Classes in arrays?

Hello when im trying to put a class in an array (for an chest refill plugin) why i couldnt put classes in my array?

example:

PHP:

§this->chest = [new item(1, 0, 1)]

?

Yes you can or you can try using something like "spl_object"

PHP:

private $chests = array();
$this->chests[] = new SomeClass();

Yes you can.

PHP:

$this->chest = [new Item(1, 0, 1)];

Remember to put use pocketmine\item\Item at the front; and 0 and 1 are the default parameters in parameters 2 and 3 of Item constructor, which you can omit if they are 0 and 1.

What? The only function that starts with spl_object is spl_object_hash(), and it has nothing to do with this thread.