Prestashop Module Override -

// Original logic would run if we called parent $originalCost = parent::calculateCost($products);

// New logic: add $5 handling fee for fragile items $extraFee = 0; foreach ($products as $product) if ($product['is_fragile']) $extraFee += 5; prestashop module override

This is where come into play. What Is a Module Override? An override is a safe, core-respecting way to replace or extend the logic of an existing module without modifying its original source files. // Original logic would run if we called

Delete /var/cache/dev/class_index.php (and /var/cache/prod/ in production). document them religiously

return $originalCost + $extraFee;

/override/modules/customshipping/classes/CustomShippingCalculator.php Your override must extend the original class and use the same namespace.

Use overrides sparingly, document them religiously, and always ask: “Could I achieve this with a hook or a custom module instead?”