php判断手机还是电脑访问网站的代码

随着现在智能手机的普及，使用手机上网的用户数量可以说是剧增。为此很多人都开始重视手机网站建设，但是用户访问网站如何让手机用户自动加载手机版却成了大家关心的问题，最简单的方法是百度siteapp提供的跳转代码。这里为大家提供了在开发阶段直接使用php实现终端判断的方法。

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 0){
            $flag = true;
            break;
        }
    }
    return $flag;
}

if(check_wap()){
    echo "wap";
}else{
echo "web";
}