function update($data)
{
global $wpdb;
$version = wpdb::escape($data['version']);
$reason = wpdb::escape($data['reason']);
$hits = intval($data['hits']);
$created_at = date('Y-m-d H:i:s', mktime(0, 0, 0, intval($data['month']), intval($data['day']), intval($data['year'])));
$wpdb->query("UPDATE {$wpdb->prefix}drainhole_version SET version='{$version}', hits='{$hits}', created_at='{$created_at}', reason='{$reason}' WHERE id='{$this->id}'");
}