Change order status via PHP with Magento2

Question

Using Magento ver. 2.0.7 I am trying to use this code to change order to the status of "Processing", but i get an error, i think i am missing some prerequisite to call, but i can't figure it out.

[25-Oct-2016 13:11:30 America/Detroit] PHP Fatal error: Class 'Magento\Framework\App\ObjectManager' not found in /chroot/home/testplat/test.platinait.ca/html/pub/orderstatus.php on line 4

<?php

$orderId = 000000193;
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$order = $objectManager->create('\Magento\Sales\Model\Order')
                           ->load($orderId); 

$order->setState("processing")->setStatus("processing");

$order->save();

Answer 1

We can set order status like.

$orderId = 000000193;
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$order_status = $objectManager->get('Magento\Sales\Mode\Order')->load($orderId);
$order_status->setStatus('processing');
$order_status->save();

Recommended to do this by creating custom module as well as passing the class in to constructor as a dependency.

Answer 2

You should use 'getResource' method. Direct load, save and delete are deprecated in Mangeto >= 2.1.0.

Example :

$order_status->getResource()->save($order_status);