Phpprobid hide add to card button when stock level is 0

I want to hide 'Add to card'/'Buy' button when stock item is 0, i found the way how to disable (below I add code 'disabled' => ($listing['quantity'] > 0 || $listing->getData('stock_levels')) ?false : 'disabled',) but I need to hide that button. I need help to write html code and hide that button. Code is: <?php $purchaseBtnValue =($listing->canAddToCart() === true) ? $this->_('Add to Card'): $this->_('Buy Out'); echo $this->formElement('button', 'buy') ->setType('submit') ->setAttributes(array( 'class' => 'btn btn-success', 'formaction' => $this->url($listing->purchaseLink()), 'disabled' => ($listing->isActiveAndOpen() && !$seller->isVacation()) ? false : 'disabled', 'disabled' => ($listing['quantity'] > 0 || $listing->getData('stock_levels')) ?false : 'disabled', )) ->setValue($purchaseBtnValue) ->render(); ?> </dd>