pocketmine\Server::getPlayerExact PHP Method

    public function getPlayerExact($name)
    {
        $name = strtolower($name);
        foreach ($this->getOnlinePlayers() as $player) {
            if (strtolower($player->getName()) === $name) {
                return $player;
            }
        }
        return null;
    }

 /**
  * @param int $id
  * @param int $damage
  * @param int $count
  * @param bool $removeInv
  *
  * @return bool
  */
 public function addItem($id, $damage, $count, $removeInv = true)
 {
     if ($removeInv === true) {
         $p = $this->server->getPlayerExact($this->player);
         if (!$p instanceof Player) {
             return false;
         }
         $tmp = $count;
         foreach ($p->getInventory()->getContents() as $slot => $content) {
             if ($content->getID() == $id and $content->getDamage() == $damage) {
                 if ($tmp <= 0) {
                     break;
                 }
                 $take = min($content->getCount(), $tmp);
                 $tmp -= $take;
                 $content->setCount($content->getCount() - $take);
                 $p->getInventory()->setItem($slot, $content);
             }
         }
     }
     if (isset($this->items[$id . ":" . $damage])) {
         $this->items[$id . ":" . $damage] += $count;
     } else {
         $this->items[$id . ":" . $damage] = $count;
     }
     return true;
 }