Maybe it is somehow possible to call a SESSION ps_carrt reset?
I tried to find example how to call other sessions but could nto find it.

Hi Stephen,

Thank you for quick reply. Sorry for asking, how I should write a condition for specific URL which starts http://www .domain.com/index.php?option=com_virtuemart&page=checkout.gatewayresult&transactionId=

After word transactionId= every time will be different transaction ID written, so I can add contion as static URL. IF I would add % in the end will it work?

Cheers

This should do what you want:

if ($option == "com_virtuemart" and JRequest::getVar("page") == "checkout.gatewayresult") {
  require_once(CLASSPATH.'ps_cart.php');
  $ps_cart = new ps_cart;
  $ps_cart->reset();
  $_SESSION['savedcart']['idx']=0;
  $ps_cart->saveCart();
}

YEEES It worked!!!
Very big thank you to you, Stephen.

It emptied the shopping cart. It is a cool feature. I was trying to modify my payment method code but later I remembered about existence of a great module METAMOD, and i was right it did a trick.

When I tired to make code like the one below it not works:

if ($option == "com_virtuemart" and JRequest::getVar("page") == "checkout.gatewayresult") {
  require_once(CLASSPATH.'ps_cart.php');
  $ps_cart = new ps_cart;
  $ps_cart->reset();
  $_SESSION['savedcart']['idx']=0;
  $ps_cart->saveCart();
}

if ($option == "com_virtuemart" and JRequest::getVar("page") == "checkout.thankyou") {
  require_once(CLASSPATH.'ps_cart.php');
  $ps_cart = new ps_cart;
  $ps_cart->reset();
  $_SESSION['savedcart']['idx']=0;
  $ps_cart->saveCart();
}