Update products programmatically in Magento

Question

I\'m working on a script that will create or update products in my catalog.
The script works fine when the product needs to be created, but it fails when the product alr

Answer 1

//here what i use in codeigniter
function updateProducts(){
    $params = array('name' => 'adminhtml'); // frontend or adminhtml
    $this->load->library('magento', $params);
    error_reporting(E_ALL | E_STRICT);
    //$mageFilename = 'app/Mage.php';
    //require_once $mageFilename;
    Mage::setIsDeveloperMode(true);
    umask(0);
    Mage::app();
    Mage::app()->setCurrentStore(Mage::getModel('core/store')->load(Mage_Core_Model_App::ADMIN_STORE_ID));      
    $obj = new stdClass(); 
    $obj->Sku = '25484684';
    $obj->Name = 'test product 2';
    $obj->SalePrice = 55;
    $obj->LongDescription = 'test product long decription.test product long decription.test product long decription.';
    $obj->Description = 'short descrption';
    $res = $this->updateMagentoProduct($obj);
    //dumb($res);
}
function updateMagentoProduct($XMLproduct){
    $SKU = (string)$XMLproduct->Sku;
    $product = Mage::getModel('catalog/product')->loadByAttribute('sku',$SKU);
    if (!$product) {//insert new product
        $product = Mage::getModel('catalog/product');
        $product->setSku($SKU);
    }       
    //$product = new Mage_Catalog_Model_Product();
    // Build the product
    $product->setAttributeSetId(4); // 4 means Default AttributeSet
    $product->setTypeId('simple');
    $product->setName((string)$XMLproduct->Name);
    $product->setCategoryIds(array(2,3,4,5,6,7));
    $product->setWebsiteIDs(array(1)); # Website id, 1 is default 
       //$product->setWebsiteIds(array(Mage::app()->getStore(true)->getWebsite()->getId()));
    //$product->setWebsiteIDs(array(1)); # Website id, my is 1 (default frontend)
    $product->setDescription((string)$XMLproduct->LongDescription);
    $product->setShortDescription((string)$XMLproduct->Description);
    $product->setPrice((real)$XMLproduct->SalePrice);
    # Custom created and assigned attributes
    //$product->setHeight('my_custom_attribute1_val');
    //$product->setWidth('my_custom_attribute2_val');
    //$product->setDepth('my_custom_attribute3_val');
    //$product->setType('my_custom_attribute4_val');
    //Default Magento attribute
    $product->setWeight(1.0);
        $product->setVisibility(Mage_Catalog_Model_Product_Visibility::VISIBILITY_BOTH);
    $product->setStatus(1);
    $product->setTaxClassId(0); # My default tax class
    /*$product->setStockData(array(
        'is_in_stock' => 1,
        'qty' => 99999
    ));*/
    $product->setCreatedAt(strtotime('now'));
    try {

        $product->save();
        $productId = $product->getId();
        $stockItem =Mage::getModel('cataloginventory/stock_item')->loadByProduct($productId);
        $stockItemId = $stockItem->getId();

        $stockItem->setData('manage_stock', 1);
        $stockItem->setData('qty', 99999);//(integer)$XMLproduct->QtyInStock

        $stockItem->save();



        echo '
'.$SKU," Updated: Name: '",(string)$XMLproduct->Name,"', Price: ",(real)$XMLproduct->SalePrice,", Stock level: ",PHP_EOL.'
';
    }
    catch (Exception $ex) {
        //Handle the error
        echo '
'.$ex->getMessage().'
';
    }
    // assign product to the default website        
    return $product->save();
}