One-Page Checkout [Support Thread]

[lat9]

Hi,
I am just programing shipping module for Packeta (Middel Europe delivery system). And I use your OPC. I need to save new filed to order whit specificaly information about delivery place of any partner of Packeta. So I have made new field in TABLE_ORDERS, but I don't have found place who add this information for store it into the DB table.
my input name is packeta-select-branch adn need to know how to manipulate with this field to successfully save into the order table.
Thank you for your help.
Borek

Your request is not specific to OPC, you'll need for your shipping module to save pertinent information in the session when it's selected and then provide any database updates via an observer-class watching 'significant' notifications from the order.php class. For instance:

- NOTIFY_ORDER_AFTER_QUERY (needed to gather the information to view in the admin's order details)
- NOTIFY_ORDER_DURING_CREATE_ADDED_ORDER_HEADER (add the shipping information to the orders table)

[nicksab]

I have been getting the warning logs lately:

[01-Nov-2025 21:07:41 UTC] Request URI: /index.php?main_page=shopping_cart&products_id=1768&disp_order=1, IP address: 14.182.205.151, Language id 1
#0 /includes/classes/shopping_cart.php(1378): zen_debug_error_handler()
#1 /includes/classes/observers/class.checkout_one_observer.php(219): shoppingCart->get_products()
#2 /includes/autoload_func.php(64): checkout_one_observer->messageCheck()
#3 /includes/application_top.php(329): require('/home/zch1akhw6...')
#4 /index.php(25): require('/home/zch1akhw6...')
--> PHP Warning: Undefined array key "products_name" in /includes/classes/shopping_cart.php on line 1378.

I am assuming it is OPC related due to the observer but not sure

How do I fix it? it has been filling up my logs

Thank you for the assistance

[lat9]

I have been getting the warning logs lately:

[01-Nov-2025 21:07:41 UTC] Request URI: /index.php?main_page=shopping_cart&products_id=1768&disp_order=1, IP address: 14.182.205.151, Language id 1
#0 /includes/classes/shopping_cart.php(1378): zen_debug_error_handler()
#1 /includes/classes/observers/class.checkout_one_observer.php(219): shoppingCart->get_products()
#2 /includes/autoload_func.php(64): checkout_one_observer->messageCheck()
#3 /includes/application_top.php(329): require('/home/zch1akhw6...')
#4 /index.php(25): require('/home/zch1akhw6...')
--> PHP Warning: Undefined array key "products_name" in /includes/classes/shopping_cart.php on line 1378.

I am assuming it is OPC related due to the observer but not sure

How do I fix it? it has been filling up my logs

Thank you for the assistance

That's coming out of the base shopping_cart.php class on line 1378. What version of Zen Cart is in use?

[nicksab]

That's coming out of the base shopping_cart.php class on line 1378. What version of Zen Cart is in use?

I am on ZC 2.1

[lat9]

I am on ZC 2.1

It looks like the product with an id of 1768 doesn't have a name.

[Dave224]

Two questions about OPC..
(1) if a not logged in customer with an account checks out as a guest and fills out email address, name and address that match the account, OPC does not associate the guest with the account. Correct?
(2) If the customer table has extra custom fields and a customer checks out as guest, the guest customer row in the customer table may contain data in those extra fields. Where is that row cleared in OPC and is there an associated notifier that can be used to clear those extra fields.

Thank you!

Dave
zc2.1.0, OPC 2.5.5, Bootstrap 3.7.8, Remember Me 2.1.1

[lat9]

Two questions about OPC..
(1) if a not logged in customer with an account checks out as a guest and fills out email address, name and address that match the account, OPC does not associate the guest with the account. Correct?
(2) If the customer table has extra custom fields and a customer checks out as guest, the guest customer row in the customer table may contain data in those extra fields. Where is that row cleared in OPC and is there an associated notifier that can be used to clear those extra fields.

Thank you!

Dave
zc2.1.0, OPC 2.5.5, Bootstrap 3.7.8, Remember Me 2.1.1

1: Correct
2: The 'base' OPC has no knowledge of any "extra custom fields" in the customers database table. There are a number of notifications issued (https://github.com/lat9/one_page_che...cations-Issued) through which custom code can provide additional data to be entered for a guest-customer's order. The maintenance of that additional data is left to the custom code.

[swguy]

@nicksab this page might help:

https://docs.zen-cart.com/dev/databa...g_description/

[Dave224]

If a customer checks out as a guest in OPC and enters a password to create an account on the checkout success page, the customer is taken to the create account success page. Clicking the Continue button on that page takes the customer to the shopping cart page, which is empty. Where does the redirect to the shopping cart page take place (which function/method please), and is there a way to redirect to the home page instead? I've tried to find the location without success.

Thank you!

Dave
zc2.1.0, OPC 2.5.5, Bootstrap 3.7.8

[brittainmark]

[01-Aug-2025 03:07:38 America/Chicago] PHP Fatal error: Uncaught Error: Call to a member function guestCheckoutEnabled() on int in /home/client/public_html/includes/classes/observers/class.checkout_one_observer.php:216
Stack trace:
#0 /home/client/public_html/includes/autoload_func.php(64): checkout_one_observer->messageCheck()
#1 /home/client/public_html/includes/application_top.php(329): require('/home/client/...')
#2 /home/client/public_html/index.php(25): require('/home/client/...')
#3 {main}
thrown in /home/client/public_html/includes/classes/observers/class.checkout_one_observer.php on line 216

Was a solution/reason found for this I have had it ocour 96 times last month but I cannot recreate it on my test system.
Zen cart 2.1 opc 2.5.5 (2025-09-19) php 8.3.27