I'm trying to write a script to add 10 products to Magento using php/mage.

This is what I have so far, in Magento 1.8.1

```
<?php
ini_set('memory_limit', '-1');
ini_set('display_errors', '1');
error_reporting(E_ALL);
require '../app/Mage.php';
$app = Mage::app('default');
set_time_limit(0);
$product = Mage::getModel('catalog/product');
$sku = 1;

do {
$product->setName(trim(strip_tags('Unnamed Product')));
$product->setDescription(trim(strip_tags('Description')));
$product->setShortDescription(trim(strip_tags('Short Description')));
$product->setSku($sku);
$product->setPrice(trim(strip_tags('19.99'))); # Set some price
$product->setWeight('1');
$product->setCreatedAt(strtotime('now'));
$product->setTypeId('simple');
$product->setTaxClassId(2); // taxable goods
$def_attribute_set = Mage::getModel('catalog/product')->getResource()->getEntityType()->getDefaultAttributeSetId();
$product->setAttributeSetId($def_attribute_set);
$stock_data=array(
'use_config_manage_stock' => 1,
'qty' => trim(strip_tags($data[13])),
'min_qty' => 0,
'use_config_min_qty'=>1,
'min_sale_qty' => 0,
'use_config_min_sale_qty'=>1,
'max_sale_qty' => 9999,
'use_config_max_sale_qty'=>1,
'is_qty_decimal' => 0,
'backorders' => 0,
'notify_stock_qty' => 1,
'is_in_stock' => 1
);
$product->setData('stock_data',$stock_data);
$product->setWebsiteIds(array(Mage::app()->getStore(true)->getWebsite()->getId()));
$product->setStatus(1);
$product->setVisibility(4);
$product->save();
$sku++;
} while ($sku<=10)

?>

```

I'm trying to tell it to add products, increment the sku by 1, and keep adding and incrementing till it gets to 10. However it only adds one product and then does nothing?

Is there a better way to programatically add products to magento and increment the sku? Also trying to figure out how to get Magento to check for the sku and skip it if it exists and have had zero luck with that as well.