How to get item/product counts in cart?

$_cart = Mage::getModel('checkout/cart');

echo"getItemsQty-" . ($_cart->getItemsQty());

echo"getItemsCount-" . ($_cart->getItemsCount());

echo"getSummaryQty-" . ($_cart->getSummaryQty());

Source : http://www.codefight.org/