 <?php
 function isMobile(){
     $useragent = isset($_SERVER['HTTP_USER_AGENT'])? $_SERVER['HTTP_USER_AGENT']: '';
     $mobile_list = array('Google Wireless Transcoder','Windows CE','WindowsCE',
         'Symbian', 'Android','armv6l','armv5','Mobile','CentOS','mowser',
         'AvantGo','Opera Mobi','J2ME/MIDP',
         'Smartphone','Go.Web','Palm','iPAQ',
         'Profile/MIDP', 'Configuration/CLDC-',
         '160×160','176×220','240×240','240×320','320×240',
         'UP.Browser','UP.Link','SymbianOS','PalmOS','PocketPC','SonyEricsson',
         'Nokia','BlackBerry','Vodafone',
         'BenQ','Novarra-Vision','Iris','NetFront','HTC_','Xda_','SAMSUNG-SGH',
         'Wapaka','DoCoMo','iPhone','iPod'
     );
     foreach($mobile_list as $keyword){
         if(false !== strpos($useragent, $keyword)){
             return true;
         }
     }
     return false;
 }
 echo isMobile()? 'mobile': 'pc';