whoisnz.php

<?php
/**
 * Basic WHOIS query script for exipry date
 */

// feed domain via script, or GET request
$domain = (PHP_SAPI == 'cli') ? $argv[1] : $_GET['domain'];

// exit if no domain is provided
if (!$domain) {
    exit('No domain');
}

// only NZ domains
$nz = substr($domain, -3, 3);
if ($nz !== '.nz') {
    exit('Domain is not an NZ TLD');
}


// return date
echo Whois::queryExpiry($domain);


/**********  DO NOT EDIT BELOW THIS LINE  **********/

/**
 * Basic whois wrapper
 */
class Whois
{
    /**
     * Query Whois server via CLI -> Shell access is required
     *
     * @param  string $domain   Domain in question
     * @param  string $timezone PHP timezone -> http://php.net/manual/en/timezones.php
     * @param  string $format   Formatted date -> http://php.net/manual/en/function.date.php
     * @return string           Expiry time domain
     */
    public static function queryExpiry($domain, $timezone = 'Pacific/Auckland', $format = 'd/m/Y')
    {
        // CLI whois
        $whois = shell_exec(escapeshellcmd('whois ' . $domain));

        $lines = explode("\n", $whois);
        foreach ($lines as $val) {
            if (strpos($val, 'domain_datebilleduntil') !== false) {
                // save to DateTime -> Compensate for timezone
                $date = new DateTime(self::getString($val, ': '));
                break;
            }
        }

        // return expiry date in requested format/timezone
        $date->setTimezone(new DateTimeZone($timezone));
        return $date->format($format);
    }

    /**
     * Extract a substring between two tokens
     *
     * @param  string         $string String to search
     * @param  string         $start  Starting token
     * @param  boolean|string $end    End token. False = end of $search
     * @return string                 String between $start and $end
     */
    public static function getString($string, $start, $end = false)
    {
        if ((strpos($string, $start) === false)
            || ($end !== false && (strpos($string, $end) === false))
        ) {
            return false;
        }

        $start = strpos($string, $start) + strlen($start);

        return ($end)
            ? substr($string, $start, (strpos($string, $end, $start) - $start))
            : substr($string, $start);
    }
}