php 8.4 bug

Hello,

I would like to report a compatibility issue that appears to affect your plugin when running on PHP 8.4.

Environment

• WordPress: 7.0.2
• WooCommerce: Latest version
• PHP: 8.4
• Theme: Woodmart 8.5.5

Problem

A fatal error occurs while updating the WooCommerce cart via AJAX.

The error is:

Uncaught TypeError: method_exists(): Argument #1 ($object_or_class) must be of type object|string, false given

File:

wp-content/plugins/woo-min-max-quantity-step-control-single/includes/min-max-controller.php

Line:

987

Backtrace:

#0 .../min-max-controller.php(987): method_exists(false, 'is_sold_individually')
#1 .../class-wp-hook.php(341): WC_MMQ\Includes\Min_Max_Controller->update_cart_validation(...)
#2 .../plugin.php(205): WP_Hook->apply_filters(...)
#3 .../woodmart/inc/integrations/woocommerce/modules/quantity.php(62): apply_filters('woocommerce_update_cart_validation', ...)
#4 .../class-wp-hook.php(341): woodmart_update_cart_item('')
#5 .../plugin.php(522): WP_Hook->do_action(...)
#6 .../wp-admin/admin-ajax.php(207): do_action(...)

Cause

It appears that wc_get_product( $product_id ) can return false in some situations. However, the plugin immediately calls:

method_exists( $this->product, 'is_sold_individually' )

When $this->product is false, PHP 8.4 throws a fatal TypeError.

This seems to be caused by a missing validation before calling method_exists() or other product methods.

Suggested Fix

Before calling any product methods, please verify that the returned value is a valid WC_Product object. For example:

$this->product = wc_get_product( $product_id );

if ( ! $this->product instanceof WC_Product ) {
    return $bool;
}

if ( $this->product->is_sold_individually() ) {
    return $bool;
}

or use another equivalent validation that ensures $this->product is a valid object before accessing its methods.

I believe this is a compatibility issue with newer PHP versions rather than WooCommerce itself.

Thank you for your work on the plugin. I hope this issue can be addressed in a future update.