gbyat

<?php
//Display Fields
add_action( 'woocommerce_product_after_variable_attributes', 'variable_fields', 10, 3 );
//Save variation fields
add_action( 'woocommerce_save_product_variation', 'save_variable_fields', 10, 2 );


function variable_fields( $loop, $variation_data, $variation ) {
    // Text Field
    $text_field = get_post_meta( $variation->ID, '_text_field', true );