Plugin have problem

Hi,can anyone help me?My plugin got problem.But im new at coding.So idk whats wrong i did

PHP:

<?php

namespace CubeTopia\WorldUI

use pocketmine\Server;
use pocketmine\Player;

use pocketmine\plugin\PluginBase;

use pocketmine\command\Command;
use pocketmine\command\CommandSender;

use pocketmine\event\Listener;

class Main extends PluginBase implements Listener {


    public function onEnable () {
        @mkdir($this->getDataFolder());
    $this->getServer()->getPluginManage()->registerEvent($this, $this);
    }
    
    public function onCommand(CommandSender $sender, string $labwl, array $args) :bool
        switch($cmd->getName()){
            case "world"
                if($sender instance of Player){
                    $this->openMyForm($sender);
                }
            break;
        }
        
        return true;
    }
    
    public function openMyWorldForm $player){
    
    
        $api = $this->getServer()->getPluginManager()->getPlugin("FormAPI");
        
        $form = $api->createCustomForm(function(Player $player, array $data =null){
            
            if($data === null){
                return true;
            }
            
            $player->sendMessage("Entering World§b " . $data[1] "§r...")
        });
        
        $form->setTitle("§eCube§l§aT§r§eopia");
        $form->addLabel("§l§6» §r§7Please Enter the Name of World that you want to join or create");
        
        $form->addInput("§l§8»§fWorld Name:", "START");
        
        $form->sendToPlayer($player);
        
        return $form;
      
    }
    
}

 

Its Its line 5 got problem

 

Any please help,thank you!

 

You forgot a semicolon here (";")

 

Thx,theres actually more error.But i fixed all,Thank you.