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Fatal PHP Error in woocommerce_package_rates – Unsupported operand types (string * float)

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The support doesn work on Saturdays and Sundays, so some Friday requests can be answered on Monday.
skysolution(@skysolution)
47 Posts
Customers
June 13, 2025, 12:18

Hi support.

I’m encountering a fatal PHP error on my WooCommerce store that originates from your plugin WOOCS – WooCommerce Currency Switcher. The server log reports the following error:

PHP Fatal error: Uncaught TypeError: Unsupported operand types: string * float in /wp-content/plugins/woocommerce-currency-switcher/classes/woocs.php:4132

The issue occurs in the woocommerce_package_rates() function, specifically in this line:
$value = $rate->cost * $currencies[$this->current_currency]['rate'];

It seems that in some cases, $rate->cost or the currency rate is stored as a string (e.g. "125,00"), which causes a fatal error when attempting multiplication.

To prevent this, a type cast could be added:
$value = floatval($rate->cost) * floatval($currencies[$this->current_currency]['rate']);

Is this a known issue, and will it be addressed in a future update?

Thanks in advance for your support.

#1
Pablo Borysenco(@pavlo_borysenco)
34,196 Posts
June 13, 2025, 12:45

Hello

What plugin version number are you using?

#2
skysolution(@skysolution)
47 PostsTopic Author
Customers
June 13, 2025, 13:01

Hi

First of all, I realized I was running version 2.4.1.9, which I know is quite outdated. In that version, I managed to resolve the issue by modifying the code as previously mentioned (specifically at line 4092).

Afterwards, I upgraded to the latest version 2.4.2.3. However, the issue still persists — even after clearing all caches, both server-side and browser-side. I’m still unable to add products to the cart when browsing the site in a non-default language, which seems to be the core of the problem.

Please let me know if there’s anything else I should try.

Thanks!

#3
Pablo Borysenco(@pavlo_borysenco)
34,196 Posts
June 16, 2025, 10:04

Hello

Thank you for your cooperation.

Yes, we will fix this in the next version.

#4