php 获取顶级域名

function getTopLevelDomain($url) {
    $parsedUrl = parse_url($url);
    if (!isset($parsedUrl['host'])) {
        return null;
    }
    $hostParts = explode('.', $parsedUrl['host']);
    $tld = '.' . end($hostParts);
    return $tld;
}

$url = "https://www.example.com/path";
echo getTopLevelDomain($url); // 输出: .com

function getTopLevelDomainByIp($ip) {
    $host = gethostbyaddr($ip);
    if (!$host) {
        return null;
    }
    $hostParts = explode('.', $host);
    $tld = '.' . end($hostParts);
    return $tld;
}

$ip = "93.184.216.34"; // example.com 的 IP 地址
echo getTopLevelDomainByIp($ip); // 输出: .com

require 'vendor/autoload.php';

use TldExtract\Extract;

$extract = new Extract();
$result = $extract->parse('http://www.example.co.uk/path');

echo $result->getTld(); // 输出: co.uk