servnest/fn/reg.php

<?php

define('SUBDOMAIN_REGEX', '^[a-z0-9]{4,63}$');

function regListUserDomains($username) {
	return query('select', 'registry', ['username' => $username], 'domain');
}

function regCheckDomainPossession($domain) {
	if (in_array($domain, regListUserDomains($_SESSION['username']), true) !== true)
		output(403, 'You don\'t own this domain.');
}

function regDeleteDomain($domain) {
	// Delete domain from registry file
	$regFile = file_get_contents(CONF['reg']['registry_file']);
	if ($regFile === false)
		output(500, 'Failed to read current registry File.');
	$regFile = preg_replace('/^(?:[a-z0-9._-]+\.)' . preg_quote($domain, '/') . '[\t ]+.+$/Dm', '', $regFile);
	if (file_put_contents(CONF['reg']['registry_file'], $regFile) === false)
		output(500, 'Failed to write new registry file.');

	// Delete from Niver's database
	query('delete', 'registry', [
		'domain' => $domain,
		'username' => $_SESSION['username'],
	]);
}