Core::checkIsInstalled PHP Method

    public static function checkIsInstalled()
    {
        if (!self::$settingsFileExists) {
            return false;
        }
        // attempt to make the connection
        Core::initDatabase();
        $installationComplete = Settings::getSetting("installationComplete");
        if (!isset($installationComplete) || $installationComplete == "no") {
            return false;
        }
        return true;
    }

 function __construct()
 {
     if (!Core::checkIsInstalled()) {
         return;
     }
     $this->dbLink = Core::$db->getDBLink();
     $this->dbPrefix = Core::getDbTablePrefix();
     // register this object as the session handler
     session_set_save_handler(array(&$this, "open"), array(&$this, "close"), array(&$this, "read"), array(&$this, "write"), array(&$this, "destroy"), array(&$this, "gc"));
 }