This is possible and you will get this (here I have set to custom text fields):
Here is the code:
// Add custom fields to product shipping tab
add_action( 'woocommerce_product_options_shipping', 'add_custom_shipping_option_to_products');
function add_custom_shipping_option_to_products(){
global $post, $product;
echo '
'; // New option group
woocommerce_wp_text_input( array(
'id' => '_custom_text_field1',
'label' => __( 'My Text Field one', 'woocommerce' ),
'placeholder' => 'something',
'desc_tip' => 'true',
'description' => __( 'Enter the custom value here.', 'woocommerce' ),
'value' => get_post_meta( $post->ID, '_custom_meta_field1', true ),
) );
woocommerce_wp_text_input( array(
'id' => '_custom_text_field2',
'label' => __( 'My Text Field two', 'woocommerce' ),
'placeholder' => 'something',
'desc_tip' => 'true',
'description' => __( 'Enter the custom value here.', 'woocommerce' ),
'value' => get_post_meta( $post->ID, '_custom_meta_field2', true ),
) );
}
// Save the custom fields values as meta data
add_action( 'woocommerce_process_product_meta', 'save_custom_shipping_option_to_products' );
function save_custom_shipping_option_to_products( $post_id ){
$custom_text_field1 = $_POST['_custom_text_field1'];
if( isset( $custom_text_field1 ) )
update_post_meta( $post_id, '_custom_meta_field1', esc_attr( $custom_text_field1 ) );
$custom_text_field2 = $_POST['_custom_text_field2'];
if( isset( $custom_text_field2 ) )
update_post_meta( $post_id, '_custom_meta_field2', esc_attr( $custom_text_field2 ) );
}
Code goes in function.php file of your active child theme (or theme) or also in any plugin file.
This code is tested on WooCommerce 3+ and works
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