有没有办法用PHP模拟'whois'工具？

$domain = 'example.com';
$whois_output = shell_exec("whois $domain");
echo $whois_output;

$domain = 'example.com';
$whois_server = 'whois.verisign-grs.com';
$port = 43;

$socket = fsockopen($whois_server, $port);
if (!$socket) {
    echo "Error: Unable to connect to $whois_server on port $port\n";
    exit;
}

fputs($socket, "$domain\r\n");

$whois_output = '';
while (!feof($socket)) {
    $whois_output .= fgets($socket, 128);
}

fclose($socket);

echo $whois_output;

composer require jeremykendall/php-whois

require_once 'vendor/autoload.php';

use JeremyKendall\Whois\Whois;

$domain = 'example.com';
$whois = new Whois();
$result = $whois->loadDomain($domain);

echo $result->getResponse();