is it possible to add callback on event dispatching?

Question

Is it possible somehow to add callback on event in magento without registering observer in for it ? (like wordpress hooks works)

For example, add callback:

    FunctionToAddCallback('catalog_product_save_after', function(){ Mage::log('callback works'); });

and after

    Mage::dispatchEvent('catalog_product_save_after',array('product'=>$this));

It should log 'callback works'.

Is this possible or adding observer is the only way ?

Answer 1

Adding an observer is the only way.