function check_wap() {

    if (isset($_SERVER['HTTP_VIA'])) return true;

    if (isset($_SERVER['HTTP_X_NOKIA_CONNECTION_MODE'])) return true;

    if (isset($_SERVER['HTTP_X_UP_CALLING_LINE_ID'])) return true;

    if (strpos(strtoupper($_SERVER['HTTP_ACCEPT']),"VND.WAP.WML") > 0) {

        // Check whether the browser/gateway says it accepts WML.

        $br = "WML";

    } else {

        $browser = isset($_SERVER['HTTP_USER_AGENT']) ? trim($_SERVER['HTTP_USER_AGENT']) : '';

        if(empty($browser)) return true;

        $mobile_os_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');  

        $mobile_token_list=array('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');  

        $found_mobile=checkSubstrs($mobile_os_list,$browser) ||

                  checkSubstrs($mobile_token_list,$browser);

    if($found_mobile)

      $br ="WML";

    else $br = "WWW";

    }

    if($br == "WML") {

        return true;

    } else {

        return false;

    }

}

function checkSubstrs($list,$str){

  $flag = false;

  for($i=0;$i<count($list);$i++){

    if(strpos($str,$list[$i]) > 0){

      $flag = true;

      break;

    }

  }

  return $flag;

}

//    if(check_wap()){

//              手机端

//        }else{

//              pc端

//      }