Magento restore canceled orders

restore-canceled-orders-magento.php

<?php
require_once 'app/Mage.php';
Mage::app();

$order = Mage::getModel('sales/order')->load(258); // order_id (not increament id)
$order->setState(Mage_Sales_Model_Order::STATE_NEW);
$order->setStatus(Mage_Sales_Model_Order::STATE_NEW);
$order->save();

foreach ($order->getAllItems() as $item) {
    $item->setQtyCanceled(0);
    $item->save();
}