php 中判断请求来自 移动手机端，还是来自电脑 PC 端：

function checkmobile() {   
   $mobile = array();   
   static $mobilebrowser_list =array(‘iphone‘, ‘android‘, ‘phone‘, ‘mobile‘, ‘wap‘, ‘netfront‘, ‘java‘, ‘opera mobi‘, ‘opera mini‘,   
      ‘ucweb‘, ‘windows ce‘, ‘symbian‘, ‘series‘, ‘webos‘, ‘sony‘, ‘blackberry‘, ‘dopod‘, ‘nokia‘, ‘samsung‘,   
      ‘palmsource‘, ‘xda‘, ‘pieplus‘, ‘meizu‘, ‘midp‘, ‘cldc‘, ‘motorola‘, ‘foma‘, ‘docomo‘, ‘up.browser‘,   
      ‘up.link‘, ‘blazer‘, ‘helio‘, ‘hosin‘, ‘huawei‘, ‘novarra‘, ‘coolpad‘, ‘webos‘, ‘techfaith‘, ‘palmsource‘,   
      ‘alcatel‘, ‘amoi‘, ‘ktouch‘, ‘nexian‘, ‘ericsson‘, ‘philips‘, ‘sagem‘, ‘wellcom‘, ‘bunjalloo‘, ‘maui‘, ‘smartphone‘,   
      ‘iemobile‘, ‘spice‘, ‘bird‘, ‘zte-‘, ‘longcos‘, ‘pantech‘, ‘gionee‘, ‘portalmmm‘, ‘jig browser‘, ‘hiptop‘,   
      ‘benq‘, ‘haier‘, ‘^lct‘, ‘320x320‘, ‘240x320‘, ‘176x220‘);   
   $useragent = strtolower($_SERVER[‘HTTP_USER_AGENT‘]);   
   if( dstrpos($useragent, $mobilebrowser_list, true)) {    
      return true;   
   }   
   return false;
}   
     
function dstrpos($string, &$arr, $returnvalue = false) {   
      if(empty($string)) return false;   
      foreach((array)$arr as $v) {   
           if(strpos($string, $v) !== false) {   
               $return = $returnvalue ? $v : true;   
               return $return;   
           }   
      }   
      return false;   
 }