Save form field from custom column in the Table of Rates

betrs-save-column-data.php

/**
 * Save form field from custom column in the Table of Rates
 *
 * @return string
 */
function betrs_save_column_data( $save_data, $option_ID, $row_ID ) {
    // sanitize arguments
    $option_ID = intval( $option_ID );
    $row_ID = intval( $row_ID );

    // get selected value
    $selection = ( isset( $_POST['provider'][ $option_ID ][ $row_ID ] ) ) ? sanitize_text_field( $_POST['provider'][ $option_ID ][ $row_ID ] ) : '';

    // add value to saved data array
    $save_data['provider'] = $selection;

    return $save_data;
}
add_filter( 'betrs_shipping_table_save_row', 'betrs_save_column_data', 10, 3 );