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Avoid combing physical and virtual products in the cart when using WooCommerce

Avoid combing physical and virtual products in the cart when using WooCommerce on your child site.

Snippet Type

Execute on Child Sites

Snippet

// Check cart items and avoid add to cart
add_filter( 'woocommerce_add_to_cart_validation', 'filter_wc_add_to_cart_validation', 10, 3 );
function filter_wc_add_to_cart_validation( $passed, $product_id, $quantity ) {
    $is_virtual = $is_physical = false;
    $product = wc_get_product( $product_id );

    if( $product->is_virtual() ) {
        $is_virtual = true;
    } else {
        $is_physical = true;
    }

    // Loop though cart items
    foreach( WC()->cart->get_cart() as $cart_item ) {
        // Check for specific product categories
        if ( ( $cart_item['data']->is_virtual() && $is_physical )
        || ( ! $cart_item['data']->is_virtual() && $is_virtual ) ) {
            wc_add_notice( __( "You can't combine physical and virtual products together.", "woocommerce" ), 'error' );
            return false;
        }
    }

    return $passed;
}


// For security: check cart items and avoid checkout
add_action( 'woocommerce_check_cart_items', 'filter_wc_check_cart_items' );
function filter_wc_check_cart_items() {
    $cart = WC()->cart;
    $cart_items = $cart->get_cart();
    $has_virtual = $has_physical = false;

    // Loop though cart items
    foreach( WC()->cart->get_cart() as $cart_item ) {
        // Check for specific product categories
        if ( $cart_item['data']->is_virtual() ) {
            $has_virtual = true;
        } else {
            $has_physical = true;
        }
    }

    if ( $has_virtual && $has_physical ) {
        // Display an error notice (and avoid checkout)
        wc_add_notice( __( "You can't combine physical and virtual products together.", "woocommerce" ), 'error' );
    }
}
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