从 IP 获取主机名

Question

我需要从我的 ip 地址中提取主机名。我试过这个：

echo shell_exec('nslookup ' . $iper->Get_Ip())["Server"];

基本上它会导出我需要的所有内容，但我无法访问主机 IP。 它看起来像这样：

Server:     xxxxx
Address:    xxxxx

Non-authoritative answer:
xxxxxxxa    name = xxxxxx

Authoritative answers can be found from:
xx.in-addr.arpa nameserver = sec3.apnic.net.
xx.in-addr.arpa nameserver = ns3.lacnic.net.
xx.in-addr.arpa nameserver = tinnie.arin.net.
xx.in-addr.arpa nameserver = sns-pb.isc.org.
xx.in-addr.arpa nameserver = ns3.afrinic.net.
xx.in-addr.arpa nameserver = pri.authdns.ripe.net.
pri.authdns.ripe.net    internet address = xxxx
sec3.apnic.net  internet address = xxxxxxxx
sns-pb.isc.org  internet address = xxxxxx
tinnie.arin.net internet address = xxxx
pri.authdns.ripe.net    has AAAA address xxxx
sec3.apnic.net  has AAAA address xxxx
sns-pb.isc.org  has AAAA address xxxx
tinnie.arin.net has AAAA address xxxx

有没有更好的方法来获取主机，或者我不得不用这种方式来解决问题，并尝试以某种方式提取主机 ip.... 谢谢

Answer 1

这是答案，我能找到从 ip 获取主机的唯一方法是：

$data = (shell_exec('nslookup ' . $ip_adress));

下面是返回主机 ip 的工作代码：

$iper = new IpEr();
$ip_adress = $iper->Get_Ip();

    $data = (shell_exec('nslookup ' . $ip_adress));
    $data = (explode("\n",$data));
    $data = explode(":",$data[0]);
    echo trim($data[1]);

如果有人需要，这里是 iper 类：

<?php

class IpEr{
  public function Get_Ip(){
    if(!empty($_SERVER['HTTP_CLIENT_IP'])){
      $ip=$_SERVER['HTTP_CLIENT_IP'];
    }
    elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
      $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
    }
    else{
      $ip=$_SERVER['REMOTE_ADDR'];
    }
    return  $ip;
  }
}

?>

Answer 2

PHP 有一个内置函数，gethostbyaddr()。

<?php

class IpEr{
  public function Get_Ip(){
    if(!empty($_SERVER['HTTP_CLIENT_IP'])){
      $ip=$_SERVER['HTTP_CLIENT_IP'];
    }
    elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
      $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
    }
    else{
      $ip=$_SERVER['REMOTE_ADDR'];
    }
    return  $ip;
  }
}

$iper = new IpEr();
$ip_adress = $iper->Get_Ip();

echo gethostbyaddr($ip_adress);

?>

此外，作为一般规则，使用shell_exec 和exec 不是一个好主意，因为它会引入潜在的安全漏洞