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;   
 }