Filters

Modify raw data structures dynamically inside PHP logic.

Common Filters

// Adjust dynamic canvas product fees
add_filter('kit_calculate_product_addon_price', function($addon_price, $design_data) {
    if (current_user_can('vip_customer')) {
        return $addon_price * 0.8; // 20% discount
    }
    return $addon_price;
}, 10, 2);