You can use this snippet to update the shipping class if a line item in the cart includes a specific add-on field. You’ll need to update the field ID and shipping class slug.
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| <?php | |
| // Update shipping class if any of the specified fields has any value. | |
| // Uncomment the marked line below if you want to check fields for a specific value. | |
| add_action( 'woocommerce_before_calculate_totals', function( $cart ) { | |
| if ( is_admin() && ! defined( 'DOING_AJAX' ) ) { | |
| return; | |
| } | |
| $target_field_ids = [ 1642, 1643, 1644 ]; // the field IDs | |
| $shipping_class = 'easy'; // the shipping class slug | |
| $term = get_term_by( 'slug', $shipping_class, 'product_shipping_class' ); | |
| if ( ! $term ) { | |
| return; | |
| } | |
| foreach ( $cart->get_cart() as $cart_item ) { | |
| if ( empty( $cart_item['product_extras']['groups'] ) ) { | |
| continue; | |
| } | |
| $matched = false; | |
| foreach ( $cart_item['product_extras']['groups'] as $group ) { | |
| foreach ( $target_field_ids as $field_id ) { | |
| // if ( isset( $group[ $field_id ]['value'] ) && $group[ $field_id ]['value'] === 'Specific Value' ) { | |
| if ( ! empty( $group[ $field_id ]['value'] ) ) { | |
| $matched = true; | |
| break 2; | |
| } | |
| } | |
| } | |
| if ( $matched ) { | |
| $cart_item['data']->set_shipping_class_id( $term->term_id ); | |
| $cart_item['data']->save(); | |
| } | |
| } | |
| }, 20 ); |