Update Customer Group Price

Update Customer Group Price

<?php

// USAGE http://www.site.com/dev/updategroupprice.php?price=14.95&sku=ABC152X

require_once '../app/Mage.php';
umask(0);
//Mage::app('admin');
Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);

$sku = $_GET['sku'];
$id = $_GET['id'];
$price = $_GET['price'];

// get my product 
$product = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);  
// the group data is expecting an array of arrays that look like.. 
// array ('website_id'=>y, 'cust_group'=>z, 'price'=>n)
$groupPricingData = array (
  // for website 2, customer group 2
  array ('website_id'=>2, 'cust_group'=>2, 'price'=>$price),

);
$product->setData('group_price',$groupPricingData);
$product->save();
echo $sku." wholesale price has been updated to ". $price;


?>