How do I find out if product has a product image?

To get the image src in a template file the following code is used:

$this->helper('catalog/image')->init($_product, 'small_image')->resize(200,100);

But how开发者_JAVA技巧 can I find out if there is an image associated with the product or if the placeholder image will be used?

(Magento v. 1.4.2)

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Placeholder is always used if product dosen't have image.

You can check those methods:

$product->getSmallImage();
$product->getThumbnail();
$product->getImage();

If product has image those moethod will return path.

Or you can check this method

$product->getMediaGalleryImages();

UPDATE 14.10.2011

no_selection is set when you check in BO > Product Edit Page > Images 'No image' chackbox

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Best solution is:

if($_product->getImage() && $_product->getImage() != 'no_selection'){//do}