servnest/fn/reg.php

<?php

function regGetUpperDomain($domain) {
	// Remove anything before the first dot and the first dot itself
	return preg_replace("/^[^.]+\./", "", $domain);
}

function regListUserDomains($username) {
	$db = new PDO('sqlite:' . DB_PATH);
	$usernameArray[0] = $username;

	$op = $db->prepare('SELECT domain FROM registry WHERE username = ?');
	$op->execute($usernameArray);

	$domains = array();
	foreach ($op->fetchAll() as $domain)
		array_push($domains, $domain['domain']);

	return $domains;
}

function regCheckDomainPossession($domain) {
	checkAbsoluteDomainFormat($domain);

	$ownedDomains = regListUserDomains($_SESSION['username']);

	if (in_array($domain, $ownedDomains, true) !== true)
		userError("You don't own this domain.");
}

function regIsFree($domain) {

	$domainArray[0] = $domain;

	$db = new PDO('sqlite:' . DB_PATH);

	$req = $db->prepare('SELECT domain FROM registry WHERE domain = ?');
	$req->execute($domainArray);

	$data = $req->fetch();

	if (isset($data['domain'])) {
		return false;
	} else {
		return true;
	}

}