Init Magento environment for custom scripts

magento_env.php

// I want to see errors
error_reporting(E_ALL);
ini_set('display_errors', '1');
// Modify the PHP Environment
ini_set('memory_limit', '2048M');
// Load Up Magento Core
define('MAGENTO', realpath('..'));

require_once(MAGENTO . '/app/Mage.php');

Mage::setIsDeveloperMode(true);

Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);

function get_store_by_code($storeCode) {
    $stores = array_keys(Mage::app()->getStores());
    foreach($stores as $id){
        $store = Mage::app()->getStore($id);
        if($store->getCode()==$storeCode) {
            return $store;
        }
    }
    return false;
}