很难弄明白这一点。我为我的woocommerce签出页面创建了一些自定义签出字段。然后，我将自定义字段显示在确认/感谢页面上。但我的问题是，即使用户没有向字段提交信息，字段标签仍然显示（在本例中为“订单详细信息：”）。如何使自定义字段仅在有内容显示时显示？或者换句话说，当字段为空时，如何隐藏标签？

/**
 * Add the field to the checkout (other details)
 */
add_filter ( \'woocommerce_checkout_fields\', \'custom_override_checkout_fields6\' );

function custom_override_checkout_fields6( $fields ) {

$fields[\'order\'][\'other_details\'] = array(

    \'type\'          => \'textarea\',
    \'class\'         => array(\'extracheckoutinfo form-row-wide\'),
    \'label\'         => __(\'Other Details\'),
    \'placeholder\'   => __(\'Anything else we should know? Please provide as many details as possible.\'),
    \'required\'      => false
    );

  return $fields;

}


/**
 * Update the order meta with field value 
 */
add_action( \'woocommerce_checkout_update_order_meta\', \'other_details_field_update_order_meta\' );

function other_details_field_update_order_meta( $order_id ) {
if ( ! empty( $_POST[\'other_details\'] ) ) {
    update_post_meta( $order_id, \'Other Details\', sanitize_text_field( $_POST[\'other_details\'] ) );
}
}



/**
 * Add the fields to order confirmation/thank you page.
 **/

add_action( \'woocommerce_order_details_after_order_table\', "my_woocommerce_other_details_after_order_table", 10, 1 );

function my_woocommerce_other_details_after_order_table( $order ) {

echo \'<p><strong>\'.__(\'Other Details\').\':</strong> \' . get_post_meta( $order->id, \'Other Details\', true ) . \'</p>\';

}


/**
 * Display field value on the order edit page
 */
add_action( \'woocommerce_admin_order_data_after_billing_address\', \'other_details_field_display_admin_order_meta\', 10, 1 );

function other_details_field_display_admin_order_meta($order){
echo \'<p><strong>\'.__(\'Other Details\').\':</strong> \' . get_post_meta( $order->id, \'Other Details\', true ) . \'</p>\';
}