Main.php

<?php

namespace MyFirstPlugin;

use pocketmine\plugin\PluginBase;
use pocketmine\command\Command;
use pocketmine\command\CommandSender;
use pocketmine\player\Player;

class Main extends PluginBase {
    public function onEnable(): void {
        $this->getLogger()->info("¡Hola, mundo! Mi primer plugin ha sido habilitado.");
    }

    public function onCommand(CommandSender $sender, Command $command, string $label, array $args): bool {
        if ($command->getName() === "hello") {
            if ($sender instanceof Player) {
                $sender->sendMessage("¡Hola, " . $sender->getName() . "!");
                return true;
            } else {
                $sender->sendMessage("Este comando solo puede ser usado en el juego.");
                return false;
            }
        }
        return false;
    }
}