判断访问者是pc端还是移动端

    function getBrowserType(){
        $is_mobile = false;
        $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'); 
        $is_mobile = false;
        foreach ($mobile_os_list as $key=>$value) {
            if(strpos($_SERVER['HTTP_USER_AGENT'],$value)!==false){
                $is_mobile = true;
            }
        }
        foreach ($mobile_token_list as $key=>$value) {
            if(strpos($_SERVER['HTTP_USER_AGENT'],$value)!==false){
                $is_mobile = true;
            }
        }
        return  $is_mobile;
    }
　　//返回值 true是移动端，false是pc端