on product detail page i want to show price other than original price via observer.

Say product with price 100 will show price as 120 or 110

which observer should i use to do same

I found product price comes from catalog/product/price.phtml

is there any way in admin > catalog > category > custom deign

to call my custom price.html for specifi category

something like below

<reference name="product.info">
            <action method="setTemplate"><template>catalog/product/view_mour.phtml</template></action>

Update code:

<?xml version="1.0"?>

and observer.php

class Mour_Customgroup_Model_Observer

    public function changeprice(Varien_Event_Observer $event) {
        $pricetoadd=Mage::getModel('catalog/product')->load($_GET['id'])->getPrice(); // error comes after adding this line

        $product = $event->getEvent()->getProduct();
        $originalprice = $product->getPrice();
        $customprice = $originalprice+$pricetoadd;

i am trying to add price of product (id from get parameter) to product price

if i remove this line : $pricetoadd=Mage::getModel('catalog/product')->load($_GET['id'])->getPrice();

it works fine

  • you can use the checkout_cart_save_after or checkout_cart_product_add_after event. you want to change this for all products or for only particular products Commented Jan 6, 2015 at 5:06
  • no i want to show different price on product detail pages only not in cart Commented Jan 6, 2015 at 5:12
  • you want the same price to be added to cart also Commented Jan 6, 2015 at 5:14
  • yeah i am able to do that via observer ,just need to show different price on product detail page via observer' Commented Jan 6, 2015 at 5:21

1 Answer 1


you can use catalog_product_load_after event to change the product price in view page.


public function loadaftercatalog($event) {
    $product = $event->getEvent()->getProduct();
    $originalprice = $product->getPrice();
    $customprice = $originalprice+20;

  • getting same price nothing adds Commented Jan 6, 2015 at 5:43
  • I tried this, it works good for me. Please clear cache and check and check you can call the coreect observer file Commented Jan 6, 2015 at 5:44
  • see i update my code according to you, cleared cache still not working Commented Jan 6, 2015 at 5:46
  • hii after adding your code i get error maximum nesting level of 200 exceeded why so ??.. Commented Jan 6, 2015 at 6:33
  • check the product price before set new price Commented Jan 6, 2015 at 7:15

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