Mediagallery images not corresponding with Sku images

Question

I'm trying to get all the the different kind of product images from the Media-gallery (see code below). Product with the black-11 SKU is my black-product but it doesn't show that product image. What is wrong with the code. I noticed this with all the product so maybe it's a sorting problem or initiating

<?php
require '../app/Mage.php';
Mage::app("default");

$gallery_images = Mage::getModel('catalog/product')->load('black-11')->getMediaGalleryImages();

$items = array();

foreach($gallery_images as $g_image) {
  echo "URL: " . $g_image['url'] . "<br/>";
}
?>

Answer 1

the load method accepts numeric ID's only. Try the following

Mage::getModel('catalog/product')->load('black-11', 'sku')[....]

or

$productId = Mage::getModel('catalog/product')->getIdBySku('black-11');
Mage::getModel('catalog/product')->load($productId)[....]

Answer 2

This is wrong with your code ->load('black-11').
The load method takes as parameter the PK of the entity you are trying to retrieve.
Use ->load('black-11', 'sku') instead.

Answer 3

As far as I know:

->load() expects an ID while you using an SKU.

So please try:

->loadbysku('your-sku') or ->loadbyattribute('sku','your-sku')