最近，客户要求网站要判断是手机访问还是电脑访问，然后显示不同的信息，所以就在网上找了，这个，不是原创，重在分享。
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m.php100.com';
else
    echo '电脑登录www.php100.com';
?>
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