Chest

I want to edit specific Chests at specific coordinates so like:

PHP:

$inv = ($x, $y, $z);
$inv->addItem(1);


http://forums.pocketmine.net/threads/set-chest-block-and-fill-with-items.12227/

PHP:

// you have position for a chest $x $y $z and the world name $world
// $main points to a PluginBase instance, which should be $this if you are in the main class
$level = $main->getServer()->getLevelByName($world);
$tile = $level->getTile(new Vector3($x, $y, $z));
if($tile instanceof \pocketmine\tile\Chest){
  $inventory = $tile->getInventory();
  $inventory->addItem(Item::get(1));
}

Also keep in mind that Inventory::addItem() accepts variadic parameters of Item, which means that you can pass any amount of parameters into it but they must all be instances of Item; you must not pass an integer.