i want player first time break oak = Send Massage

i want player first time pickup (PickUpevent) oak = Send Massage (use config)
How Can i Make It Any Developer Can Help Me?

 

PHP:

use pocketmine\event\inventory\InventoryPickupItemEvent;

public function onPickup(InventoryPickupItemEvent $e)
{
$item=$e->getItem();
$id=$item->getId();
if ($id===$oakid)
{
//yc
}
}


 

Make sure to define the $oakid lol

 

Oh, if it is first time then:

PHP:

use pocketmine\event\inventory\InventoryPickupItemEvent;
use pocketmine\event\player\PlayerLoginEvent;
public $config;
public function onLogin(PlayerLoginEvent $e)
{
$n=$e->getPlayer()->getName();
if(!$this->config->exists("oak$n"))
{
$this->config->set("oak$n","false");
$this->config->save();
}
}
public function onPickup(InventoryPickupItemEvent $e)
{
$p=$e->getPlayer();
$n=$e->getName();
$item=$e->getItem();
$id=$item->getId();
if ($id===17 && $this->config->get("oak$n")=="false")
{
$this->config->set("oak$n","true");
$this->getServer()->broadcastMessage("Player $n achieved 'First steps!' ");
$this->config->save();
}
}
public function onEnable()
{
if(!is_dir($this->getDataFolder())
{
mkdir($this->getDataFolder());
}
    $this->saveResource("config.yml");
    $this->config = new Config($this->getDataFolder() ."config.yml",Config::YAML);
}