How to insert products programmatically in Magento

<?php
 
header('Content-Type: text/html; charset=utf-8');
 
require 'app/Mage.php';
 
if (!Mage::isInstalled()) {
    echo "Application is not installed yet, please complete install wizard first.";
    exit;
}
 
// Only for urls
// Don't remove this
$_SERVER['SCRIPT_NAME'] = str_replace(basename(__FILE__), 'index.php', $_SERVER['SCRIPT_NAME']);
$_SERVER['SCRIPT_FILENAME'] = str_replace(basename(__FILE__), 'index.php', $_SERVER['SCRIPT_FILENAME']);
 
Mage::app('admin')->setUseSessionInUrl(false);
 
umask(0);
 
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));
 
 
 
 
if ($_FILES["file"]["error"] > 0)
  {
  echo "Error: " . $_FILES["file"]["error"] . "<br>";
  }
else
  {
  echo "<p>File Name: " . $_FILES["file"]["name"] . "<br>";
  echo "File Type: " . $_FILES["file"]["type"] . "<br>";
  echo "File Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
  echo "File temporary folder: " . $_FILES["file"]["tmp_name"]."</p>";
 
    if (file_exists("uploads/" . $_FILES["file"]["name"]))
      {
      echo "<strong> '".$_FILES["file"]["name"] . "' already exists. </strong>";
	  $f = "uploads/" . $_FILES["file"]["name"];
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"],
      "uploads/" . $_FILES["file"]["name"]);
	  echo "Stored in: " . "uploads/" . $_FILES["file"]["name"];
	  $f = "uploads/" . $_FILES["file"]["name"];
      }
 
  echo "<br><br>";
 
  }
 
/**
 * @link http://gist.github.com/385876
 */
function csv_to_array($filename='', $delimiter=',')
{
    if(!file_exists($filename) || !is_readable($filename)) 
        //return FALSE;
		echo 'return False'; 
 
 
    $header = NULL;
    $data = array();
    if (($handle = fopen($filename, 'r')) !== FALSE)
    {
        while (($row = fgetcsv($handle, 1000, $delimiter)) !== FALSE)
        {
            if(!$header) {
                $header = $row;
             } else {
                echo $row[1].' '; echo count($header); echo '-'; echo count($row); echo '<br>'; 
				$data[] = array_combine($header, $row);
				}				
        }
        fclose($handle);
    }
    return $data;
}
 
 
 
 
 
 
$arr = csv_to_array($f);
 
foreach ($arr as &$a) {
 
	print '<strong>- - - '.mb_convert_encoding($a['SKU'], "UTF-8").' - - -</strong>';
 
 
newSimpleProduct($a['SKU'],  mb_convert_encoding($a['Product Name'],"UTF-8"),$a['Reseller Net Price'], $a['Net Price'], $a['Tax'] ,$a['Inhoud'], $a['file picture'] , $a['Category'] ,  $a['Short description']);
 
 
}
 
 
// required for product attributes
function trim_value(&$value) { $value = trim($value); }
 
 
function newSimpleProduct($sku, $name, $reseller_net_price, $net_price , $tax ,$inhoud, $img , $category  , $short_description) {
 
 
// Tax 
if ($tax == '0,06') 
{ $taxvalue = 5; }   // 5 is the option value of 6% BTW NL in the backend
else  if ($tax == '0,21')
{ $taxvalue = 6; }  // 6 = 21% BTW NL is the option value of 6% BTW NL in the backend
else { $taxvalue = 0; } // # 0 = default tax class // needed for simple products --- 2 =taxable goods kai 4 shiping products 
 
 //get category model
$category_model = Mage::getModel('catalog/category')->loadByAttribute('name',$category); 
$catid = $category_model->getId(); //get category id
 
 
 
$product = new Mage_Catalog_Model_Product(); 
 
 
if(!$product->getIdBySku($sku)) {
 
 
 
// Build the product 
$product->setSku($sku);
 
$product->setName($name); 
 
$product->setTaxClassId($taxvalue); // # 0 = default tax class // needed for simple products --- 2 =taxable goods kai 4 shiping products 
 
$product->setAttributeSetId('4');# 9 is for default 

$product->setTypeId('simple'); 
//$product->setCategoryIds(array(42)); # some cat id's, 
$product->setCategoryIds($catid); # gets the category from the name  

$product->setWebsiteIDs(array(1)); # Website id, 1 is default  

$product->setShortDescription( $short_description); // NEEDED for products short description
 
$product->setPrice($net_price); # Set some price

$product->setinhoud($inhoud);
 
// for simple: VISIBILITY_NOT_VISIBLE, bundle: VISIBILITY_BOTH
$product->setVisibility(Mage_Catalog_Model_Product_Visibility::VISIBILITY_BOTH);  
 
$product->setStatus(1); 
 
 
$product->setStockData(array( 
'is_in_stock' => 1, 
'qty' => 99999
)); 
 
 $im_url_path = Mage::getBaseUrl('media').'images/'.$img.'.JPG'; 
     $im_absolute_path = Mage::getBaseDir('media') . DS . 'dnhproductimages/'.$img.'.JPG'; 
 echo $im_absolute_path;
       $product->setMediaGallery (array('images'=>array (), 'values'=>array ())); 
       // setStoreID(0) is Default Value
	      $product->setStoreId(0)->addImageToMediaGallery($im_absolute_path, array ('image','small_image','thumbnail'), false, false); // line 4
// end img 
 
$product->setCreatedAt(strtotime('now')); 
 
// Reseller Group PRICE ////
$product->setData('group_price',array (
    array (
        "website_id" => 0,  // 0 for All websites -  1 is Main Web site Id
		"cust_group" => 4, // 4 are Resellers id in the backend
        "price" => $reseller_net_price    // price in Euros
    )));
 
	try { 
	$product->save(); 
 
	} 
	catch (exception $e) { 
	//Handle the error 
			echo "<div>".$e."</div>";		
	} 
	} else {
 
	print '<div style="color:red;">';
	print 'SKU "'.$sku.'" already exists, stored with ID-number: "'.$product->getIdBySku($sku) ;
	print '"</div>';
 
	}
}
 
?>