php判断终端是手机还是电脑访问网站代码

?php 

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()){

	echo "wap";

}else{

echo "web";

}



?>