Invalid argument supplied for foreach()

[rstar23]

zen 1.3.9g

5.3.10 (Zend: 2.3.0)
MySQL 5.1.61-0ubuntu0.10.04.1

The error is

PHP Warning: Invalid argument supplied for foreach()

and point so "includes/classes/order.php on line 522"

order.php contains no customization that I aware of.

No sure what else to add or where to look for a problem.

Would appreciate any feedback

tia

[RodG]

No sure what else to add or where to look for a problem.

Please provide
1. A URL to the store.
2. More information as to what we will need to do to replicate the problem.

Cheers
Rod

[rstar23]

The store url is legacyhomeschool.com

Can't tell you how to replicate the error. It shows up sporadically. Will see a series of messages in the debug log spanning about an one hour period and then it stops for a few days.

I have tried placing orders in just about every combination I could think of - with taxes, without taxes, etc. So far I have not been able to force the error.

This is the code block from order.php. The php error points at line 522

if (DISPLAY_PRICE_WITH_TAX == 'true') {
// calculate the amount of tax "inc"luded in price (used if tax-in pricing is enabled)
$tax_add = $shown_price - ($shown_price / (($products_tax < 10) ? "1.0" . str_replace('.', '', $products_tax) : "1." . str_replace('.', '', $products_tax)));
} else {
// calculate the amount of tax for this product (assuming tax is NOT included in the price)
// $tax_add = zen_round(($products_tax / 100) * $shown_price, $currencies->currencies[$this->info['currency']]['decimal_places']);
$tax_add = ($products_tax/100) * $shown_price;
}
$this->info['tax'] += $tax_add;

//this is line 522 referenced in php error
foreach ($taxRates as $taxDescription=>$taxRate)
{
$taxAdd = zen_calculate_tax($this->products[$index]['final_price']*$this->products[$index]['qty'], $taxRate)
+ zen_calculate_tax($this->products[$index]['onetime_charges'], $taxRate);
if (isset($this->info['tax_groups'][$taxDescription]))
{
$this->info['tax_groups'][$taxDescription] += $taxAdd;
} else
{
$this->info['tax_groups'][$taxDescription] = $taxAdd;
}
}


Not sure what else I can tell you. Any help will be appreciated.

[DrByte]

Chances are the error is a result of the $taxRate variable being empty, or at least not being an array.
And it's built on line 434 with a combination of several parameters including the customer's address info and corresponding zones as well as the product's tax class and other associated data.
So, your problems are likely related to addons which affect tax calculations and/or zone calculations, and/or your zone definitions and associated tax classes and tax rates, as well as your store's settings for tax calculation, etc.

If you could state exactly how to trigger the error message, then it would be a lot easier to tell you more specifically what might need fixing.
Generally it seems like you've got some bad zone definitions and tax rates. Maybe you hacked out a bunch of countries and states/provinces and now your customers are choosing entries that have no corresponding country/region matching, and thus it's having trouble matching taxes properly. Or worse, maybe you've installed tax-related addons that aren't working properly.

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