I want to call observer in controller using if condition this is my code


class EPayment_EPayment_IndexController extends Mage_Core_Controller_Front_Action{
    public function getepaymentAction()
        $params = $this->getRequest()->getParams();
        $left_amount = $params['left_amount'];
        if($left_amount == true){
          // call observer here
           $this->getResponse()->setHeader('Content-type', 'application/json');


class EPayment_EPayment_Model_Observer
    public function setDiscount($observer)
        // some codes here

The above code $left_amount is true call Observer.php.

Note: I write code for set discount in Observer.php.

  • You Observer.php file is located inside Model folder ! Can you please confirm you want to use Model or Observer ?
    – MGento
    Dec 8, 2017 at 6:32
  • @MGento: Thanks for reply i want Observer because am trying to set discount by code
    – Ramesh S
    Dec 8, 2017 at 6:33
  • Use the dependency injection way to access the function from your Observer.php file, inside your controller
    – MGento
    Dec 8, 2017 at 6:34
  • @MGento: Like this Mage::getModel('epayment/observer')->getAlert();
    – Ramesh S
    Dec 8, 2017 at 6:36
  • @MGento: Am using magento 1.9.3
    – Ramesh S
    Dec 8, 2017 at 6:38

1 Answer 1


To dispatch event you have to write:

Mage::dispatchEvent('YOUR_EVENT_NAME', [YOUR_DATA]);

For example:

Mage::dispatchEvent('my_event', ['order' => $order]);

You should put this code inside of if in controller. Then you must configure event listener in etc/config.xml:

        <method> setDiscount </method>

And then put required logic inside of your observer.

  • Bro thanks its working i mean discount price apply. But here am creating button if i click button apply discount else discount don't apply
    – Ramesh S
    Dec 8, 2017 at 7:30
  • Do you mind to elaborate or preferably ask new question? Dec 8, 2017 at 7:33
  • Sure bro i will ask new one. will accept your answer here
    – Ramesh S
    Dec 8, 2017 at 7:34
  • bro see this magento.stackexchange.com/questions/205026/…
    – Ramesh S
    Dec 8, 2017 at 7:48

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