I18n::getInstance PHP Method

    public static function getInstance()
    {
        static $instance = array();
        if (!$instance) {
            $instance[0] = new I18n();
        }
        return $instance[0];
    }

 /**
  * Creates a new local user in the application data base.
  * 
  * @param WebSoccer $websoccer Application context.
  * @param DbConnection $db DB Connection.
  * @param string $nick User name of new user. Optional if e-mail address is provided. Must be unique in local data base. Case sensitive.
  * @param string $email E-mail address of new user. Optional if nick is provided. Must be unique in local data base. Case insensitive (will be stored with lower letters).
  * @throws Exception if both nick and e-mail are blank, or if nick name or e-mail address is already in use. Messages are not internationalized. Method assumes appropriate checks before calling it.
  * @return int ID of newly created user.
  */
 public static function createLocalUser(WebSoccer $websoccer, DbConnection $db, $nick = null, $email = null)
 {
     $username = trim($nick);
     $emailAddress = strtolower(trim($email));
     // check if either nick or e-mail is provided. If not, it most probably is a wrong API call,
     // hence message is not required to be translated.
     if (!strlen($username) && !strlen($emailAddress)) {
         throw new Exception("UsersDataService::createBlankUser(): Either user name or e-mail must be provided in order to create a new internal user.");
     }
     // verify that there is not already such a user. If so, the calling function is wrongly implemented, hence
     // no translation of message.
     if (strlen($username) && self::getUserIdByNick($websoccer, $db, $username) > 0) {
         throw new Exception("Nick name is already in use.");
     }
     if (strlen($emailAddress) && self::getUserIdByEmail($websoccer, $db, $emailAddress) > 0) {
         throw new Exception("E-Mail address is already in use.");
     }
     // creates user.
     $i18n = I18n::getInstance($websoccer->getConfig("supported_languages"));
     $columns = array("nick" => $username, "email" => $emailAddress, "status" => "1", "datum_anmeldung" => $websoccer->getNowAsTimestamp(), "lang" => $i18n->getCurrentLanguage());
     if ($websoccer->getConfig("premium_initial_credit")) {
         $columns["premium_balance"] = $websoccer->getConfig("premium_initial_credit");
     }
     $db->queryInsert($columns, $websoccer->getConfig("db_prefix") . "_user");
     // provide ID of created user.
     if (strlen($username)) {
         $userId = self::getUserIdByNick($websoccer, $db, $username);
     } else {
         $userId = self::getUserIdByEmail($websoccer, $db, $emailAddress);
     }
     // trigger plug-ins
     $event = new UserRegisteredEvent($websoccer, $db, I18n::getInstance($websoccer->getConfig("supported_languages")), $userId, $username, $emailAddress);
     PluginMediator::dispatchEvent($event);
     return $userId;
 }