pocketmine\Server::getProperty PHP Method

    public function getProperty($variable, $defaultValue = null)
    {
        if (!array_key_exists($variable, $this->propertyCache)) {
            $v = getopt("", ["{$variable}::"]);
            if (isset($v[$variable])) {
                $this->propertyCache[$variable] = $v[$variable];
            } else {
                $this->propertyCache[$variable] = $this->config->getNested($variable);
            }
        }
        return $this->propertyCache[$variable] === null ? $defaultValue : $this->propertyCache[$variable];
    }

 public function __construct(Server $server, $timeout = 5)
 {
     $this->timeout = $timeout;
     $this->serverName = $server->getMotd();
     $this->listPlugins = $server->getProperty("settings.query-plugins", true);
     $this->plugins = $server->getPluginManager()->getPlugins();
     $this->players = [];
     foreach ($server->getOnlinePlayers() as $player) {
         if ($player->isOnline()) {
             $this->players[] = $player;
         }
     }
     if ($server->isDServerEnabled() and $server->dserverConfig["queryMaxPlayers"]) {
         $pc = $server->dserverConfig["queryMaxPlayers"];
     } elseif ($server->isDServerEnabled() and $server->dserverConfig["queryAllPlayers"]) {
         $pc = $server->getDServerMaxPlayers();
     } else {
         $pc = $server->getMaxPlayers();
     }
     if ($server->isDServerEnabled() and $server->dserverConfig["queryPlayers"]) {
         $poc = $server->getDServerOnlinePlayers();
     } else {
         $poc = count($this->players);
     }
     $this->gametype = ($server->getGamemode() & 0x1) === 0 ? "SMP" : "CMP";
     $this->version = $server->getVersion();
     $this->server_engine = $server->getName() . " " . $server->getPocketMineVersion();
     $this->map = $server->getDefaultLevel() === null ? "unknown" : $server->getDefaultLevel()->getName();
     $this->numPlayers = $poc;
     $this->maxPlayers = $pc;
     $this->whitelist = $server->hasWhitelist() ? "on" : "off";
     $this->port = $server->getPort();
     $this->ip = $server->getIp();
 }