Magento 1.9: Google Tag Manager code add in header But active Only on Product Detail Page

Question

I want to add the script in the head.phtml but i need the product's id, SKU. So i only want it to work when is on the product Detail page.

Answer 1

I have found the solution:

$_product = Mage::registry("current_product")
    if ($_product && $_product->getId()) :
        //google tag code here
    endif;