Error when running /spawn

<?php

namespace JoinItem;

use pocketmine\plugin\PluginBase;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerJoinEvent;
use pocketmine\Player;
use pocketmine\Server;
use pocketmine\item\Item;
use pocketmine\command\Command;
use pocketmine\command\CommandSender;

class Main extends PluginBase implements Listener {

public function onEnable(){
$this->getLogger()->info("Successfully Enabled");
$this->getServer()->getPluginManager()->registerEvents($this, $this);
}

public function onDisable(){
$this->getLogger()->info("Successfully Disabled");
}

public function onJoin(PlayerJoinEvent $event){
$player = $event->getPlayer(); //Player = Get Player That Doing The Event (Join Server)
$player->getInventory()->clearAll();
$player->getInventory()->setItem(3, Item::get(280, 1, 1));
$player->getInventory()->setItem(5, Item::get(399, 1, 1));
}

public function onCommand(CommandSender $sender, Command $cmd, string $label, array $args) : bool{

if(strtolower($command->getName()) == "spawn"){
$sender->getInventory()->clearAll();
$sender->getInventory()->setItem(3, Item::get(280, 1, 1));
$sender->getInventory()->setItem(5, Item::get(399, 1, 1));
return true;
}
}
}



Not sure what is wrong with it please help

 

Undefined variable $command at 8th to last line. Also, don't use hardcoded item IDs...

 

```

 

thx it is fixed