php如何获取一个域名不同地区的解析ip地址？

以下是几种获取域名在不同地区 DNS 解析 IP 的方法：

function getDnsRecords($domain) {
    $records = dns_get_record($domain, DNS_A + DNS_AAAA);
    $ips = [];

    foreach ($records as $record) {
        if (isset($record['ip'])) {
            $ips[] = $record['ip'];
        } elseif (isset($record['ipv6'])) {
            $ips[] = $record['ipv6'];
        }
    }

    return $ips;
}

function getIpFromDns($domain, $dnsServer) {
    $cmd = "dig @{$dnsServer} {$domain} +short";
    exec($cmd, $output, $return_var);
    return $output;
}

// 使用不同地区的 DNS 服务器
$dnsServers = [
    'us' => '8.8.8.8',        // Google DNS (美国)
    'cn' => '119.29.29.29',   // 腾讯 DNS (中国)
    'jp' => '1.1.1.1',        // Cloudflare DNS (亚太)
];

$results = [];
foreach ($dnsServers as $region => $server) {
    $results[$region] = getIpFromDns('example.com', $server);
}

function queryDns($domain, $dnsServer, $port = 53, $timeout = 3) {
    try {
        // 创建 UDP socket
        $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
        socket_set_option($sock, SOL_SOCKET, SO_RCVTIMEO, ['sec' => $timeout, 'usec' => 0]);

        // 构建 DNS 查询包
        $header = "\xAA\xAA\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00";
        $question = "";
        foreach (explode(".", $domain) as $part) {
            $question .= chr(strlen($part)) . $part;
        }
        $question .= "\x00\x00\x01\x00\x01";
        $query = $header . $question;

        // 发送查询
        socket_sendto($sock, $query, strlen($query), 0, $dnsServer, $port);

        // 接收响应
        $response = '';
        socket_recvfrom($sock, $response, 1024, 0, $from, $port);

        // 解析响应
        $ips = [];
        if (strlen($response) > 0) {
            // 简单解析响应中的 IP 地址
            $pos = s...

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