Save a random player name from a specific map into a array.

I'm really confused with this, I'm trying to do a gamemode, but I get constantly errors.
Right now I use:

PHP:

    public $player = [];

    public function setBeast($game)
    {
        $server = $this->getServer();
        $players = $server->getLevelByName($game)->getPlayers();
        $this->beast[$game] = strtolower($players[array_rand($players)]->getName());
    }

    public function getBeast($game)
    {
        return $this->beast[$game];
    }


But, when I try to check if player is the random selected player I get errors telling me that the array is undefined :/
Example:

PHP:

public function onPvP(EntityDamageEvent $eventPvP)
    {
        if ($eventPvP instanceof EntityDamageByEntityEvent) {
            $entity = $eventPvP->getEntity();
            $damager = $eventPvP->getDamager();
            $games = ["RB-1", "RB-2", "RB-3", "RB-4", "RB-5", "RB-6", "RB-7", "RB-8", "RB-9", "RB-10"];
            if ($entity instanceof Player && $damager instanceof Player) {
                if ($eventPvP->getEntity()->getLevel()->getName() == "ZeSpawn") {
                    $eventPvP->setCancelled(true);
                }
                else{
                foreach ($games as $game) {
                    if (strtolower($entity->getName()) != $this->beast[$game] and strtolower($damager->getName()) != $this->beast[$game] or $this->pvpEnabled[$game] == false) {
                        $eventPvP->setCancelled(true);
                    }
                }
                }
            }
        }
    }

Also in my timer! - Large file in 3...2...1

Spoiler

PHP:

class TimerTask extends PluginTask{
    public function __construct(Main $plugin, $game){
        $this->plugin = $plugin;
        $this->game = $game;
        parent::__construct($plugin);
    }
    public function onRun($tick){
        $this->plugin->gameSec[$this->game] -= 1;
        $level = $this->plugin->getServer()->getLevelByName($this->game);
        $players = $level->getPlayers();
        if($this->plugin->gameSec[$this->game] <= 410 and $this->plugin->gameSec[$this->game] >= 396){
            foreach($players as $p){
                $seconds = $this->plugin->gameSec[$this->game] - 395;
                $p->sendPopup(TextFormat::WHITE . TextFormat::BOLD . "Game will start in " . $seconds);
            }
        }
        elseif($this->plugin->gameSec[$this->game] <= 394 and $this->plugin->gameSec[$this->game] >= 380){
            foreach($players as $p){
                $seconds = $this->plugin->gameSec[$this->game] - 379;
                $p->sendPopup(TextFormat::WHITE . TextFormat::BOLD . "Beast will be free in " . $seconds);
            }
        }
        elseif($this->plugin->gameSec[$this->game] == 390){
            $this->plugin->setBeast($this->game);
        }
        elseif($this->plugin->gameSec[$this->game] <= 378){
            foreach($players as $p){
                $p->sendPopup("Game will end in " . $this->plugin->gameSec[$this->game] . " seconds");
            }
        }
        switch($this->plugin->gameSec[$this->game]){
            case 395:
                foreach($players as $p) {
                    $p->sendTip("Game started");
                    $this->plugin->pvpEnabled[$this->game] = true;
                    if ($this->plugin->getBeast($this->game) == strtolower($p->getName())) {
                        $p->teleport(new Position($this->plugin->beastPosition[0],$this->plugin->beastPosition[1],$this->plugin->beastPosition[2],$this->plugin->getServer()->getLevelByName($this->game)));
                        $this->plugin->addKit($p);
                    }
                    else{
                        $p->teleport(new Position($this->plugin->startPointPosition[0], $this->plugin->startPointPosition[1], $this->plugin->startPointPosition[2], $this->plugin->getServer()->getLevelByName($this->game)));
                    }
                }
                break;
            case 379:
                foreach($players as $p){
                    $p->sendMessage(TextFormat::BOLD . TextFormat::WHITE . $this->plugin->beast[$this->game] . " was selected as beast!");
                    $this->plugin->addKit($this->plugin->beast[$this->game]);
                    $p->sendTip("Beast is free");
                    if(strtolower($p->getName()) == $this->plugin->getBeast($this->game)){
                        $p->teleport(new Position($this->plugin->startPointPosition[0], $this->plugin->startPointPosition[1], $this->plugin->startPointPosition[2],$this->plugin->getServer()->getLevelByName($this->game)));
                    }
                }
                break;
            case 0:
                $this->plugin->getServer()->broadcastMessage(TextFormat::WHITE . TextFormat::BOLD . "Runners won the game " . $this->game);
                foreach($players as $p){
                    $p->teleport($this->plugin->getServer()->getDefaultLevel()->getSafeSpawn());
                }
                $this->plugin->stopGame($this->game);
            break;
        }

    }
}

I don't what happen, any player get teleported to the start point, and I think the *big* problem is the array. If you see another problem, only tell me, please!

Wich errors? (Post crash logs)

To save a random player's name into an array,

PHP:

// Level $level
$players = [];
$lp = $level->getPlayers();
$rand = $lp[rand(0, count($lp) - 1)]->getName();
$players[$rand] = $rand;


Always, try doing a var_dump() on the array if you have its elements undefined.
Or did you mean the whole array rather than the specific element to be undefined?

That was the first method that I use, and I get the same error :')

That method only works when hour array is ordered linearly, i.e. with array keys incrementing starting from 0.