Magento How to check if the shopping cart is empty or not?

I think this could help:

http://blog.decryptweb.com/empty-cart-magento/

You can try something like this:

$checkout_cart = Mage::getSingleton('checkout/cart');
$items = $checkout_cart->getItems();

You can try this.

$cart_qty = (int) Mage::getModel('checkout/cart')->getQuote()->getItemsQty();

if($cart_qty) {
    // Not empty.
} else {
    // Empty.
}

I was able to find the total count of items in the shopping cart using the following code:

$totalItemsInCart = Mage::helper('checkout/cart')->getItemsCount();

If it does not work, let me know.