限定地区的一些跳转代码

<?php


$urlA="http://www.baidu.com/register/";//这里是跳转的地址
$user_agent = $_SERVER['HTTP_USER_AGENT'];

//获取IP
if($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]){
    $ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
}elseif($HTTP_SERVER_VARS["HTTP_CLIENT_IP"]){
    $ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];
}elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"]){
    $ip = $HTTP_SERVER_VARS["REMOTE_ADDR"];
}elseif (getenv("HTTP_X_FORWARDED_FOR")){
    $ip = getenv("HTTP_X_FORWARDED_FOR");
}elseif (getenv("HTTP_CLIENT_IP")){
    $ip = getenv("HTTP_CLIENT_IP");
}elseif (getenv("REMOTE_ADDR")){
    $ip = getenv("REMOTE_ADDR");
}else{
    $ip = "Unknown";
}


//获取城市函数
function getCity($ip)
{
    $url="http://ip.taobao.com/service/getIpInfo.php?ip=".$ip;
    $ip=json_decode(file_get_contents($url));
    if((string)$ip->code=='1'){
      return false;
    }
    $data = (array)$ip->data;
    return $data;
}

 
$cityInfo=getCity($ip);
 
$area=$cityInfo['region'];
$city=$cityInfo['city'];
$noAreaAry=array('广东','上海','江苏');
$noCityAry=array('杭州','武汉');
 
//省不是广东上海江苏  并且城市不是杭州和武汉 并且是vivo的浏览器
if(!in_array($area,$noAreaAry) &&!in_array($city,$noCityAry)  && stripos($user_agent, "vivo")!==false) {
    header('Location:'.$urlA);
}