WooCommerce customize advanced shipping rules by code

1. Restrict Shipping by Postcode

php
add_filter( 'woocommerce_shipping_packages', 'restrict_shipping_by_postcode' );
function restrict_shipping_by_postcode( $packages ) {
    $customer_postcode = WC()->customer->get_shipping_postcode();
    $allowed_postcodes = array( '12345', '67890' );

    foreach ( $packages as $package_key => $package ) {
        if ( ! in_array( $customer_postcode, $allowed_postcodes ) ) {
            unset( $packages[ $package_key ] );
        }
    }

    return $packages;
}

2. Restrict Shipping by Product Category

php
add_filter( 'woocommerce_package_rates', 'restrict_shipping_by_product_category', 10, 2 );
function restrict_shipping_by_product_category( $rates, $package ) {
    $restricted_categories = array( 'category-slug-1', 'category-slug-2' );

    foreach ( $package['contents'] as $item_key => $item ) {
        $product_categories = get_the_terms( $item['product_id'], 'product_cat' );
        if ( $product_categories ) {
            foreach ( $product_categories as $category ) {
                if ( in_array( $category->slug, $restricted_categories ) ) {
                    unset( $rates[ $item_key ] );
                }
            }
        }
    }

    return $rates;
}

3. Restrict Shipping by Product Weight

php
add_filter( 'woocommerce_package_rates', 'restrict_shipping_by_product_weight', 10, 2 );
function restrict_shipping_by_product_weight( $rates, $package ) {
    $max_weight = 10; // Maximum allowed weight per package

    $total_weight = 0;
    foreach ( $package['contents'] as $item_key => $item ) {
        $total_weight += $item['data']->get_weight() * $item['quantity'];
    }

    if ( $total_weight > $max_weight ) {
        return array();
    }

    return $rates;
}

4. Restrict Shipping by Cart Subtotal

php
add_filter( 'woocommerce_package_rates', 'restrict_shipping_by_cart_subtotal', 10, 2 );
function restrict_shipping_by_cart_subtotal( $rates, $package ) {
    $min_subtotal = 50; // Minimum cart subtotal required

    $cart_subtotal = WC()->cart->get_subtotal();
    if ( $cart_subtotal < $min_subtotal ) {
        return array();
    }

    return $rates;
}

These are just a few examples of how you can customize advanced shipping rules in WooCommerce using code. You can combine these techniques and create more complex rules based on your specific requirements.