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Question Blank Page and Errors on Checkout

14 Mar 2012 17:03 #258 by cfreek

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    • Blank Page and Errors on Checkout was created by cfreek
    I'm having the same or a similar issue as these posts:
    www.webgobe.ro/en/login/create-an-account.html
    www.webgobe.ro/en/forum/virtuemart-modul...by-sku.html?Itemid=0

    When the "Confirm Order" button is pressed, the following error is/was shown:

    [14-Mar-2012 10:00:52] PHP Fatal error: Unsupported operand types in /home/[SITENAME]/public_html/administrator/components/com_virtuemart/classes/ps_checkout.php on line 1683

    The item(s) in the cart have a shipping cost defined.

    Throughout the checkout process, the "Shipping and Handling Fee:" shows as $0.00, even though the "Shipping Rate" (located at the bottom left on a default set-up, next to the shipping address) shows a dollar amount.

    I have done a fair amount of tracing, and have partially located what/where I believe the issue to be.
    I made notes throughout the tracing, they are as follows, for your reference.
    traced code through to:
administrator/components/com_virtuemart/html/basket.php
Where:
$tax_total = $ps_checkout->calc_order_tax($order_taxable, $vars);
was the offending line.
grepped for function calc_order_tax declaration, and located the function in:
administrator/components/com_virtuemart/classes/ps_checkout.php
Line 1652 contains:
@$order_tax_details[$taxrate] += $rate - ($rate / ($taxrate+1));
This appears to be the offending line, the "@" silences errors/warnings and is the lazy man's way of keeping an application from throwing warnings.
Removing the "@" created the error (again) of:
Fatal error: Unsupported operand types in /home/machort/public_html/administrator/components/com_virtuemart/classes/ps_checkout.php on line 1652
$rate is an array, it should be a int or other numeric value, since the code is trying to perform math on it.
the value comes from:
line 1650
$this->_SHIPPING->get_rate( $d );
This function *appears* to come from:
/home/machort/public_html/administrator/components/com_virtuemart/classes/shipping/ship_product.php
Line 44

    Any ideas?

    TIA

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    14 Mar 2012 17:17 #259 by webgobe

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    • Replied by webgobe on topic Blank Page and Errors on Checkout
    Hmm, the code chunks you have found are ALL core VM codes ;) I am really not guilty for those. The module is running on several (50+ instances I am aware of, but there are more k's of downloads) sites with same code.
    Let me ask you couple of silly questions:
    If you disable the module site is working?
    If you got the errors only with the module enabled, did you added ALL the SKU's with corresponding shipping rates to the shipping methods config?

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    14 Mar 2012 17:49 #260 by cfreek

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    • Replied by cfreek on topic Blank Page and Errors on Checkout
    Correct, it is VM code; however, the tracing still appears to point to the issue coming from the add-on - VM is apparently expecting a numeric value, and your code is returning an array. Is it perhaps a version issue?

    I am running VM 1.1.9 on this site.

    I have verified that all product SKUs have a shipping cost.
    The site is using Child products, all attached to a parent product; could this make a difference?

    I disabled your per-item shipping module, and enabled the Zone Shipping module. On clicking the complete order button, I no longer received a blank page, but instead received the checkout page again with the Authorize.net error concerning using a test card number - in other words, it worked as expected.
    Also, there is a value now in the "Shipping and Handling Fee" column of the cart.

    Re-enabling your module, the fee goes back to 0 and the blank page comes up again.

    And...

    Just for giggles, I changed:
    return array ($total,$i);
    To:
    return $total;

    On line 74. After doing this, the page loads as expected and shipping charges show up (I have not yet verified they are correct).

    Thanks again!

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    14 Mar 2012 17:50 #261 by cfreek

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    • Replied by cfreek on topic Blank Page and Errors on Checkout
    Sorry:

    *on line 74 of ship_product.php

    Also, virtuemart version is 1.1.9 in case I didn't mention it.

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    14 Mar 2012 19:12 #262 by webgobe

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    • Replied by webgobe on topic Blank Page and Errors on Checkout
    Hmm, the parent-child setup can make a difference. Try to add multiple products in the cart, and see, if the values are correct.
    As I will have some time, will test myself too.
    Thanks for signalling a potential problem. I think worth digging and trying it out in various scenarios. sincerely, I never tried to use it with child products :blush:

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    16 Mar 2012 17:15 #265 by cfreek

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    • Replied by cfreek on topic Blank Page and Errors on Checkout
    Unfortunately, we had to come up with a quick "plan b", as it's on a live site. I may be able to set up a mirror when I have some extra time to do more testing with the add-on; and/or, update as you come up with fixes.

    Off topic - I haven't dug to see what it is, but a script in your website causes my IE (IE 9) to hang and the tab to lock up. Firefox hangs and gives me the option to kill the script.

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