Magento1 how to change magento order status programatically?

Some time we need to change the Order status programmatically , the below code will allow us to do this

 

$orderId = YOUR_ORDER_ID;
$order = Mage::getModel('sales/order')->load($orderId);

$orderIncrementId = YOUR_ORDER_INCREMENT_ID;
$order = Mage::getModel('sales/order')->loadByIncrementId($orderIncrementId);

/**
 * change order status to 'Completed'
 */
$order->setState(Mage_Sales_Model_Order::STATE_COMPLETE, true)->save();

/**
 * change order status to 'Pending'
 */
$order->setState(Mage_Sales_Model_Order::STATE_NEW, true)->save();

/**
 * change order status to 'Pending Paypal'
 */
$order->setState(Mage_Sales_Model_Order::STATE_PENDING_PAYMENT, true)->save();

/**
 * change order status to 'Processing'
 */
$order->setState(Mage_Sales_Model_Order::STATE_PROCESSING, true)->save();

/**
 * change order status to 'Completed'
 */
$order->setState(Mage_Sales_Model_Order::STATE_COMPLETE, true)->save();

/**
 * change order status to 'Closed'
 */
$order->setState(Mage_Sales_Model_Order::STATE_CLOSED, true)->save();

/**
 * change order status to 'Canceled'
 */
$order->setState(Mage_Sales_Model_Order::STATE_CANCELED, true)->save();

/**
 * change order status to 'Holded'
 */
$order->setState(Mage_Sales_Model_Order::STATE_HOLDED, true)->save();