石を10個取りあげる.php

<?php

$username = "Steve"; //対象プレイヤー名
$id = 1; //対象アイテムをIDで指定
$amount = 10; //個数

$player = $this->api->player->get($username);
foreach ($player->inventory as $slot => $item) {
    if ($item->getID() == $id) {
        while ($item->count >= 1 and $amount >= 1) {
            --$item->count;
            --$amount;
        }
        //追加のひと手間
        if ($item->count < 1) {
            $player->inventory[$slot] = new AirBlock();
        }
        //ここまで
        if ($amount < 1) {
            break;
        }
    }
}
$player->sendInventorySlot();