Get product changes

Question

Situation is:

Admin logs in to system and he changes product somehow.

For example:

Sets qty to 10 Adds 2 images Changes description

Is there any

Answer 1

You can find the unaltered data through an object's getOrigData() method. A good time to get the object is through it's save_before event, so create an observer for the catalog_product_save_before event. The observer might contain the following:

public function onCatalogProductSaveBefore($observer)
{
  $product = $observer->getProduct();
  if ($product->hasDataChanges()) {
    $newValues = array_diff_assoc($product->getData(), $product->getOrigData());
    $oldValues = array_diff_assoc($product->getOrigData(), $product->getData());
    $added     = array_diff_key($product->getData(), $product->getOrigData());
    $unset     = array_diff_key($product->getOrigData(), $product->getData());
  }
}

Note that $newValues will include all of $added and existing attributes that have had their value changed. Ditto for $oldValues and $unset.