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vendor/magento/module-sales/etc/events.xml

<event name="sales_order_save_after">
    <observer name="sales_order_save_after" instance="Magento\Sales\Observer\SalesOrderSaveAfter" />
</event> 

vendor/magento/module-sales/Observer/SalesOrderSaveAfter.php

 namespace Magento\Sales\Observer;

use Magento\Framework\App\State;
use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Sales\Api\Data\OrderPaymentInterface;
use Magento\Sales\Model\ResourceModel\Order\Payment\Collection;
use Psr\Log\LoggerInterface as PsrLogger;




    class SalesOrderSaveAfter implements ObserverInterface
    {
        /**
        * @var $_logger
        */
        private $_logger;

        /**
        * @var \Magento\Framework\HTTP\Client\Curl
        */
        protected $_curl;

    /**
     * ConvertAdditionalInfoObserver constructor.
     * @param State $state
     * @param \Magento\Framework\HTTP\Client\Curl $curl
     */
    public function __construct(
        PsrLogger $logger,
        State $state,
        \Magento\Framework\HTTP\Client\Curl $curl
    )
    {
        $this->state = $state;
        $this->_curl = $curl;
        $this->_logger = $logger;
    }


    public function execute(\Magento\Framework\Event\Observer $observer)
    {   
        $ObserverInterface = $observer->getEvent()->getOrder(); //Get customer object

        if($ObserverInterface->getId()){
           echo $ObserverInterface->getId()."<br>";
        } 
        $OldStatus=$ObserverInterface->getOrigData('status');
        $NewStatus=$ObserverInterface->getStatus();
        echo "OldStatus: ".$OldStatus."<br>";
        echo "NewStatus: ".$NewStatus."<br>";
    }

}

Output

enter image description here

I am trying to get order status in sales_order_save_after observer, In the output am getting the result but it showing an interceptor error. what it means? how can i solve this issue??. Thanks in advance for your valuabe answers.

7
  • just remove var and generated folder from root Jan 19 '18 at 5:19
  • Refer this link.
    – Pratik Oza
    Jan 19 '18 at 5:28
  • i removed var/generation folder and compiled again. but it get the same error
    – Midlaj
    Jan 19 '18 at 5:28
  • show your full code of observer file. Jan 19 '18 at 5:35
  • i have given full observer code please check it
    – Midlaj
    Jan 19 '18 at 5:58

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