Can anyone help me?

I am working on a plugin but I don't know is it right,

Code:

<?php

namespace Text{

use pocketmine\plugin\PluginBase;
use pocketmine\Command;
use pocketmine\command\CommandSender;
use pocketmine\event\Listener;
use pocketmine\Player;
use pocketmine\level\position;

    class Text extends PluginBase {
   
    public function onEnable(){
      $this->getLogger()->info("onEneble() has been called!");
    }
    public function onDisable() {
      $this->getLogger()->info("onDisable() has been called!"); 
    }    }
   
    public function onCommand(CommandSender $sender, Command $command, $label, array $args){
        switch($command->getName(text)){
            case "text":
                            .->addParticle(new FloatingTextParticle (new Vector3($player->getX(), $player->getY(), $player->getZ()), "§1Hello §aWorld§l!"), [$player])
                                $sender->sendMessage("§1Finish §3lord§l!")
                                }}}

Why `.->addParticle()`?

What?
look here :https://github.com/Cecil107/plug-ins/tree/master/H-Text

You're working on a Plugin? That's just copying..

No

No what? You just copied the code from the GitHub.

I am Cecil107 this is my pc username

Lol, well change it to to $player->getLevel()->addParticle

Is it make text ?

Yes
use $sender->getLevel()->addParticle
you cant just add particle without defining the world