How to Find WHOIS Information for a Domain in PHP

The below code will allow you to quickly return a full WHOIS record (including registration details, domain owner info, etc.) for any input domain name — including a validation check to ensure the domain exists in the first place.

Just run the following command to install the client SDK:

composer require cloudmersive/cloudmersive_validate_api_client

Then copy & paste from the code examples below to structure your API call:

<?php
require_once(__DIR__ . '/vendor/autoload.php');

// Configure API key authorization: Apikey
$config = Swagger\Client\Configuration::getDefaultConfiguration()->setApiKey('Apikey', 'YOUR_API_KEY');



$apiInstance = new Swagger\Client\Api\DomainApi(
    
    
    new GuzzleHttp\Client(),
    $config
);
$domain = "domain_example"; // string | Domain name to check, for example \"cloudmersive.com\".   The input is a string so be sure to enclose it in double-quotes.

try {
    $result = $apiInstance->domainPost($domain);
    print_r($result);
} catch (Exception $e) {
    echo 'Exception when calling DomainApi->domainPost: ', $e->getMessage(), PHP_EOL;
}
?>

To authenticate each request for free, register a free account on the Cloudmersive website — this will provide you with a free-tier API key & a limit of 800 API calls per month (there are zero commitments once you reach that limit; you can upgrade to an enterprise any time if need be).

That’s all there is to it — now you have an easy WHOIS domain service you can count on.