How can PHP be used to connect to a Whois service for domain verification?

To connect to a Whois service for domain verification using PHP, you can use the `fsockopen` function to establish a connection to the Whois server, send a query for the domain information, and then read the response from the server. You can parse the response to extract the relevant domain information for verification. 

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

$socket = fsockopen($whois_server, $port);
if ($socket) {
    fwrite($socket, $domain . "\r\n");
    $response = '';
    while (!feof($socket)) {
        $response .= fgets($socket, 128);
    }
    fclose($socket);

    // Parse $response to extract domain information for verification
    echo $response;
} else {
    echo 'Unable to connect to Whois server';
}

Keywords

PHP Whois service domain verification API cURL

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