Get product type from product SKU
$product = Mage::getModel('catalog/product')->loadByAttribute('sku',$product_sku);
$productType = $product->getTypeId();
Display products data in cart
$items = Mage::getSingleton('checkout/session')->getQuote()->getAllItems();
foreach($items as $item) {
echo 'ID: '.$item->getProductId().'
';
echo 'Name: '.$item->getName().'
';
echo 'Sku: '.$item->getSku().'
';
echo 'Quantity: '.$item->getQty().'
';
echo 'Price: '.$item->getPrice().'
';
echo "
";
}
Get product stock quantity by sku
$sku = "AB123456789";
$_product = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);
$stock = Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product);
print_r($stock->getData());
echo $stock->getQty();
echo $stock->getMinQty();
echo $stock->getMinSaleQty();