Help my first plugin

Plzz editi code for me.

Main.php

Code:

<?php

namespace Flsmers;

use pocketmine\plugin\PluginBase;
use pocketmine\item\Item;
use pocketmine\Player;
use pocketmine\utils\Config;
use oocketmine\inventory\Inventory;
use pocketminr\command\ConsoleCommandSender;
use pocketmine\command\CommandSender;
use pocketmine\command\Command;

class Main extends PluginBase{
    public function onEnable(){
        }
        $this->getLogger()->info("Zadania zaladowane");
        }

  public function onCommand(CommandSender $sender, Command $command, $label, array $args){   
            if(strtolower($command->getName('cobblex'))) {
                if(empty($args)) {
                    $sender->sendMessage("");
                    $sender->sendMessage("• §9>> §aZdobądz 64 cobblestona §9>> §a/skyblock 1");
                    $sender->sendMessage("• §9>> §aZdobądz 32 złota §9>> §a/skyblock 2");
                    $sender->sendMessage("• §9>> §aZdobądz 32 żelaza §9>> §a/skyblock 3");
                    $sender->sendMessage("• §9>> §aZdobądz 64 diamenty §9>> §a/skyblock 4");
                    $sender->sendMessage("• §9>> §cWięcej zadań wkrótce :)");
                    return true;
                }
            if($args[0] == "kup") {
        }else{
      if($sender->getInventory()->contains(Item::get(4, 0, 64))){
            $sender->getInventory()->addItem(Item::get(388, 0, 1));
            $sender->sendMessage("§a • Kupiłeś cobblex • ");
            }
            else{
              $sender->sendMessage("§c • Nie masz cobblestone'a • ");
              }
           }
          return true;
            }
        }
    }
}

plugin.yml

Code:

name: CobblexKup
main: Flsmers\Main
version: 1.0.0
api: 2.0.0
commands:
cobblex:
  description: "Kupno cobblex"
  permission: "cobblex.cobblexkup"
  default: true

Thanks

What an error you have?

PHP:

class Main extends PluginBase{
public function onEnable(){
}
$this->getLogger()->info("Zadania zaladowane");
}

I have narrowed down where the mistake may be at. Try to find it yourself.

I saw where is the mistake

PHP:

<?php

namespace Flsmers;

use pocketmine\plugin\PluginBase;
use pocketmine\item\Item;
use pocketmine\Player;
use pocketmine\utils\Config;
use oocketmine\inventory\Inventory;
use pocketminr\command\ConsoleCommandSender;
use pocketmine\command\CommandSender;
use pocketmine\command\Command;
use pocketmine\event\Listener;

class Main extends PluginBase implements Listener{
    public function onEnable(){
        }
        $this->getLogger()->info("Zadania zaladowane");
        $this->getServer()->getPluginManager()->registerEvents($this, $this);
        }

  public function onCommand(CommandSender $sender, Command $command, $label, array $args){  
            if(strtolower($command->getName('cobblex'))) {
                if(empty($args)) {
                    $sender->sendMessage("");
                    $sender->sendMessage("• §9>> §aZdobądz 64 cobblestona §9>> §a/skyblock 1");
                    $sender->sendMessage("• §9>> §aZdobądz 32 złota §9>> §a/skyblock 2");
                    $sender->sendMessage("• §9>> §aZdobądz 32 żelaza §9>> §a/skyblock 3");
                    $sender->sendMessage("• §9>> §aZdobądz 64 diamenty §9>> §a/skyblock 4");
                    $sender->sendMessage("• §9>> §cWięcej zadań wkrótce :)");
                    return true;
                }
            if($args[0] == "kup") {
        }else{
      if($sender->getInventory()->contains(Item::get(4, 0, 64))){
            $sender->getInventory()->addItem(Item::get(388, 0, 1));
            $sender->sendMessage("§a • Kupiłeś cobblex • ");
            }
            else{
              $sender->sendMessage("§c • Nie masz cobblestone'a • ");
              }
           }
          return true;
            }
        }
    }
}
I dont know wether it is right but I've registered the events and implements the Listener

One main problem you have is the OnEnable

here is a corrected one.

PHP:

class Main extends PluginBase implements Listener{
    public function onEnable(){
        $this->getLogger()->info("Zadania zaladowane");
        $this->getServer()->getPluginManager()->registerEvents($this, $this);
        }


The last "}" for the "class Main extends PluginBase implements Listener{" goes at the bottom of the whole code
Ill correct the rest soon

Your bold tags are wrong...

Why would you even implement unnecessary Listener?

I havent added it. I simply corrected where the "{" / "}" tags go

You implemented Listener alright...

Quotes to help you

You should look at the original code, not the one suggested by someone else.

I understand what you mean, but the person who suggested it was also wrong. So I have the right to correct that person.
Dont you agree?

Hey! Hope its not too late to point out that little typos make a big diference too.

use oocketmine\inventory\Inventory;

Look in BOLD for the error

oocketmine is the typo. Its supposed to be pocketmine