How to get current currency and currency symbol in Magento

To get Current Currency

$currency_code = Mage::app()->getStore()->getCurrentCurrencyCode(); 

To get current currency symbol use:

Mage::app()->getLocale()->currency(Mage::app()->getStore()->getCurrentCurrencyCode())->getSymbol();

Block reference is empty in magento widget

Add the following code in your current theme "page.xml" file.

 Main Content Area

This helps to display widget content in your current theme product page.

magento check current page is category or product page

if(!Mage::registry('current_product')):
//Your text
endif;