1.第一种方法 

<?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";

}

?>

 2.第二种方法

 

<?php

function isMobile(){  

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

    $useragent_commentsblock=preg_match('|\(.*?\)|',$useragent,$matches)>0?$matches[0]:'';        

    function CheckSubstrs($substrs,$text){  

        foreach($substrs as $substr)  

            if(false!==strpos($text,$substr)){  

                return true;  

            }  

            return 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');  

          

    $found_mobile=CheckSubstrs($mobile_os_list,$useragent_commentsblock) ||  

              CheckSubstrs($mobile_token_list,$useragent);  

          

    if ($found_mobile){  

        return true;  

    }else{  

        return false;  

    }  

}

if (isMobile())

    echo '手机登录';

else

    echo '电脑登录';

?>