
<?php
require_once '../app/bootstrap.php';
$bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $_SERVER);
$app = $bootstrap->createApplication(\Magento\Framework\App\Http::class);
$obj = $bootstrap->getObjectManager();

$state = $obj->get('\Magento\Framework\App\State');
$state->setAreaCode('global');

$productObject = $obj->get('Magento\Catalog\Model\Product');
$product = $productObject->loadByAttribute("sku","WSA-WSP-1Y-S1");

echo $product->getUpdatedAt()."\n";
echo strtotime($product->getUpdatedAt());