// Get cURL resource
    $curl = curl_init();
    // Set some options - we are passing in a useragent too here
    curl_setopt_array($curl, array(
        CURLOPT_RETURNTRANSFER => 1,
        CURLOPT_URL => 'https://www.nationalbackgrounddata.net/xmlgateway/affiliatelogin.do?affiliatecode=E3118&username=' . $username . '&password=' . $password . '&firstname=' . $first_name . '&lastname=' . $last_name . '&ssn=' . $ssn . '&state=' . $state . '&streetnumber=' . $streetnumber . '&streetname=' . $streetname . '&postalcode=' . $postalcode . '&municipality=' . $municipality . '&product=National RegistryCHECK&permissiblepurpose=' . $permissiblepurpose . '&version=' . $version . '&endusercode=' . $endusercode . '&enduserstate=' . $enduserstate,
        CURLOPT_USERAGENT => 'Codular Sample cURL Request'
    ));
    // Send the request & save response to $response
    $response = curl_exec($curl);
    // Close request to clear up some resources
    curl_close($curl);